/*************************************************************************/
/*  bindings_generator.cpp                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "bindings_generator.h"

#if defined(DEBUG_METHODS_ENABLED) && defined(TOOLS_ENABLED)

#include "core/config/engine.h"
#include "core/core_constants.h"
#include "core/io/compression.h"
#include "core/os/dir_access.h"
#include "core/os/file_access.h"
#include "core/os/os.h"
#include "core/string/ucaps.h"

#include "../glue/cs_glue_version.gen.h"
#include "../godotsharp_defs.h"
#include "../mono_gd/gd_mono_marshal.h"
#include "../utils/path_utils.h"
#include "../utils/string_utils.h"

#define CS_INDENT "    " // 4 whitespaces

#define INDENT1 CS_INDENT
#define INDENT2 INDENT1 INDENT1
#define INDENT3 INDENT2 INDENT1
#define INDENT4 INDENT3 INDENT1
#define INDENT5 INDENT4 INDENT1

#define MEMBER_BEGIN "\n" INDENT2

#define OPEN_BLOCK "{\n"
#define CLOSE_BLOCK "}\n"

#define OPEN_BLOCK_L2 INDENT2 OPEN_BLOCK INDENT3
#define OPEN_BLOCK_L3 INDENT3 OPEN_BLOCK INDENT4
#define CLOSE_BLOCK_L2 INDENT2 CLOSE_BLOCK
#define CLOSE_BLOCK_L3 INDENT3 CLOSE_BLOCK

#define CS_FIELD_MEMORYOWN "memoryOwn"
#define CS_PARAM_METHODBIND "method"
#define CS_PARAM_INSTANCE "ptr"
#define CS_SMETHOD_GETINSTANCE "GetPtr"
#define CS_METHOD_CALL "Call"

#define GLUE_HEADER_FILE "glue_header.h"
#define ICALL_PREFIX "godot_icall_"
#define SINGLETON_ICALL_SUFFIX "_get_singleton"
#define ICALL_GET_METHODBIND "__ClassDB_get_method"

#define C_LOCAL_RET "ret"
#define C_LOCAL_VARARG_RET "vararg_ret"
#define C_LOCAL_PTRCALL_ARGS "call_args"
#define C_MACRO_OBJECT_CONSTRUCT "GODOTSHARP_INSTANCE_OBJECT"

#define C_NS_MONOUTILS "GDMonoUtils"
#define C_NS_MONOINTERNALS "GDMonoInternals"
#define C_METHOD_TIE_MANAGED_TO_UNMANAGED C_NS_MONOINTERNALS "::tie_managed_to_unmanaged"
#define C_METHOD_UNMANAGED_GET_MANAGED C_NS_MONOUTILS "::unmanaged_get_managed"

#define C_NS_MONOMARSHAL "GDMonoMarshal"
#define C_METHOD_MANAGED_TO_VARIANT C_NS_MONOMARSHAL "::mono_object_to_variant"
#define C_METHOD_MANAGED_FROM_VARIANT C_NS_MONOMARSHAL "::variant_to_mono_object"
#define C_METHOD_MONOSTR_TO_GODOT C_NS_MONOMARSHAL "::mono_string_to_godot"
#define C_METHOD_MONOSTR_FROM_GODOT C_NS_MONOMARSHAL "::mono_string_from_godot"
#define C_METHOD_MONOARRAY_TO(m_type) C_NS_MONOMARSHAL "::mono_array_to_" #m_type
#define C_METHOD_MONOARRAY_FROM(m_type) C_NS_MONOMARSHAL "::" #m_type "_to_mono_array"
#define C_METHOD_MANAGED_TO_CALLABLE C_NS_MONOMARSHAL "::managed_to_callable"
#define C_METHOD_MANAGED_FROM_CALLABLE C_NS_MONOMARSHAL "::callable_to_managed"
#define C_METHOD_MANAGED_TO_SIGNAL C_NS_MONOMARSHAL "::signal_info_to_callable"
#define C_METHOD_MANAGED_FROM_SIGNAL C_NS_MONOMARSHAL "::callable_to_signal_info"

#define BINDINGS_GENERATOR_VERSION UINT32_C(13)

const char *BindingsGenerator::TypeInterface::DEFAULT_VARARG_C_IN("\t%0 %1_in = %1;\n");

static String fix_doc_description(const String &p_bbcode) {
	// This seems to be the correct way to do this. It's the same EditorHelp does.

	return p_bbcode.dedent()
			.replace("\t", "")
			.replace("\r", "")
			.strip_edges();
}

static String snake_to_pascal_case(const String &p_identifier, bool p_input_is_upper = false) {
	String ret;
	Vector<String> parts = p_identifier.split("_", true);

	for (int i = 0; i < parts.size(); i++) {
		String part = parts[i];

		if (part.length()) {
			part[0] = _find_upper(part[0]);
			if (p_input_is_upper) {
				for (int j = 1; j < part.length(); j++) {
					part[j] = _find_lower(part[j]);
				}
			}
			ret += part;
		} else {
			if (i == 0 || i == (parts.size() - 1)) {
				// Preserve underscores at the beginning and end
				ret += "_";
			} else {
				// Preserve contiguous underscores
				if (parts[i - 1].length()) {
					ret += "__";
				} else {
					ret += "_";
				}
			}
		}
	}

	return ret;
}

static String snake_to_camel_case(const String &p_identifier, bool p_input_is_upper = false) {
	String ret;
	Vector<String> parts = p_identifier.split("_", true);

	for (int i = 0; i < parts.size(); i++) {
		String part = parts[i];

		if (part.length()) {
			if (i != 0) {
				part[0] = _find_upper(part[0]);
			}
			if (p_input_is_upper) {
				for (int j = i != 0 ? 1 : 0; j < part.length(); j++) {
					part[j] = _find_lower(part[j]);
				}
			}
			ret += part;
		} else {
			if (i == 0 || i == (parts.size() - 1)) {
				// Preserve underscores at the beginning and end
				ret += "_";
			} else {
				// Preserve contiguous underscores
				if (parts[i - 1].length()) {
					ret += "__";
				} else {
					ret += "_";
				}
			}
		}
	}

	return ret;
}

String BindingsGenerator::bbcode_to_xml(const String &p_bbcode, const TypeInterface *p_itype) {
	// Based on the version in EditorHelp

	if (p_bbcode.is_empty()) {
		return String();
	}

	DocTools *doc = EditorHelp::get_doc_data();

	String bbcode = p_bbcode;

	StringBuilder xml_output;

	xml_output.append("<para>");

	List<String> tag_stack;
	bool code_tag = false;

	int pos = 0;
	while (pos < bbcode.length()) {
		int brk_pos = bbcode.find("[", pos);

		if (brk_pos < 0) {
			brk_pos = bbcode.length();
		}

		if (brk_pos > pos) {
			String text = bbcode.substr(pos, brk_pos - pos);
			if (code_tag || tag_stack.size() > 0) {
				xml_output.append(text.xml_escape());
			} else {
				Vector<String> lines = text.split("\n");
				for (int i = 0; i < lines.size(); i++) {
					if (i != 0) {
						xml_output.append("<para>");
					}

					xml_output.append(lines[i].xml_escape());

					if (i != lines.size() - 1) {
						xml_output.append("</para>\n");
					}
				}
			}
		}

		if (brk_pos == bbcode.length()) {
			break; // nothing else to add
		}

		int brk_end = bbcode.find("]", brk_pos + 1);

		if (brk_end == -1) {
			String text = bbcode.substr(brk_pos, bbcode.length() - brk_pos);
			if (code_tag || tag_stack.size() > 0) {
				xml_output.append(text.xml_escape());
			} else {
				Vector<String> lines = text.split("\n");
				for (int i = 0; i < lines.size(); i++) {
					if (i != 0) {
						xml_output.append("<para>");
					}

					xml_output.append(lines[i].xml_escape());

					if (i != lines.size() - 1) {
						xml_output.append("</para>\n");
					}
				}
			}

			break;
		}

		String tag = bbcode.substr(brk_pos + 1, brk_end - brk_pos - 1);

		if (tag.begins_with("/")) {
			bool tag_ok = tag_stack.size() && tag_stack.front()->get() == tag.substr(1, tag.length());

			if (!tag_ok) {
				xml_output.append("[");
				pos = brk_pos + 1;
				continue;
			}

			tag_stack.pop_front();
			pos = brk_end + 1;
			code_tag = false;

			if (tag == "/url") {
				xml_output.append("</a>");
			} else if (tag == "/code") {
				xml_output.append("</c>");
			} else if (tag == "/codeblock") {
				xml_output.append("</code>");
			}
		} else if (code_tag) {
			xml_output.append("[");
			pos = brk_pos + 1;
		} else if (tag.begins_with("method ") || tag.begins_with("member ") || tag.begins_with("signal ") || tag.begins_with("enum ") || tag.begins_with("constant ")) {
			String link_target = tag.substr(tag.find(" ") + 1, tag.length());
			String link_tag = tag.substr(0, tag.find(" "));

			Vector<String> link_target_parts = link_target.split(".");

			if (link_target_parts.size() <= 0 || link_target_parts.size() > 2) {
				ERR_PRINT("Invalid reference format: '" + tag + "'.");

				xml_output.append("<c>");
				xml_output.append(tag);
				xml_output.append("</c>");

				pos = brk_end + 1;
				continue;
			}

			const TypeInterface *target_itype;
			StringName target_cname;

			if (link_target_parts.size() == 2) {
				target_itype = _get_type_or_null(TypeReference(link_target_parts[0]));
				if (!target_itype) {
					target_itype = _get_type_or_null(TypeReference("_" + link_target_parts[0]));
				}
				target_cname = link_target_parts[1];
			} else {
				target_itype = p_itype;
				target_cname = link_target_parts[0];
			}

			if (link_tag == "method") {
				if (!target_itype || !target_itype->is_object_type) {
					if (OS::get_singleton()->is_stdout_verbose()) {
						if (target_itype) {
							OS::get_singleton()->print("Cannot resolve method reference for non-Godot.Object type in documentation: %s\n", link_target.utf8().get_data());
						} else {
							OS::get_singleton()->print("Cannot resolve type from method reference in documentation: %s\n", link_target.utf8().get_data());
						}
					}

					// TODO Map what we can
					xml_output.append("<c>");
					xml_output.append(link_target);
					xml_output.append("</c>");
				} else {
					const MethodInterface *target_imethod = target_itype->find_method_by_name(target_cname);

					if (target_imethod) {
						xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
						xml_output.append(target_itype->proxy_name);
						xml_output.append(".");
						xml_output.append(target_imethod->proxy_name);
						xml_output.append("\"/>");
					}
				}
			} else if (link_tag == "member") {
				if (!target_itype || !target_itype->is_object_type) {
					if (OS::get_singleton()->is_stdout_verbose()) {
						if (target_itype) {
							OS::get_singleton()->print("Cannot resolve member reference for non-Godot.Object type in documentation: %s\n", link_target.utf8().get_data());
						} else {
							OS::get_singleton()->print("Cannot resolve type from member reference in documentation: %s\n", link_target.utf8().get_data());
						}
					}

					// TODO Map what we can
					xml_output.append("<c>");
					xml_output.append(link_target);
					xml_output.append("</c>");
				} else {
					const PropertyInterface *target_iprop = target_itype->find_property_by_name(target_cname);

					if (target_iprop) {
						xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
						xml_output.append(target_itype->proxy_name);
						xml_output.append(".");
						xml_output.append(target_iprop->proxy_name);
						xml_output.append("\"/>");
					}
				}
			} else if (link_tag == "signal") {
				// We do not declare signals in any way in C#, so there is nothing to reference
				xml_output.append("<c>");
				xml_output.append(link_target);
				xml_output.append("</c>");
			} else if (link_tag == "enum") {
				StringName search_cname = !target_itype ? target_cname :
														  StringName(target_itype->name + "." + (String)target_cname);

				const Map<StringName, TypeInterface>::Element *enum_match = enum_types.find(search_cname);

				if (!enum_match && search_cname != target_cname) {
					enum_match = enum_types.find(target_cname);
				}

				if (enum_match) {
					const TypeInterface &target_enum_itype = enum_match->value();

					xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
					xml_output.append(target_enum_itype.proxy_name); // Includes nesting class if any
					xml_output.append("\"/>");
				} else {
					ERR_PRINT("Cannot resolve enum reference in documentation: '" + link_target + "'.");

					xml_output.append("<c>");
					xml_output.append(link_target);
					xml_output.append("</c>");
				}
			} else if (link_tag == "const") {
				if (!target_itype || !target_itype->is_object_type) {
					if (OS::get_singleton()->is_stdout_verbose()) {
						if (target_itype) {
							OS::get_singleton()->print("Cannot resolve constant reference for non-Godot.Object type in documentation: %s\n", link_target.utf8().get_data());
						} else {
							OS::get_singleton()->print("Cannot resolve type from constant reference in documentation: %s\n", link_target.utf8().get_data());
						}
					}

					// TODO Map what we can
					xml_output.append("<c>");
					xml_output.append(link_target);
					xml_output.append("</c>");
				} else if (!target_itype && target_cname == name_cache.type_at_GlobalScope) {
					String target_name = (String)target_cname;

					// Try to find as a global constant
					const ConstantInterface *target_iconst = find_constant_by_name(target_name, global_constants);

					if (target_iconst) {
						// Found global constant
						xml_output.append("<see cref=\"" BINDINGS_NAMESPACE "." BINDINGS_GLOBAL_SCOPE_CLASS ".");
						xml_output.append(target_iconst->proxy_name);
						xml_output.append("\"/>");
					} else {
						// Try to find as global enum constant
						const EnumInterface *target_ienum = nullptr;

						for (const List<EnumInterface>::Element *E = global_enums.front(); E; E = E->next()) {
							target_ienum = &E->get();
							target_iconst = find_constant_by_name(target_name, target_ienum->constants);
							if (target_iconst) {
								break;
							}
						}

						if (target_iconst) {
							xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
							xml_output.append(target_ienum->cname);
							xml_output.append(".");
							xml_output.append(target_iconst->proxy_name);
							xml_output.append("\"/>");
						} else {
							ERR_PRINT("Cannot resolve global constant reference in documentation: '" + link_target + "'.");

							xml_output.append("<c>");
							xml_output.append(link_target);
							xml_output.append("</c>");
						}
					}
				} else {
					String target_name = (String)target_cname;

					// Try to find the constant in the current class
					const ConstantInterface *target_iconst = find_constant_by_name(target_name, target_itype->constants);

					if (target_iconst) {
						// Found constant in current class
						xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
						xml_output.append(target_itype->proxy_name);
						xml_output.append(".");
						xml_output.append(target_iconst->proxy_name);
						xml_output.append("\"/>");
					} else {
						// Try to find as enum constant in the current class
						const EnumInterface *target_ienum = nullptr;

						for (const List<EnumInterface>::Element *E = target_itype->enums.front(); E; E = E->next()) {
							target_ienum = &E->get();
							target_iconst = find_constant_by_name(target_name, target_ienum->constants);
							if (target_iconst) {
								break;
							}
						}

						if (target_iconst) {
							xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
							xml_output.append(target_itype->proxy_name);
							xml_output.append(".");
							xml_output.append(target_ienum->cname);
							xml_output.append(".");
							xml_output.append(target_iconst->proxy_name);
							xml_output.append("\"/>");
						} else {
							ERR_PRINT("Cannot resolve constant reference in documentation: '" + link_target + "'.");

							xml_output.append("<c>");
							xml_output.append(link_target);
							xml_output.append("</c>");
						}
					}
				}
			}

			pos = brk_end + 1;
		} else if (doc->class_list.has(tag)) {
			if (tag == "Array" || tag == "Dictionary") {
				xml_output.append("<see cref=\"" BINDINGS_NAMESPACE_COLLECTIONS ".");
				xml_output.append(tag);
				xml_output.append("\"/>");
			} else if (tag == "bool" || tag == "int") {
				xml_output.append("<see cref=\"");
				xml_output.append(tag);
				xml_output.append("\"/>");
			} else if (tag == "float") {
				xml_output.append("<see cref=\""
#ifdef REAL_T_IS_DOUBLE
								  "double"
#else
								  "float"
#endif
								  "\"/>");
			} else if (tag == "Variant") {
				// We use System.Object for Variant, so there is no Variant type in C#
				xml_output.append("<c>Variant</c>");
			} else if (tag == "String") {
				xml_output.append("<see cref=\"string\"/>");
			} else if (tag == "Nil") {
				xml_output.append("<see langword=\"null\"/>");
			} else if (tag.begins_with("@")) {
				// @GlobalScope, @GDScript, etc
				xml_output.append("<c>");
				xml_output.append(tag);
				xml_output.append("</c>");
			} else if (tag == "PackedByteArray") {
				xml_output.append("<see cref=\"T:byte[]\"/>");
			} else if (tag == "PackedInt32Array") {
				xml_output.append("<see cref=\"T:int[]\"/>");
			} else if (tag == "PackedInt64Array") {
				xml_output.append("<see cref=\"T:long[]\"/>");
			} else if (tag == "PackedFloat32Array") {
				xml_output.append("<see cref=\"T:float[]\"/>");
			} else if (tag == "PackedFloat64Array") {
				xml_output.append("<see cref=\"T:double[]\"/>");
			} else if (tag == "PackedStringArray") {
				xml_output.append("<see cref=\"T:string[]\"/>");
			} else if (tag == "PackedVector2Array") {
				xml_output.append("<see cref=\"T:" BINDINGS_NAMESPACE ".Vector2[]\"/>");
			} else if (tag == "PackedVector3Array") {
				xml_output.append("<see cref=\"T:" BINDINGS_NAMESPACE ".Vector3[]\"/>");
			} else if (tag == "PackedColorArray") {
				xml_output.append("<see cref=\"T:" BINDINGS_NAMESPACE ".Color[]\"/>");
			} else {
				const TypeInterface *target_itype = _get_type_or_null(TypeReference(tag));

				if (!target_itype) {
					target_itype = _get_type_or_null(TypeReference("_" + tag));
				}

				if (target_itype) {
					xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
					xml_output.append(target_itype->proxy_name);
					xml_output.append("\"/>");
				} else {
					ERR_PRINT("Cannot resolve type reference in documentation: '" + tag + "'.");

					xml_output.append("<c>");
					xml_output.append(tag);
					xml_output.append("</c>");
				}
			}

			pos = brk_end + 1;
		} else if (tag == "b") {
			// bold is not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "i") {
			// italics is not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "code") {
			xml_output.append("<c>");

			code_tag = true;
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "codeblock") {
			xml_output.append("<code>");

			code_tag = true;
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "kbd") {
			// keyboard combinations are not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "center") {
			// center alignment is not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "br") {
			xml_output.append("\n"); // FIXME: Should use <para> instead. Luckily this tag isn't used for now.
			pos = brk_end + 1;
		} else if (tag == "u") {
			// underline is not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "s") {
			// strikethrough is not supported in xml comments
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "url") {
			int end = bbcode.find("[", brk_end);
			if (end == -1) {
				end = bbcode.length();
			}
			String url = bbcode.substr(brk_end + 1, end - brk_end - 1);
			xml_output.append("<a href=\"");
			xml_output.append(url);
			xml_output.append("\">");
			xml_output.append(url);

			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag.begins_with("url=")) {
			String url = tag.substr(4, tag.length());
			xml_output.append("<a href=\"");
			xml_output.append(url);
			xml_output.append("\">");

			pos = brk_end + 1;
			tag_stack.push_front("url");
		} else if (tag == "img") {
			int end = bbcode.find("[", brk_end);
			if (end == -1) {
				end = bbcode.length();
			}
			String image = bbcode.substr(brk_end + 1, end - brk_end - 1);

			// Not supported. Just append the bbcode.
			xml_output.append("[img]");
			xml_output.append(image);
			xml_output.append("[/img]");

			pos = end;
			tag_stack.push_front(tag);
		} else if (tag.begins_with("color=")) {
			// Not supported.
			pos = brk_end + 1;
			tag_stack.push_front("color");
		} else if (tag.begins_with("font=")) {
			// Not supported.
			pos = brk_end + 1;
			tag_stack.push_front("font");
		} else {
			xml_output.append("["); // ignore
			pos = brk_pos + 1;
		}
	}

	xml_output.append("</para>");

	return xml_output.as_string();
}

int BindingsGenerator::_determine_enum_prefix(const EnumInterface &p_ienum) {
	CRASH_COND(p_ienum.constants.is_empty());

	const ConstantInterface &front_iconstant = p_ienum.constants.front()->get();
	Vector<String> front_parts = front_iconstant.name.split("_", /* p_allow_empty: */ true);
	int candidate_len = front_parts.size() - 1;

	if (candidate_len == 0) {
		return 0;
	}

	for (const List<ConstantInterface>::Element *E = p_ienum.constants.front()->next(); E; E = E->next()) {
		const ConstantInterface &iconstant = E->get();

		Vector<String> parts = iconstant.name.split("_", /* p_allow_empty: */ true);

		int i;
		for (i = 0; i < candidate_len && i < parts.size(); i++) {
			if (front_parts[i] != parts[i]) {
				// HARDCODED: Some Flag enums have the prefix 'FLAG_' for everything except 'FLAGS_DEFAULT' (same for 'METHOD_FLAG_' and'METHOD_FLAGS_DEFAULT').
				bool hardcoded_exc = (i == candidate_len - 1 && ((front_parts[i] == "FLAGS" && parts[i] == "FLAG") || (front_parts[i] == "FLAG" && parts[i] == "FLAGS")));
				if (!hardcoded_exc) {
					break;
				}
			}
		}
		candidate_len = i;

		if (candidate_len == 0) {
			return 0;
		}
	}

	return candidate_len;
}

void BindingsGenerator::_apply_prefix_to_enum_constants(BindingsGenerator::EnumInterface &p_ienum, int p_prefix_length) {
	if (p_prefix_length > 0) {
		for (List<ConstantInterface>::Element *E = p_ienum.constants.front(); E; E = E->next()) {
			int curr_prefix_length = p_prefix_length;

			ConstantInterface &curr_const = E->get();

			String constant_name = curr_const.name;

			Vector<String> parts = constant_name.split("_", /* p_allow_empty: */ true);

			if (parts.size() <= curr_prefix_length) {
				continue;
			}

			if (parts[curr_prefix_length][0] >= '0' && parts[curr_prefix_length][0] <= '9') {
				// The name of enum constants may begin with a numeric digit when strip from the enum prefix,
				// so we make the prefix for this constant one word shorter in those cases.
				for (curr_prefix_length = curr_prefix_length - 1; curr_prefix_length > 0; curr_prefix_length--) {
					if (parts[curr_prefix_length][0] < '0' || parts[curr_prefix_length][0] > '9') {
						break;
					}
				}
			}

			constant_name = "";
			for (int i = curr_prefix_length; i < parts.size(); i++) {
				if (i > curr_prefix_length) {
					constant_name += "_";
				}
				constant_name += parts[i];
			}

			curr_const.proxy_name = snake_to_pascal_case(constant_name, true);
		}
	}
}

void BindingsGenerator::_generate_method_icalls(const TypeInterface &p_itype) {
	for (const List<MethodInterface>::Element *E = p_itype.methods.front(); E; E = E->next()) {
		const MethodInterface &imethod = E->get();

		if (imethod.is_virtual) {
			continue;
		}

		const TypeInterface *return_type = _get_type_or_placeholder(imethod.return_type);

		String im_sig = "IntPtr " CS_PARAM_METHODBIND ", ";
		String im_unique_sig = imethod.return_type.cname.operator String() + ",IntPtr,IntPtr";

		im_sig += "IntPtr " CS_PARAM_INSTANCE;

		// Get arguments information
		int i = 0;
		for (const List<ArgumentInterface>::Element *F = imethod.arguments.front(); F; F = F->next()) {
			const TypeInterface *arg_type = _get_type_or_placeholder(F->get().type);

			im_sig += ", ";
			im_sig += arg_type->im_type_in;
			im_sig += " arg";
			im_sig += itos(i + 1);

			im_unique_sig += ",";
			im_unique_sig += get_unique_sig(*arg_type);

			i++;
		}

		String im_type_out = return_type->im_type_out;

		if (return_type->ret_as_byref_arg) {
			// Doesn't affect the unique signature
			im_type_out = "void";

			im_sig += ", ";
			im_sig += return_type->im_type_out;
			im_sig += " argRet";

			i++;
		}

		// godot_icall_{argc}_{icallcount}
		String icall_method = ICALL_PREFIX;
		icall_method += itos(imethod.arguments.size());
		icall_method += "_";
		icall_method += itos(method_icalls.size());

		InternalCall im_icall = InternalCall(p_itype.api_type, icall_method, im_type_out, im_sig, im_unique_sig);

		List<InternalCall>::Element *match = method_icalls.find(im_icall);

		if (match) {
			if (p_itype.api_type != ClassDB::API_EDITOR) {
				match->get().editor_only = false;
			}
			method_icalls_map.insert(&E->get(), &match->get());
		} else {
			List<InternalCall>::Element *added = method_icalls.push_back(im_icall);
			method_icalls_map.insert(&E->get(), &added->get());
		}
	}
}

void BindingsGenerator::_generate_global_constants(StringBuilder &p_output) {
	// Constants (in partial GD class)

	p_output.append("\n#pragma warning disable CS1591 // Disable warning: "
					"'Missing XML comment for publicly visible type or member'\n");

	p_output.append("namespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
	p_output.append(INDENT1 "public static partial class " BINDINGS_GLOBAL_SCOPE_CLASS "\n" INDENT1 "{");

	for (const List<ConstantInterface>::Element *E = global_constants.front(); E; E = E->next()) {
		const ConstantInterface &iconstant = E->get();

		if (iconstant.const_doc && iconstant.const_doc->description.size()) {
			String xml_summary = bbcode_to_xml(fix_doc_description(iconstant.const_doc->description), nullptr);
			Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

			if (summary_lines.size()) {
				p_output.append(MEMBER_BEGIN "/// <summary>\n");

				for (int i = 0; i < summary_lines.size(); i++) {
					p_output.append(INDENT2 "/// ");
					p_output.append(summary_lines[i]);
					p_output.append("\n");
				}

				p_output.append(INDENT2 "/// </summary>");
			}
		}

		p_output.append(MEMBER_BEGIN "public const int ");
		p_output.append(iconstant.proxy_name);
		p_output.append(" = ");
		p_output.append(itos(iconstant.value));
		p_output.append(";");
	}

	if (!global_constants.is_empty()) {
		p_output.append("\n");
	}

	p_output.append(INDENT1 CLOSE_BLOCK); // end of GD class

	// Enums

	for (List<EnumInterface>::Element *E = global_enums.front(); E; E = E->next()) {
		const EnumInterface &ienum = E->get();

		CRASH_COND(ienum.constants.is_empty());

		String enum_proxy_name = ienum.cname.operator String();

		bool enum_in_static_class = false;

		if (enum_proxy_name.find(".") > 0) {
			enum_in_static_class = true;
			String enum_class_name = enum_proxy_name.get_slicec('.', 0);
			enum_proxy_name = enum_proxy_name.get_slicec('.', 1);

			CRASH_COND(enum_class_name != "Variant"); // Hard-coded...

			_log("Declaring global enum '%s' inside static class '%s'\n", enum_proxy_name.utf8().get_data(), enum_class_name.utf8().get_data());

			p_output.append("\n" INDENT1 "public static partial class ");
			p_output.append(enum_class_name);
			p_output.append("\n" INDENT1 OPEN_BLOCK);
		}

		p_output.append("\n" INDENT1 "public enum ");
		p_output.append(enum_proxy_name);
		p_output.append("\n" INDENT1 OPEN_BLOCK);

		for (const List<ConstantInterface>::Element *F = ienum.constants.front(); F; F = F->next()) {
			const ConstantInterface &iconstant = F->get();

			if (iconstant.const_doc && iconstant.const_doc->description.size()) {
				String xml_summary = bbcode_to_xml(fix_doc_description(iconstant.const_doc->description), nullptr);
				Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

				if (summary_lines.size()) {
					p_output.append(INDENT2 "/// <summary>\n");

					for (int i = 0; i < summary_lines.size(); i++) {
						p_output.append(INDENT2 "/// ");
						p_output.append(summary_lines[i]);
						p_output.append("\n");
					}

					p_output.append(INDENT2 "/// </summary>\n");
				}
			}

			p_output.append(INDENT2);
			p_output.append(iconstant.proxy_name);
			p_output.append(" = ");
			p_output.append(itos(iconstant.value));
			p_output.append(F != ienum.constants.back() ? ",\n" : "\n");
		}

		p_output.append(INDENT1 CLOSE_BLOCK);

		if (enum_in_static_class) {
			p_output.append(INDENT1 CLOSE_BLOCK);
		}
	}

	p_output.append(CLOSE_BLOCK); // end of namespace

	p_output.append("\n#pragma warning restore CS1591\n");
}

Error BindingsGenerator::generate_cs_core_project(const String &p_proj_dir) {
	ERR_FAIL_COND_V(!initialized, ERR_UNCONFIGURED);

	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);

	if (!DirAccess::exists(p_proj_dir)) {
		Error err = da->make_dir_recursive(p_proj_dir);
		ERR_FAIL_COND_V_MSG(err != OK, ERR_CANT_CREATE, "Cannot create directory '" + p_proj_dir + "'.");
	}

	da->change_dir(p_proj_dir);
	da->make_dir("Generated");
	da->make_dir("Generated/GodotObjects");

	String base_gen_dir = path::join(p_proj_dir, "Generated");
	String godot_objects_gen_dir = path::join(base_gen_dir, "GodotObjects");

	Vector<String> compile_items;

	// Generate source file for global scope constants and enums
	{
		StringBuilder constants_source;
		_generate_global_constants(constants_source);
		String output_file = path::join(base_gen_dir, BINDINGS_GLOBAL_SCOPE_CLASS "_constants.cs");
		Error save_err = _save_file(output_file, constants_source);
		if (save_err != OK) {
			return save_err;
		}

		compile_items.push_back(output_file);
	}

	for (OrderedHashMap<StringName, TypeInterface>::Element E = obj_types.front(); E; E = E.next()) {
		const TypeInterface &itype = E.get();

		if (itype.api_type == ClassDB::API_EDITOR) {
			continue;
		}

		String output_file = path::join(godot_objects_gen_dir, itype.proxy_name + ".cs");
		Error err = _generate_cs_type(itype, output_file);

		if (err == ERR_SKIP) {
			continue;
		}

		if (err != OK) {
			return err;
		}

		compile_items.push_back(output_file);
	}

	// Generate sources from compressed files

	StringBuilder cs_icalls_content;

	cs_icalls_content.append("using System;\n"
							 "using System.Runtime.CompilerServices;\n"
							 "\n");
	cs_icalls_content.append("namespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
	cs_icalls_content.append(INDENT1 "internal static class " BINDINGS_CLASS_NATIVECALLS "\n" INDENT1 "{");

	cs_icalls_content.append(MEMBER_BEGIN "internal static ulong godot_api_hash = ");
	cs_icalls_content.append(String::num_uint64(GDMono::get_singleton()->get_api_core_hash()) + ";\n");
	cs_icalls_content.append(MEMBER_BEGIN "internal static uint bindings_version = ");
	cs_icalls_content.append(String::num_uint64(BINDINGS_GENERATOR_VERSION) + ";\n");
	cs_icalls_content.append(MEMBER_BEGIN "internal static uint cs_glue_version = ");
	cs_icalls_content.append(String::num_uint64(CS_GLUE_VERSION) + ";\n");

#define ADD_INTERNAL_CALL(m_icall)                                                               \
	if (!m_icall.editor_only) {                                                                  \
		cs_icalls_content.append(MEMBER_BEGIN "[MethodImpl(MethodImplOptions.InternalCall)]\n"); \
		cs_icalls_content.append(INDENT2 "internal static extern ");                             \
		cs_icalls_content.append(m_icall.im_type_out + " ");                                     \
		cs_icalls_content.append(m_icall.name + "(");                                            \
		cs_icalls_content.append(m_icall.im_sig + ");\n");                                       \
	}

	for (const List<InternalCall>::Element *E = core_custom_icalls.front(); E; E = E->next()) {
		ADD_INTERNAL_CALL(E->get());
	}
	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next()) {
		ADD_INTERNAL_CALL(E->get());
	}

#undef ADD_INTERNAL_CALL

	cs_icalls_content.append(INDENT1 CLOSE_BLOCK CLOSE_BLOCK);

	String internal_methods_file = path::join(base_gen_dir, BINDINGS_CLASS_NATIVECALLS ".cs");

	Error err = _save_file(internal_methods_file, cs_icalls_content);
	if (err != OK) {
		return err;
	}

	compile_items.push_back(internal_methods_file);

	StringBuilder includes_props_content;
	includes_props_content.append("<Project>\n"
								  "  <ItemGroup>\n");

	for (int i = 0; i < compile_items.size(); i++) {
		String include = path::relative_to(compile_items[i], p_proj_dir).replace("/", "\\");
		includes_props_content.append("    <Compile Include=\"" + include + "\" />\n");
	}

	includes_props_content.append("  </ItemGroup>\n"
								  "</Project>\n");

	String includes_props_file = path::join(base_gen_dir, "GeneratedIncludes.props");

	err = _save_file(includes_props_file, includes_props_content);
	if (err != OK) {
		return err;
	}

	return OK;
}

Error BindingsGenerator::generate_cs_editor_project(const String &p_proj_dir) {
	ERR_FAIL_COND_V(!initialized, ERR_UNCONFIGURED);

	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);

	if (!DirAccess::exists(p_proj_dir)) {
		Error err = da->make_dir_recursive(p_proj_dir);
		ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
	}

	da->change_dir(p_proj_dir);
	da->make_dir("Generated");
	da->make_dir("Generated/GodotObjects");

	String base_gen_dir = path::join(p_proj_dir, "Generated");
	String godot_objects_gen_dir = path::join(base_gen_dir, "GodotObjects");

	Vector<String> compile_items;

	for (OrderedHashMap<StringName, TypeInterface>::Element E = obj_types.front(); E; E = E.next()) {
		const TypeInterface &itype = E.get();

		if (itype.api_type != ClassDB::API_EDITOR) {
			continue;
		}

		String output_file = path::join(godot_objects_gen_dir, itype.proxy_name + ".cs");
		Error err = _generate_cs_type(itype, output_file);

		if (err == ERR_SKIP) {
			continue;
		}

		if (err != OK) {
			return err;
		}

		compile_items.push_back(output_file);
	}

	StringBuilder cs_icalls_content;

	cs_icalls_content.append("using System;\n"
							 "using System.Runtime.CompilerServices;\n"
							 "\n");
	cs_icalls_content.append("namespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
	cs_icalls_content.append(INDENT1 "internal static class " BINDINGS_CLASS_NATIVECALLS_EDITOR "\n" INDENT1 OPEN_BLOCK);

	cs_icalls_content.append(INDENT2 "internal static ulong godot_api_hash = ");
	cs_icalls_content.append(String::num_uint64(GDMono::get_singleton()->get_api_editor_hash()) + ";\n");
	cs_icalls_content.append(INDENT2 "internal static uint bindings_version = ");
	cs_icalls_content.append(String::num_uint64(BINDINGS_GENERATOR_VERSION) + ";\n");
	cs_icalls_content.append(INDENT2 "internal static uint cs_glue_version = ");
	cs_icalls_content.append(String::num_uint64(CS_GLUE_VERSION) + ";\n");
	cs_icalls_content.append("\n");

#define ADD_INTERNAL_CALL(m_icall)                                                          \
	if (m_icall.editor_only) {                                                              \
		cs_icalls_content.append(INDENT2 "[MethodImpl(MethodImplOptions.InternalCall)]\n"); \
		cs_icalls_content.append(INDENT2 "internal static extern ");                        \
		cs_icalls_content.append(m_icall.im_type_out + " ");                                \
		cs_icalls_content.append(m_icall.name + "(");                                       \
		cs_icalls_content.append(m_icall.im_sig + ");\n");                                  \
	}

	for (const List<InternalCall>::Element *E = editor_custom_icalls.front(); E; E = E->next()) {
		ADD_INTERNAL_CALL(E->get());
	}
	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next()) {
		ADD_INTERNAL_CALL(E->get());
	}

#undef ADD_INTERNAL_CALL

	cs_icalls_content.append(INDENT1 CLOSE_BLOCK CLOSE_BLOCK);

	String internal_methods_file = path::join(base_gen_dir, BINDINGS_CLASS_NATIVECALLS_EDITOR ".cs");

	Error err = _save_file(internal_methods_file, cs_icalls_content);
	if (err != OK) {
		return err;
	}

	compile_items.push_back(internal_methods_file);

	StringBuilder includes_props_content;
	includes_props_content.append("<Project>\n"
								  "  <ItemGroup>\n");

	for (int i = 0; i < compile_items.size(); i++) {
		String include = path::relative_to(compile_items[i], p_proj_dir).replace("/", "\\");
		includes_props_content.append("    <Compile Include=\"" + include + "\" />\n");
	}

	includes_props_content.append("  </ItemGroup>\n"
								  "</Project>\n");

	String includes_props_file = path::join(base_gen_dir, "GeneratedIncludes.props");

	err = _save_file(includes_props_file, includes_props_content);
	if (err != OK) {
		return err;
	}

	return OK;
}

Error BindingsGenerator::generate_cs_api(const String &p_output_dir) {
	ERR_FAIL_COND_V(!initialized, ERR_UNCONFIGURED);

	String output_dir = path::abspath(path::realpath(p_output_dir));

	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);

	if (!DirAccess::exists(output_dir)) {
		Error err = da->make_dir_recursive(output_dir);
		ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
	}

	Error proj_err;

	// Generate GodotSharp source files

	String core_proj_dir = output_dir.plus_file(CORE_API_ASSEMBLY_NAME);

	proj_err = generate_cs_core_project(core_proj_dir);
	if (proj_err != OK) {
		ERR_PRINT("Generation of the Core API C# project failed.");
		return proj_err;
	}

	// Generate GodotSharpEditor source files

	String editor_proj_dir = output_dir.plus_file(EDITOR_API_ASSEMBLY_NAME);

	proj_err = generate_cs_editor_project(editor_proj_dir);
	if (proj_err != OK) {
		ERR_PRINT("Generation of the Editor API C# project failed.");
		return proj_err;
	}

	_log("The Godot API sources were successfully generated\n");

	return OK;
}

// FIXME: There are some members that hide other inherited members.
// - In the case of both members being the same kind, the new one must be declared
// explicitly as 'new' to avoid the warning (and we must print a message about it).
// - In the case of both members being of a different kind, then the new one must
// be renamed to avoid the name collision (and we must print a warning about it).
// - Csc warning e.g.:
// ObjectType/LineEdit.cs(140,38): warning CS0108: 'LineEdit.FocusMode' hides inherited member 'Control.FocusMode'. Use the new keyword if hiding was intended.
Error BindingsGenerator::_generate_cs_type(const TypeInterface &itype, const String &p_output_file) {
	CRASH_COND(!itype.is_object_type);

	bool is_derived_type = itype.base_name != StringName();

	if (!is_derived_type) {
		// Some Godot.Object assertions
		CRASH_COND(itype.cname != name_cache.type_Object);
		CRASH_COND(!itype.is_instantiable);
		CRASH_COND(itype.api_type != ClassDB::API_CORE);
		CRASH_COND(itype.is_reference);
		CRASH_COND(itype.is_singleton);
	}

	List<InternalCall> &custom_icalls = itype.api_type == ClassDB::API_EDITOR ? editor_custom_icalls : core_custom_icalls;

	_log("Generating %s.cs...\n", itype.proxy_name.utf8().get_data());

	String ctor_method(ICALL_PREFIX + itype.proxy_name + "_Ctor"); // Used only for derived types

	StringBuilder output;

	output.append("using System;\n"); // IntPtr
	output.append("using System.Diagnostics;\n"); // DebuggerBrowsable

	output.append("\n"
				  "#pragma warning disable CS1591 // Disable warning: "
				  "'Missing XML comment for publicly visible type or member'\n"
				  "#pragma warning disable CS1573 // Disable warning: "
				  "'Parameter has no matching param tag in the XML comment'\n");

	output.append("\nnamespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);

	const DocData::ClassDoc *class_doc = itype.class_doc;

	if (class_doc && class_doc->description.size()) {
		String xml_summary = bbcode_to_xml(fix_doc_description(class_doc->description), &itype);
		Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

		if (summary_lines.size()) {
			output.append(INDENT1 "/// <summary>\n");

			for (int i = 0; i < summary_lines.size(); i++) {
				output.append(INDENT1 "/// ");
				output.append(summary_lines[i]);
				output.append("\n");
			}

			output.append(INDENT1 "/// </summary>\n");
		}
	}

	output.append(INDENT1 "public ");
	if (itype.is_singleton) {
		output.append("static partial class ");
	} else {
		output.append(itype.is_instantiable ? "partial class " : "abstract partial class ");
	}
	output.append(itype.proxy_name);

	if (itype.is_singleton) {
		output.append("\n");
	} else if (is_derived_type) {
		if (obj_types.has(itype.base_name)) {
			output.append(" : ");
			output.append(obj_types[itype.base_name].proxy_name);
			output.append("\n");
		} else {
			ERR_PRINT("Base type '" + itype.base_name.operator String() + "' does not exist, for class '" + itype.name + "'.");
			return ERR_INVALID_DATA;
		}
	}

	output.append(INDENT1 "{");

	// Add constants

	for (const List<ConstantInterface>::Element *E = itype.constants.front(); E; E = E->next()) {
		const ConstantInterface &iconstant = E->get();

		if (iconstant.const_doc && iconstant.const_doc->description.size()) {
			String xml_summary = bbcode_to_xml(fix_doc_description(iconstant.const_doc->description), &itype);
			Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

			if (summary_lines.size()) {
				output.append(MEMBER_BEGIN "/// <summary>\n");

				for (int i = 0; i < summary_lines.size(); i++) {
					output.append(INDENT2 "/// ");
					output.append(summary_lines[i]);
					output.append("\n");
				}

				output.append(INDENT2 "/// </summary>");
			}
		}

		output.append(MEMBER_BEGIN "public const int ");
		output.append(iconstant.proxy_name);
		output.append(" = ");
		output.append(itos(iconstant.value));
		output.append(";");
	}

	if (itype.constants.size()) {
		output.append("\n");
	}

	// Add enums

	for (const List<EnumInterface>::Element *E = itype.enums.front(); E; E = E->next()) {
		const EnumInterface &ienum = E->get();

		ERR_FAIL_COND_V(ienum.constants.is_empty(), ERR_BUG);

		output.append(MEMBER_BEGIN "public enum ");
		output.append(ienum.cname.operator String());
		output.append(MEMBER_BEGIN OPEN_BLOCK);

		for (const List<ConstantInterface>::Element *F = ienum.constants.front(); F; F = F->next()) {
			const ConstantInterface &iconstant = F->get();

			if (iconstant.const_doc && iconstant.const_doc->description.size()) {
				String xml_summary = bbcode_to_xml(fix_doc_description(iconstant.const_doc->description), &itype);
				Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

				if (summary_lines.size()) {
					output.append(INDENT3 "/// <summary>\n");

					for (int i = 0; i < summary_lines.size(); i++) {
						output.append(INDENT3 "/// ");
						output.append(summary_lines[i]);
						output.append("\n");
					}

					output.append(INDENT3 "/// </summary>\n");
				}
			}

			output.append(INDENT3);
			output.append(iconstant.proxy_name);
			output.append(" = ");
			output.append(itos(iconstant.value));
			output.append(F != ienum.constants.back() ? ",\n" : "\n");
		}

		output.append(INDENT2 CLOSE_BLOCK);
	}

	// Add properties

	for (const List<PropertyInterface>::Element *E = itype.properties.front(); E; E = E->next()) {
		const PropertyInterface &iprop = E->get();
		Error prop_err = _generate_cs_property(itype, iprop, output);
		ERR_FAIL_COND_V_MSG(prop_err != OK, prop_err,
				"Failed to generate property '" + iprop.cname.operator String() +
						"' for class '" + itype.name + "'.");
	}

	if (itype.is_singleton) {
		// Add the type name and the singleton pointer as static fields

		output.append(MEMBER_BEGIN "private static Godot.Object singleton;\n");
		output.append(MEMBER_BEGIN "public static Godot.Object Singleton\n" INDENT2 "{\n" INDENT3
								   "get\n" INDENT3 "{\n" INDENT4 "if (singleton == null)\n" INDENT5
								   "singleton = Engine.GetSingleton(typeof(");
		output.append(itype.proxy_name);
		output.append(").Name);\n" INDENT4 "return singleton;\n" INDENT3 "}\n" INDENT2 "}\n");

		output.append(MEMBER_BEGIN "private static StringName " BINDINGS_NATIVE_NAME_FIELD " = \"");
		output.append(itype.name);
		output.append("\";\n");

		output.append(INDENT2 "internal static IntPtr " BINDINGS_PTR_FIELD " = ");
		output.append(itype.api_type == ClassDB::API_EDITOR ? BINDINGS_CLASS_NATIVECALLS_EDITOR : BINDINGS_CLASS_NATIVECALLS);
		output.append("." ICALL_PREFIX);
		output.append(itype.name);
		output.append(SINGLETON_ICALL_SUFFIX "();\n");
	} else if (is_derived_type) {
		// Add member fields

		output.append(MEMBER_BEGIN "private static StringName " BINDINGS_NATIVE_NAME_FIELD " = \"");
		output.append(itype.name);
		output.append("\";\n");

		// Add default constructor
		if (itype.is_instantiable) {
			output.append(MEMBER_BEGIN "public ");
			output.append(itype.proxy_name);
			output.append("() : this(");
			output.append(itype.memory_own ? "true" : "false");

			// The default constructor may also be called by the engine when instancing existing native objects
			// The engine will initialize the pointer field of the managed side before calling the constructor
			// This is why we only allocate a new native object from the constructor if the pointer field is not set
			output.append(")\n" OPEN_BLOCK_L2 "if (" BINDINGS_PTR_FIELD " == IntPtr.Zero)\n" INDENT4 BINDINGS_PTR_FIELD " = ");
			output.append(itype.api_type == ClassDB::API_EDITOR ? BINDINGS_CLASS_NATIVECALLS_EDITOR : BINDINGS_CLASS_NATIVECALLS);
			output.append("." + ctor_method);
			output.append("(this);\n" INDENT3 "_InitializeGodotScriptInstanceInternals();\n" CLOSE_BLOCK_L2);
		} else {
			// Hide the constructor
			output.append(MEMBER_BEGIN "internal ");
			output.append(itype.proxy_name);
			output.append("() {}\n");
		}

		// Add.. em.. trick constructor. Sort of.
		output.append(MEMBER_BEGIN "internal ");
		output.append(itype.proxy_name);
		output.append("(bool " CS_FIELD_MEMORYOWN ") : base(" CS_FIELD_MEMORYOWN ") {}\n");
	}

	int method_bind_count = 0;
	for (const List<MethodInterface>::Element *E = itype.methods.front(); E; E = E->next()) {
		const MethodInterface &imethod = E->get();
		Error method_err = _generate_cs_method(itype, imethod, method_bind_count, output);
		ERR_FAIL_COND_V_MSG(method_err != OK, method_err,
				"Failed to generate method '" + imethod.name + "' for class '" + itype.name + "'.");
	}

	for (const List<SignalInterface>::Element *E = itype.signals_.front(); E; E = E->next()) {
		const SignalInterface &isignal = E->get();
		Error method_err = _generate_cs_signal(itype, isignal, output);
		ERR_FAIL_COND_V_MSG(method_err != OK, method_err,
				"Failed to generate signal '" + isignal.name + "' for class '" + itype.name + "'.");
	}

	if (itype.is_singleton) {
		InternalCall singleton_icall = InternalCall(itype.api_type, ICALL_PREFIX + itype.name + SINGLETON_ICALL_SUFFIX, "IntPtr");

		if (!find_icall_by_name(singleton_icall.name, custom_icalls)) {
			custom_icalls.push_back(singleton_icall);
		}
	}

	if (is_derived_type && itype.is_instantiable) {
		InternalCall ctor_icall = InternalCall(itype.api_type, ctor_method, "IntPtr", itype.proxy_name + " obj");

		if (!find_icall_by_name(ctor_icall.name, custom_icalls)) {
			custom_icalls.push_back(ctor_icall);
		}
	}

	output.append(INDENT1 CLOSE_BLOCK /* class */
					CLOSE_BLOCK /* namespace */);

	output.append("\n"
				  "#pragma warning restore CS1591\n"
				  "#pragma warning restore CS1573\n");

	return _save_file(p_output_file, output);
}

Error BindingsGenerator::_generate_cs_property(const BindingsGenerator::TypeInterface &p_itype, const PropertyInterface &p_iprop, StringBuilder &p_output) {
	const MethodInterface *setter = p_itype.find_method_by_name(p_iprop.setter);

	// Search it in base types too
	const TypeInterface *current_type = &p_itype;
	while (!setter && current_type->base_name != StringName()) {
		OrderedHashMap<StringName, TypeInterface>::Element base_match = obj_types.find(current_type->base_name);
		ERR_FAIL_COND_V_MSG(!base_match, ERR_BUG, "Type not found '" + current_type->base_name + "'. Inherited by '" + current_type->name + "'.");
		current_type = &base_match.get();
		setter = current_type->find_method_by_name(p_iprop.setter);
	}

	const MethodInterface *getter = p_itype.find_method_by_name(p_iprop.getter);

	// Search it in base types too
	current_type = &p_itype;
	while (!getter && current_type->base_name != StringName()) {
		OrderedHashMap<StringName, TypeInterface>::Element base_match = obj_types.find(current_type->base_name);
		ERR_FAIL_COND_V_MSG(!base_match, ERR_BUG, "Type not found '" + current_type->base_name + "'. Inherited by '" + current_type->name + "'.");
		current_type = &base_match.get();
		getter = current_type->find_method_by_name(p_iprop.getter);
	}

	ERR_FAIL_COND_V(!setter && !getter, ERR_BUG);

	if (setter) {
		int setter_argc = p_iprop.index != -1 ? 2 : 1;
		ERR_FAIL_COND_V(setter->arguments.size() != setter_argc, ERR_BUG);
	}

	if (getter) {
		int getter_argc = p_iprop.index != -1 ? 1 : 0;
		ERR_FAIL_COND_V(getter->arguments.size() != getter_argc, ERR_BUG);
	}

	if (getter && setter) {
		const ArgumentInterface &setter_first_arg = setter->arguments.back()->get();
		if (getter->return_type.cname != setter_first_arg.type.cname) {
			// Special case for Node::set_name
			bool whitelisted = getter->return_type.cname == name_cache.type_StringName &&
							   setter_first_arg.type.cname == name_cache.type_String;

			ERR_FAIL_COND_V_MSG(!whitelisted, ERR_BUG,
					"Return type from getter doesn't match first argument of setter for property: '" +
							p_itype.name + "." + String(p_iprop.cname) + "'.");
		}
	}

	const TypeReference &proptype_name = getter ? getter->return_type : setter->arguments.back()->get().type;

	const TypeInterface *prop_itype = _get_type_or_null(proptype_name);
	ERR_FAIL_NULL_V(prop_itype, ERR_BUG); // Property type not found

	ERR_FAIL_COND_V_MSG(prop_itype->is_singleton, ERR_BUG,
			"Property type is a singleton: '" + p_itype.name + "." + String(p_iprop.cname) + "'.");

	if (p_iprop.prop_doc && p_iprop.prop_doc->description.size()) {
		String xml_summary = bbcode_to_xml(fix_doc_description(p_iprop.prop_doc->description), &p_itype);
		Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

		if (summary_lines.size()) {
			p_output.append(MEMBER_BEGIN "/// <summary>\n");

			for (int i = 0; i < summary_lines.size(); i++) {
				p_output.append(INDENT2 "/// ");
				p_output.append(summary_lines[i]);
				p_output.append("\n");
			}

			p_output.append(INDENT2 "/// </summary>");
		}
	}

	p_output.append(MEMBER_BEGIN "public ");

	if (p_itype.is_singleton) {
		p_output.append("static ");
	}

	p_output.append(prop_itype->cs_type);
	p_output.append(" ");
	p_output.append(p_iprop.proxy_name);
	p_output.append("\n" INDENT2 OPEN_BLOCK);

	if (getter) {
		p_output.append(INDENT3 "get\n"

								// TODO Remove this once we make accessor methods private/internal (they will no longer be marked as obsolete after that)
								"#pragma warning disable CS0618 // Disable warning about obsolete method\n"

				OPEN_BLOCK_L3);

		p_output.append("return ");
		p_output.append(getter->proxy_name + "(");
		if (p_iprop.index != -1) {
			const ArgumentInterface &idx_arg = getter->arguments.front()->get();
			if (idx_arg.type.cname != name_cache.type_int) {
				// Assume the index parameter is an enum
				const TypeInterface *idx_arg_type = _get_type_or_null(idx_arg.type);
				CRASH_COND(idx_arg_type == nullptr);
				p_output.append("(" + idx_arg_type->proxy_name + ")" + itos(p_iprop.index));
			} else {
				p_output.append(itos(p_iprop.index));
			}
		}
		p_output.append(");\n"

				CLOSE_BLOCK_L3

						// TODO Remove this once we make accessor methods private/internal (they will no longer be marked as obsolete after that)
						"#pragma warning restore CS0618\n");
	}

	if (setter) {
		p_output.append(INDENT3 "set\n"

								// TODO Remove this once we make accessor methods private/internal (they will no longer be marked as obsolete after that)
								"#pragma warning disable CS0618 // Disable warning about obsolete method\n"

				OPEN_BLOCK_L3);

		p_output.append(setter->proxy_name + "(");
		if (p_iprop.index != -1) {
			const ArgumentInterface &idx_arg = setter->arguments.front()->get();
			if (idx_arg.type.cname != name_cache.type_int) {
				// Assume the index parameter is an enum
				const TypeInterface *idx_arg_type = _get_type_or_null(idx_arg.type);
				CRASH_COND(idx_arg_type == nullptr);
				p_output.append("(" + idx_arg_type->proxy_name + ")" + itos(p_iprop.index) + ", ");
			} else {
				p_output.append(itos(p_iprop.index) + ", ");
			}
		}
		p_output.append("value);\n"

				CLOSE_BLOCK_L3

						// TODO Remove this once we make accessor methods private/internal (they will no longer be marked as obsolete after that)
						"#pragma warning restore CS0618\n");
	}

	p_output.append(CLOSE_BLOCK_L2);

	return OK;
}

Error BindingsGenerator::_generate_cs_method(const BindingsGenerator::TypeInterface &p_itype, const BindingsGenerator::MethodInterface &p_imethod, int &p_method_bind_count, StringBuilder &p_output) {
	const TypeInterface *return_type = _get_type_or_placeholder(p_imethod.return_type);

	ERR_FAIL_COND_V_MSG(return_type->is_singleton, ERR_BUG,
			"Method return type is a singleton: '" + p_itype.name + "." + p_imethod.name + "'.");

	String method_bind_field = "__method_bind_" + itos(p_method_bind_count);

	String arguments_sig;
	String cs_in_statements;

	String icall_params = method_bind_field + ", ";
	icall_params += sformat(p_itype.cs_in, "this");

	StringBuilder default_args_doc;

	// Retrieve information from the arguments
	for (const List<ArgumentInterface>::Element *F = p_imethod.arguments.front(); F; F = F->next()) {
		const ArgumentInterface &iarg = F->get();
		const TypeInterface *arg_type = _get_type_or_placeholder(iarg.type);

		ERR_FAIL_COND_V_MSG(arg_type->is_singleton, ERR_BUG,
				"Argument type is a singleton: '" + iarg.name + "' of method '" + p_itype.name + "." + p_imethod.name + "'.");

		if (iarg.default_argument.size()) {
			CRASH_COND_MSG(!_arg_default_value_is_assignable_to_type(iarg.def_param_value, *arg_type),
					"Invalid default value for parameter '" + iarg.name + "' of method '" + p_itype.name + "." + p_imethod.name + "'.");
		}

		// Add the current arguments to the signature
		// If the argument has a default value which is not a constant, we will make it Nullable
		{
			if (F != p_imethod.arguments.front()) {
				arguments_sig += ", ";
			}

			if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL) {
				arguments_sig += "Nullable<";
			}

			arguments_sig += arg_type->cs_type;

			if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL) {
				arguments_sig += "> ";
			} else {
				arguments_sig += " ";
			}

			arguments_sig += iarg.name;

			if (iarg.default_argument.size()) {
				if (iarg.def_param_mode != ArgumentInterface::CONSTANT) {
					arguments_sig += " = null";
				} else {
					arguments_sig += " = " + sformat(iarg.default_argument, arg_type->cs_type);
				}
			}
		}

		icall_params += ", ";

		if (iarg.default_argument.size() && iarg.def_param_mode != ArgumentInterface::CONSTANT) {
			// The default value of an argument must be constant. Otherwise we make it Nullable and do the following:
			// Type arg_in = arg.HasValue ? arg.Value : <non-const default value>;
			String arg_in = iarg.name;
			arg_in += "_in";

			cs_in_statements += arg_type->cs_type;
			cs_in_statements += " ";
			cs_in_statements += arg_in;
			cs_in_statements += " = ";
			cs_in_statements += iarg.name;

			if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL) {
				cs_in_statements += ".HasValue ? ";
			} else {
				cs_in_statements += " != null ? ";
			}

			cs_in_statements += iarg.name;

			if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL) {
				cs_in_statements += ".Value : ";
			} else {
				cs_in_statements += " : ";
			}

			String def_arg = sformat(iarg.default_argument, arg_type->cs_type);

			cs_in_statements += def_arg;
			cs_in_statements += ";\n" INDENT3;

			icall_params += arg_type->cs_in.is_empty() ? arg_in : sformat(arg_type->cs_in, arg_in);

			// Apparently the name attribute must not include the @
			String param_tag_name = iarg.name.begins_with("@") ? iarg.name.substr(1, iarg.name.length()) : iarg.name;

			default_args_doc.append(MEMBER_BEGIN "/// <param name=\"" + param_tag_name + "\">If the parameter is null, then the default value is " + def_arg + "</param>");
		} else {
			icall_params += arg_type->cs_in.is_empty() ? iarg.name : sformat(arg_type->cs_in, iarg.name);
		}
	}

	// Generate method
	{
		if (!p_imethod.is_virtual && !p_imethod.requires_object_call) {
			p_output.append(MEMBER_BEGIN "[DebuggerBrowsable(DebuggerBrowsableState.Never)]" MEMBER_BEGIN "private static readonly IntPtr ");
			p_output.append(method_bind_field);
			p_output.append(" = Object." ICALL_GET_METHODBIND "(" BINDINGS_NATIVE_NAME_FIELD ", \"");
			p_output.append(p_imethod.name);
			p_output.append("\");\n");
		}

		if (p_imethod.method_doc && p_imethod.method_doc->description.size()) {
			String xml_summary = bbcode_to_xml(fix_doc_description(p_imethod.method_doc->description), &p_itype);
			Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

			if (summary_lines.size()) {
				p_output.append(MEMBER_BEGIN "/// <summary>\n");

				for (int i = 0; i < summary_lines.size(); i++) {
					p_output.append(INDENT2 "/// ");
					p_output.append(summary_lines[i]);
					p_output.append("\n");
				}

				p_output.append(INDENT2 "/// </summary>");
			}
		}

		if (default_args_doc.get_string_length()) {
			p_output.append(default_args_doc.as_string());
		}

		if (!p_imethod.is_internal) {
			// TODO: This alone adds ~0.2 MB of bloat to the core API assembly. It would be
			// better to generate a table in the C++ glue instead. That way the strings wouldn't
			// add that much extra bloat as they're already used in engine code. Also, it would
			// probably be much faster than looking up the attributes when fetching methods.
			p_output.append(MEMBER_BEGIN "[GodotMethod(\"");
			p_output.append(p_imethod.name);
			p_output.append("\")]");
		}

		if (p_imethod.is_deprecated) {
			if (p_imethod.deprecation_message.is_empty()) {
				WARN_PRINT("An empty deprecation message is discouraged. Method: '" + p_imethod.proxy_name + "'.");
			}

			p_output.append(MEMBER_BEGIN "[Obsolete(\"");
			p_output.append(p_imethod.deprecation_message);
			p_output.append("\")]");
		}

		p_output.append(MEMBER_BEGIN);
		p_output.append(p_imethod.is_internal ? "internal " : "public ");

		if (p_itype.is_singleton) {
			p_output.append("static ");
		} else if (p_imethod.is_virtual) {
			p_output.append("virtual ");
		}

		p_output.append(return_type->cs_type + " ");
		p_output.append(p_imethod.proxy_name + "(");
		p_output.append(arguments_sig + ")\n" OPEN_BLOCK_L2);

		if (p_imethod.is_virtual) {
			// Godot virtual method must be overridden, therefore we return a default value by default.

			if (return_type->cname == name_cache.type_void) {
				p_output.append("return;\n" CLOSE_BLOCK_L2);
			} else {
				p_output.append("return default(");
				p_output.append(return_type->cs_type);
				p_output.append(");\n" CLOSE_BLOCK_L2);
			}

			return OK; // Won't increment method bind count
		}

		if (p_imethod.requires_object_call) {
			// Fallback to Godot's object.Call(string, params)

			p_output.append(CS_METHOD_CALL "(\"");
			p_output.append(p_imethod.name);
			p_output.append("\"");

			for (const List<ArgumentInterface>::Element *F = p_imethod.arguments.front(); F; F = F->next()) {
				p_output.append(", ");
				p_output.append(F->get().name);
			}

			p_output.append(");\n" CLOSE_BLOCK_L2);

			return OK; // Won't increment method bind count
		}

		const Map<const MethodInterface *, const InternalCall *>::Element *match = method_icalls_map.find(&p_imethod);
		ERR_FAIL_NULL_V(match, ERR_BUG);

		const InternalCall *im_icall = match->value();

		String im_call = im_icall->editor_only ? BINDINGS_CLASS_NATIVECALLS_EDITOR : BINDINGS_CLASS_NATIVECALLS;
		im_call += ".";
		im_call += im_icall->name;

		if (p_imethod.arguments.size()) {
			p_output.append(cs_in_statements);
		}

		if (return_type->cname == name_cache.type_void) {
			p_output.append(im_call + "(" + icall_params + ");\n");
		} else if (return_type->cs_out.is_empty()) {
			p_output.append("return " + im_call + "(" + icall_params + ");\n");
		} else {
			p_output.append(sformat(return_type->cs_out, im_call, icall_params, return_type->cs_type, return_type->im_type_out));
			p_output.append("\n");
		}

		p_output.append(CLOSE_BLOCK_L2);
	}

	p_method_bind_count++;

	return OK;
}

Error BindingsGenerator::_generate_cs_signal(const BindingsGenerator::TypeInterface &p_itype, const BindingsGenerator::SignalInterface &p_isignal, StringBuilder &p_output) {
	String arguments_sig;

	// Retrieve information from the arguments
	for (const List<ArgumentInterface>::Element *F = p_isignal.arguments.front(); F; F = F->next()) {
		const ArgumentInterface &iarg = F->get();
		const TypeInterface *arg_type = _get_type_or_placeholder(iarg.type);

		ERR_FAIL_COND_V_MSG(arg_type->is_singleton, ERR_BUG,
				"Argument type is a singleton: '" + iarg.name + "' of signal" + p_itype.name + "." + p_isignal.name + "'.");

		// Add the current arguments to the signature

		if (F != p_isignal.arguments.front()) {
			arguments_sig += ", ";
		}

		arguments_sig += arg_type->cs_type;
		arguments_sig += " ";
		arguments_sig += iarg.name;
	}

	// Generate signal
	{
		if (p_isignal.method_doc && p_isignal.method_doc->description.size()) {
			String xml_summary = bbcode_to_xml(fix_doc_description(p_isignal.method_doc->description), &p_itype);
			Vector<String> summary_lines = xml_summary.length() ? xml_summary.split("\n") : Vector<String>();

			if (summary_lines.size()) {
				p_output.append(MEMBER_BEGIN "/// <summary>\n");

				for (int i = 0; i < summary_lines.size(); i++) {
					p_output.append(INDENT2 "/// ");
					p_output.append(summary_lines[i]);
					p_output.append("\n");
				}

				p_output.append(INDENT2 "/// </summary>");
			}
		}

		if (p_isignal.is_deprecated) {
			if (p_isignal.deprecation_message.is_empty()) {
				WARN_PRINT("An empty deprecation message is discouraged. Signal: '" + p_isignal.proxy_name + "'.");
			}

			p_output.append(MEMBER_BEGIN "[Obsolete(\"");
			p_output.append(p_isignal.deprecation_message);
			p_output.append("\")]");
		}

		String delegate_name = p_isignal.proxy_name;
		delegate_name += "Handler"; // Delegate name is [SignalName]Handler

		// Generate delegate
		p_output.append(MEMBER_BEGIN "public delegate void ");
		p_output.append(delegate_name);
		p_output.append("(");
		p_output.append(arguments_sig);
		p_output.append(");\n");

		// TODO:
		// Could we assume the StringName instance of signal name will never be freed (it's stored in ClassDB) before the managed world is unloaded?
		// If so, we could store the pointer we get from `data_unique_pointer()` instead of allocating StringName here.

		// Cached signal name (StringName)
		p_output.append(MEMBER_BEGIN "[DebuggerBrowsable(DebuggerBrowsableState.Never)]" MEMBER_BEGIN "private static StringName __signal_name_");
		p_output.append(p_isignal.name);
		p_output.append(" = \"");
		p_output.append(p_isignal.name);
		p_output.append("\";\n");

		// Generate event
		p_output.append(MEMBER_BEGIN "[Signal]" MEMBER_BEGIN "public ");

		if (p_itype.is_singleton) {
			p_output.append("static ");
		}

		p_output.append("event ");
		p_output.append(delegate_name);
		p_output.append(" ");
		p_output.append(p_isignal.proxy_name);
		p_output.append("\n" OPEN_BLOCK_L2);

		if (p_itype.is_singleton) {
			p_output.append("add => Singleton.Connect(__signal_name_");
		} else {
			p_output.append("add => Connect(__signal_name_");
		}

		p_output.append(p_isignal.name);
		p_output.append(", new Callable(value));\n");

		if (p_itype.is_singleton) {
			p_output.append(INDENT3 "remove => Singleton.Disconnect(__signal_name_");
		} else {
			p_output.append(INDENT3 "remove => Disconnect(__signal_name_");
		}

		p_output.append(p_isignal.name);
		p_output.append(", new Callable(value));\n");
		p_output.append(CLOSE_BLOCK_L2);
	}

	return OK;
}

Error BindingsGenerator::generate_glue(const String &p_output_dir) {
	ERR_FAIL_COND_V(!initialized, ERR_UNCONFIGURED);

	bool dir_exists = DirAccess::exists(p_output_dir);
	ERR_FAIL_COND_V_MSG(!dir_exists, ERR_FILE_BAD_PATH, "The output directory does not exist.");

	StringBuilder output;

	output.append("/* THIS FILE IS GENERATED DO NOT EDIT */\n");
	output.append("#include \"" GLUE_HEADER_FILE "\"\n");
	output.append("\n#ifdef MONO_GLUE_ENABLED\n");

	generated_icall_funcs.clear();

	for (OrderedHashMap<StringName, TypeInterface>::Element type_elem = obj_types.front(); type_elem; type_elem = type_elem.next()) {
		const TypeInterface &itype = type_elem.get();

		bool is_derived_type = itype.base_name != StringName();

		if (!is_derived_type) {
			// Some Object assertions
			CRASH_COND(itype.cname != name_cache.type_Object);
			CRASH_COND(!itype.is_instantiable);
			CRASH_COND(itype.api_type != ClassDB::API_CORE);
			CRASH_COND(itype.is_singleton);
		}

		List<InternalCall> &custom_icalls = itype.api_type == ClassDB::API_EDITOR ? editor_custom_icalls : core_custom_icalls;

		OS::get_singleton()->print("Generating %s...\n", itype.name.utf8().get_data());

		String ctor_method(ICALL_PREFIX + itype.proxy_name + "_Ctor"); // Used only for derived types

		for (const List<MethodInterface>::Element *E = itype.methods.front(); E; E = E->next()) {
			const MethodInterface &imethod = E->get();
			Error method_err = _generate_glue_method(itype, imethod, output);
			ERR_FAIL_COND_V_MSG(method_err != OK, method_err,
					"Failed to generate method '" + imethod.name + "' for class '" + itype.name + "'.");
		}

		if (itype.is_singleton) {
			String singleton_icall_name = ICALL_PREFIX + itype.name + SINGLETON_ICALL_SUFFIX;
			InternalCall singleton_icall = InternalCall(itype.api_type, singleton_icall_name, "IntPtr");

			if (!find_icall_by_name(singleton_icall.name, custom_icalls)) {
				custom_icalls.push_back(singleton_icall);
			}

			output.append("Object* ");
			output.append(singleton_icall_name);
			output.append("() " OPEN_BLOCK "\treturn Engine::get_singleton()->get_singleton_object(\"");
			output.append(itype.proxy_name);
			output.append("\");\n" CLOSE_BLOCK "\n");
		}

		if (is_derived_type && itype.is_instantiable) {
			InternalCall ctor_icall = InternalCall(itype.api_type, ctor_method, "IntPtr", itype.proxy_name + " obj");

			if (!find_icall_by_name(ctor_icall.name, custom_icalls)) {
				custom_icalls.push_back(ctor_icall);
			}

			output.append("Object* ");
			output.append(ctor_method);
			output.append("(MonoObject* obj) " OPEN_BLOCK
						  "\t" C_MACRO_OBJECT_CONSTRUCT "(instance, \"");
			output.append(itype.name);
			output.append("\");\n"
						  "\t" C_METHOD_TIE_MANAGED_TO_UNMANAGED "(obj, instance);\n"
						  "\treturn instance;\n" CLOSE_BLOCK "\n");
		}
	}

	output.append("namespace GodotSharpBindings\n" OPEN_BLOCK "\n");

	output.append("uint64_t get_core_api_hash() { return ");
	output.append(String::num_uint64(GDMono::get_singleton()->get_api_core_hash()) + "U; }\n");

	output.append("#ifdef TOOLS_ENABLED\n"
				  "uint64_t get_editor_api_hash() { return ");
	output.append(String::num_uint64(GDMono::get_singleton()->get_api_editor_hash()) + "U; }\n");
	output.append("#endif // TOOLS_ENABLED\n");

	output.append("uint32_t get_bindings_version() { return ");
	output.append(String::num_uint64(BINDINGS_GENERATOR_VERSION) + "; }\n");

	output.append("uint32_t get_cs_glue_version() { return ");
	output.append(String::num_uint64(CS_GLUE_VERSION) + "; }\n");

	output.append("\nvoid register_generated_icalls() " OPEN_BLOCK);
	output.append("\tgodot_register_glue_header_icalls();\n");

#define ADD_INTERNAL_CALL_REGISTRATION(m_icall)                                                              \
	{                                                                                                        \
		output.append("\tGDMonoUtils::add_internal_call(");                                                  \
		output.append("\"" BINDINGS_NAMESPACE ".");                                                          \
		output.append(m_icall.editor_only ? BINDINGS_CLASS_NATIVECALLS_EDITOR : BINDINGS_CLASS_NATIVECALLS); \
		output.append("::");                                                                                 \
		output.append(m_icall.name);                                                                         \
		output.append("\", ");                                                                               \
		output.append(m_icall.name);                                                                         \
		output.append(");\n");                                                                               \
	}

	bool tools_sequence = false;
	for (const List<InternalCall>::Element *E = core_custom_icalls.front(); E; E = E->next()) {
		if (tools_sequence) {
			if (!E->get().editor_only) {
				tools_sequence = false;
				output.append("#endif\n");
			}
		} else {
			if (E->get().editor_only) {
				output.append("#ifdef TOOLS_ENABLED\n");
				tools_sequence = true;
			}
		}

		ADD_INTERNAL_CALL_REGISTRATION(E->get());
	}

	if (tools_sequence) {
		tools_sequence = false;
		output.append("#endif\n");
	}

	output.append("#ifdef TOOLS_ENABLED\n");
	for (const List<InternalCall>::Element *E = editor_custom_icalls.front(); E; E = E->next())
		ADD_INTERNAL_CALL_REGISTRATION(E->get());
	output.append("#endif // TOOLS_ENABLED\n");

	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next()) {
		if (tools_sequence) {
			if (!E->get().editor_only) {
				tools_sequence = false;
				output.append("#endif\n");
			}
		} else {
			if (E->get().editor_only) {
				output.append("#ifdef TOOLS_ENABLED\n");
				tools_sequence = true;
			}
		}

		ADD_INTERNAL_CALL_REGISTRATION(E->get());
	}

	if (tools_sequence) {
		tools_sequence = false;
		output.append("#endif\n");
	}

#undef ADD_INTERNAL_CALL_REGISTRATION

	output.append(CLOSE_BLOCK "\n} // namespace GodotSharpBindings\n");

	output.append("\n#endif // MONO_GLUE_ENABLED\n");

	Error save_err = _save_file(path::join(p_output_dir, "mono_glue.gen.cpp"), output);
	if (save_err != OK) {
		return save_err;
	}

	OS::get_singleton()->print("Mono glue generated successfully\n");

	return OK;
}

uint32_t BindingsGenerator::get_version() {
	return BINDINGS_GENERATOR_VERSION;
}

Error BindingsGenerator::_save_file(const String &p_path, const StringBuilder &p_content) {
	FileAccessRef file = FileAccess::open(p_path, FileAccess::WRITE);

	ERR_FAIL_COND_V_MSG(!file, ERR_FILE_CANT_WRITE, "Cannot open file: '" + p_path + "'.");

	file->store_string(p_content.as_string());
	file->close();

	return OK;
}

Error BindingsGenerator::_generate_glue_method(const BindingsGenerator::TypeInterface &p_itype, const BindingsGenerator::MethodInterface &p_imethod, StringBuilder &p_output) {
	if (p_imethod.is_virtual) {
		return OK; // Ignore
	}

	bool ret_void = p_imethod.return_type.cname == name_cache.type_void;

	const TypeInterface *return_type = _get_type_or_placeholder(p_imethod.return_type);

	String argc_str = itos(p_imethod.arguments.size());

	String c_func_sig = "MethodBind* " CS_PARAM_METHODBIND ", " + p_itype.c_type_in + " " CS_PARAM_INSTANCE;
	String c_in_statements;
	String c_args_var_content;

	// Get arguments information
	int i = 0;
	for (const List<ArgumentInterface>::Element *F = p_imethod.arguments.front(); F; F = F->next()) {
		const ArgumentInterface &iarg = F->get();
		const TypeInterface *arg_type = _get_type_or_placeholder(iarg.type);

		String c_param_name = "arg" + itos(i + 1);

		if (p_imethod.is_vararg) {
			if (i < p_imethod.arguments.size() - 1) {
				c_in_statements += sformat(arg_type->c_in.size() ? arg_type->c_in : TypeInterface::DEFAULT_VARARG_C_IN, "Variant", c_param_name);
				c_in_statements += "\t" C_LOCAL_PTRCALL_ARGS ".set(";
				c_in_statements += itos(i);
				c_in_statements += sformat(", &%s_in);\n", c_param_name);
			}
		} else {
			if (i > 0) {
				c_args_var_content += ", ";
			}
			if (arg_type->c_in.size()) {
				c_in_statements += sformat(arg_type->c_in, arg_type->c_type, c_param_name);
			}
			c_args_var_content += sformat(arg_type->c_arg_in, c_param_name);
		}

		c_func_sig += ", ";
		c_func_sig += arg_type->c_type_in;
		c_func_sig += " ";
		c_func_sig += c_param_name;

		i++;
	}

	if (return_type->ret_as_byref_arg) {
		c_func_sig += ", ";
		c_func_sig += return_type->c_type_in;
		c_func_sig += " ";
		c_func_sig += "arg_ret";

		i++;
	}

	const Map<const MethodInterface *, const InternalCall *>::Element *match = method_icalls_map.find(&p_imethod);
	ERR_FAIL_NULL_V(match, ERR_BUG);

	const InternalCall *im_icall = match->value();
	String icall_method = im_icall->name;

	if (!generated_icall_funcs.find(im_icall)) {
		generated_icall_funcs.push_back(im_icall);

		if (im_icall->editor_only) {
			p_output.append("#ifdef TOOLS_ENABLED\n");
		}

		// Generate icall function

		p_output.append((ret_void || return_type->ret_as_byref_arg) ? "void " : return_type->c_type_out + " ");
		p_output.append(icall_method);
		p_output.append("(");
		p_output.append(c_func_sig);
		p_output.append(") " OPEN_BLOCK);

		if (!ret_void) {
			String ptrcall_return_type;
			String initialization;

			if (p_imethod.is_vararg && return_type->cname != name_cache.type_Variant) {
				// VarArg methods always return Variant, but there are some cases in which MethodInfo provides
				// a specific return type. We trust this information is valid. We need a temporary local to keep
				// the Variant alive until the method returns. Otherwise, if the returned Variant holds a RefPtr,
				// it could be deleted too early. This is the case with GDScript.new() which returns OBJECT.
				// Alternatively, we could just return Variant, but that would result in a worse API.
				p_output.append("\tVariant " C_LOCAL_VARARG_RET ";\n");
			}

			if (return_type->is_object_type) {
				ptrcall_return_type = return_type->is_reference ? "Ref<Reference>" : return_type->c_type;
				initialization = return_type->is_reference ? "" : " = nullptr";
			} else {
				ptrcall_return_type = return_type->c_type;
			}

			p_output.append("\t" + ptrcall_return_type);
			p_output.append(" " C_LOCAL_RET);
			p_output.append(initialization + ";\n");

			String fail_ret = return_type->c_type_out.ends_with("*") && !return_type->ret_as_byref_arg ? "nullptr" : return_type->c_type_out + "()";

			if (return_type->ret_as_byref_arg) {
				p_output.append("\tif (" CS_PARAM_INSTANCE " == nullptr) { *arg_ret = ");
				p_output.append(fail_ret);
				p_output.append("; ERR_FAIL_MSG(\"Parameter ' " CS_PARAM_INSTANCE " ' is null.\"); }\n");
			} else {
				p_output.append("\tERR_FAIL_NULL_V(" CS_PARAM_INSTANCE ", ");
				p_output.append(fail_ret);
				p_output.append(");\n");
			}
		} else {
			p_output.append("\tERR_FAIL_NULL(" CS_PARAM_INSTANCE ");\n");
		}

		if (p_imethod.arguments.size()) {
			if (p_imethod.is_vararg) {
				String vararg_arg = "arg" + argc_str;
				String real_argc_str = itos(p_imethod.arguments.size() - 1); // Arguments count without vararg

				p_output.append("\tint vararg_length = mono_array_length(");
				p_output.append(vararg_arg);
				p_output.append(");\n\tint total_length = ");
				p_output.append(real_argc_str);
				p_output.append(" + vararg_length;\n"
								"\tArgumentsVector<Variant> varargs(vararg_length);\n"
								"\tArgumentsVector<const Variant *> " C_LOCAL_PTRCALL_ARGS "(total_length);\n");
				p_output.append(c_in_statements);
				p_output.append("\tfor (int i = 0; i < vararg_length; i++) " OPEN_BLOCK
								"\t\tMonoObject* elem = mono_array_get(");
				p_output.append(vararg_arg);
				p_output.append(", MonoObject*, i);\n"
								"\t\tvarargs.set(i, GDMonoMarshal::mono_object_to_variant(elem));\n"
								"\t\t" C_LOCAL_PTRCALL_ARGS ".set(");
				p_output.append(real_argc_str);
				p_output.append(" + i, &varargs.get(i));\n\t" CLOSE_BLOCK);
			} else {
				p_output.append(c_in_statements);
				p_output.append("\tconst void* " C_LOCAL_PTRCALL_ARGS "[");
				p_output.append(argc_str + "] = { ");
				p_output.append(c_args_var_content + " };\n");
			}
		}

		if (p_imethod.is_vararg) {
			p_output.append("\tCallable::CallError vcall_error;\n\t");

			if (!ret_void) {
				// See the comment on the C_LOCAL_VARARG_RET declaration
				if (return_type->cname != name_cache.type_Variant) {
					p_output.append(C_LOCAL_VARARG_RET " = ");
				} else {
					p_output.append(C_LOCAL_RET " = ");
				}
			}

			p_output.append(CS_PARAM_METHODBIND "->call(" CS_PARAM_INSTANCE ", ");
			p_output.append(p_imethod.arguments.size() ? C_LOCAL_PTRCALL_ARGS ".ptr()" : "nullptr");
			p_output.append(", total_length, vcall_error);\n");

			if (!ret_void) {
				// See the comment on the C_LOCAL_VARARG_RET declaration
				if (return_type->cname != name_cache.type_Variant) {
					p_output.append("\t" C_LOCAL_RET " = " C_LOCAL_VARARG_RET ";\n");
				}
			}
		} else {
			p_output.append("\t" CS_PARAM_METHODBIND "->ptrcall(" CS_PARAM_INSTANCE ", ");
			p_output.append(p_imethod.arguments.size() ? C_LOCAL_PTRCALL_ARGS ", " : "nullptr, ");
			p_output.append(!ret_void ? "&" C_LOCAL_RET ");\n" : "nullptr);\n");
		}

		if (!ret_void) {
			if (return_type->c_out.is_empty()) {
				p_output.append("\treturn " C_LOCAL_RET ";\n");
			} else if (return_type->ret_as_byref_arg) {
				p_output.append(sformat(return_type->c_out, return_type->c_type_out, C_LOCAL_RET, return_type->name, "arg_ret"));
			} else {
				p_output.append(sformat(return_type->c_out, return_type->c_type_out, C_LOCAL_RET, return_type->name));
			}
		}

		p_output.append(CLOSE_BLOCK "\n");

		if (im_icall->editor_only) {
			p_output.append("#endif // TOOLS_ENABLED\n");
		}
	}

	return OK;
}

const BindingsGenerator::TypeInterface *BindingsGenerator::_get_type_or_null(const TypeReference &p_typeref) {
	const Map<StringName, TypeInterface>::Element *builtin_type_match = builtin_types.find(p_typeref.cname);

	if (builtin_type_match) {
		return &builtin_type_match->get();
	}

	const OrderedHashMap<StringName, TypeInterface>::Element obj_type_match = obj_types.find(p_typeref.cname);

	if (obj_type_match) {
		return &obj_type_match.get();
	}

	if (p_typeref.is_enum) {
		const Map<StringName, TypeInterface>::Element *enum_match = enum_types.find(p_typeref.cname);

		if (enum_match) {
			return &enum_match->get();
		}

		// Enum not found. Most likely because none of its constants were bound, so it's empty. That's fine. Use int instead.
		const Map<StringName, TypeInterface>::Element *int_match = builtin_types.find(name_cache.type_int);
		ERR_FAIL_NULL_V(int_match, nullptr);
		return &int_match->get();
	}

	return nullptr;
}

const BindingsGenerator::TypeInterface *BindingsGenerator::_get_type_or_placeholder(const TypeReference &p_typeref) {
	const TypeInterface *found = _get_type_or_null(p_typeref);

	if (found) {
		return found;
	}

	ERR_PRINT(String() + "Type not found. Creating placeholder: '" + p_typeref.cname.operator String() + "'.");

	const Map<StringName, TypeInterface>::Element *match = placeholder_types.find(p_typeref.cname);

	if (match) {
		return &match->get();
	}

	TypeInterface placeholder;
	TypeInterface::create_placeholder_type(placeholder, p_typeref.cname);

	return &placeholder_types.insert(placeholder.cname, placeholder)->get();
}

StringName BindingsGenerator::_get_int_type_name_from_meta(GodotTypeInfo::Metadata p_meta) {
	switch (p_meta) {
		case GodotTypeInfo::METADATA_INT_IS_INT8:
			return "sbyte";
			break;
		case GodotTypeInfo::METADATA_INT_IS_INT16:
			return "short";
			break;
		case GodotTypeInfo::METADATA_INT_IS_INT32:
			return "int";
			break;
		case GodotTypeInfo::METADATA_INT_IS_INT64:
			return "long";
			break;
		case GodotTypeInfo::METADATA_INT_IS_UINT8:
			return "byte";
			break;
		case GodotTypeInfo::METADATA_INT_IS_UINT16:
			return "ushort";
			break;
		case GodotTypeInfo::METADATA_INT_IS_UINT32:
			return "uint";
			break;
		case GodotTypeInfo::METADATA_INT_IS_UINT64:
			return "ulong";
			break;
		default:
			// Assume INT32
			return "int";
	}
}

StringName BindingsGenerator::_get_float_type_name_from_meta(GodotTypeInfo::Metadata p_meta) {
	switch (p_meta) {
		case GodotTypeInfo::METADATA_REAL_IS_FLOAT:
			return "float";
			break;
		case GodotTypeInfo::METADATA_REAL_IS_DOUBLE:
			return "double";
			break;
		default:
			// Assume real_t (float or double depending of REAL_T_IS_DOUBLE)
#ifdef REAL_T_IS_DOUBLE
			return "double";
#else
			return "float";
#endif
	}
}

bool BindingsGenerator::_arg_default_value_is_assignable_to_type(const Variant &p_val, const TypeInterface &p_arg_type) {
	if (p_arg_type.name == name_cache.type_Variant) {
		// Variant can take anything
		return true;
	}

	switch (p_val.get_type()) {
		case Variant::NIL:
			return p_arg_type.is_object_type ||
				   name_cache.is_nullable_type(p_arg_type.name);
		case Variant::BOOL:
			return p_arg_type.name == name_cache.type_bool;
		case Variant::INT:
			return p_arg_type.name == name_cache.type_sbyte ||
				   p_arg_type.name == name_cache.type_short ||
				   p_arg_type.name == name_cache.type_int ||
				   p_arg_type.name == name_cache.type_byte ||
				   p_arg_type.name == name_cache.type_ushort ||
				   p_arg_type.name == name_cache.type_uint ||
				   p_arg_type.name == name_cache.type_long ||
				   p_arg_type.name == name_cache.type_ulong ||
				   p_arg_type.name == name_cache.type_float ||
				   p_arg_type.name == name_cache.type_double ||
				   p_arg_type.is_enum;
		case Variant::FLOAT:
			return p_arg_type.name == name_cache.type_float ||
				   p_arg_type.name == name_cache.type_double;
		case Variant::STRING:
		case Variant::STRING_NAME:
			return p_arg_type.name == name_cache.type_String ||
				   p_arg_type.name == name_cache.type_StringName ||
				   p_arg_type.name == name_cache.type_NodePath;
		case Variant::NODE_PATH:
			return p_arg_type.name == name_cache.type_NodePath;
		case Variant::TRANSFORM:
		case Variant::TRANSFORM2D:
		case Variant::BASIS:
		case Variant::QUAT:
		case Variant::PLANE:
		case Variant::AABB:
		case Variant::COLOR:
		case Variant::VECTOR2:
		case Variant::RECT2:
		case Variant::VECTOR3:
		case Variant::RID:
		case Variant::ARRAY:
		case Variant::DICTIONARY:
		case Variant::PACKED_BYTE_ARRAY:
		case Variant::PACKED_INT32_ARRAY:
		case Variant::PACKED_INT64_ARRAY:
		case Variant::PACKED_FLOAT32_ARRAY:
		case Variant::PACKED_FLOAT64_ARRAY:
		case Variant::PACKED_STRING_ARRAY:
		case Variant::PACKED_VECTOR2_ARRAY:
		case Variant::PACKED_VECTOR3_ARRAY:
		case Variant::PACKED_COLOR_ARRAY:
		case Variant::CALLABLE:
		case Variant::SIGNAL:
			return p_arg_type.name == Variant::get_type_name(p_val.get_type());
		case Variant::OBJECT:
			return p_arg_type.is_object_type;
		case Variant::VECTOR2I:
			return p_arg_type.name == name_cache.type_Vector2 ||
				   p_arg_type.name == Variant::get_type_name(p_val.get_type());
		case Variant::RECT2I:
			return p_arg_type.name == name_cache.type_Rect2 ||
				   p_arg_type.name == Variant::get_type_name(p_val.get_type());
		case Variant::VECTOR3I:
			return p_arg_type.name == name_cache.type_Vector3 ||
				   p_arg_type.name == Variant::get_type_name(p_val.get_type());
		default:
			CRASH_NOW_MSG("Unexpected Variant type: " + itos(p_val.get_type()));
			break;
	}

	return false;
}

bool BindingsGenerator::_populate_object_type_interfaces() {
	obj_types.clear();

	List<StringName> class_list;
	ClassDB::get_class_list(&class_list);
	class_list.sort_custom<StringName::AlphCompare>();

	while (class_list.size()) {
		StringName type_cname = class_list.front()->get();

		ClassDB::APIType api_type = ClassDB::get_api_type(type_cname);

		if (api_type == ClassDB::API_NONE) {
			class_list.pop_front();
			continue;
		}

		if (!ClassDB::is_class_exposed(type_cname)) {
			_log("Ignoring type '%s' because it's not exposed\n", String(type_cname).utf8().get_data());
			class_list.pop_front();
			continue;
		}

		if (!ClassDB::is_class_enabled(type_cname)) {
			_log("Ignoring type '%s' because it's not enabled\n", String(type_cname).utf8().get_data());
			class_list.pop_front();
			continue;
		}

		ClassDB::ClassInfo *class_info = ClassDB::classes.getptr(type_cname);

		TypeInterface itype = TypeInterface::create_object_type(type_cname, api_type);

		itype.base_name = ClassDB::get_parent_class(type_cname);
		itype.is_singleton = Engine::get_singleton()->has_singleton(itype.proxy_name);
		itype.is_instantiable = class_info->creation_func && !itype.is_singleton;
		itype.is_reference = ClassDB::is_parent_class(type_cname, name_cache.type_Reference);
		itype.memory_own = itype.is_reference;

		itype.c_out = "\treturn ";
		itype.c_out += C_METHOD_UNMANAGED_GET_MANAGED;
		itype.c_out += itype.is_reference ? "(%1.ptr());\n" : "(%1);\n";

		itype.cs_in = itype.is_singleton ? BINDINGS_PTR_FIELD : "Object." CS_SMETHOD_GETINSTANCE "(%0)";

		itype.c_type = "Object*";
		itype.c_type_in = itype.c_type;
		itype.c_type_out = "MonoObject*";
		itype.cs_type = itype.proxy_name;
		itype.im_type_in = "IntPtr";
		itype.im_type_out = itype.proxy_name;

		// Populate properties

		List<PropertyInfo> property_list;
		ClassDB::get_property_list(type_cname, &property_list, true);

		Map<StringName, StringName> accessor_methods;

		for (const List<PropertyInfo>::Element *E = property_list.front(); E; E = E->next()) {
			const PropertyInfo &property = E->get();

			if (property.usage & PROPERTY_USAGE_GROUP || property.usage & PROPERTY_USAGE_SUBGROUP || property.usage & PROPERTY_USAGE_CATEGORY) {
				continue;
			}

			if (property.name.find("/") >= 0) {
				// Ignore properties with '/' (slash) in the name. These are only meant for use in the inspector.
				continue;
			}

			PropertyInterface iprop;
			iprop.cname = property.name;
			iprop.setter = ClassDB::get_property_setter(type_cname, iprop.cname);
			iprop.getter = ClassDB::get_property_getter(type_cname, iprop.cname);

			if (iprop.setter != StringName()) {
				accessor_methods[iprop.setter] = iprop.cname;
			}
			if (iprop.getter != StringName()) {
				accessor_methods[iprop.getter] = iprop.cname;
			}

			bool valid = false;
			iprop.index = ClassDB::get_property_index(type_cname, iprop.cname, &valid);
			ERR_FAIL_COND_V_MSG(!valid, false, "Invalid property: '" + itype.name + "." + String(iprop.cname) + "'.");

			iprop.proxy_name = escape_csharp_keyword(snake_to_pascal_case(iprop.cname));

			// Prevent the property and its enclosing type from sharing the same name
			if (iprop.proxy_name == itype.proxy_name) {
				_log("Name of property '%s' is ambiguous with the name of its enclosing class '%s'. Renaming property to '%s_'\n",
						iprop.proxy_name.utf8().get_data(), itype.proxy_name.utf8().get_data(), iprop.proxy_name.utf8().get_data());

				iprop.proxy_name += "_";
			}

			iprop.prop_doc = nullptr;

			for (int i = 0; i < itype.class_doc->properties.size(); i++) {
				const DocData::PropertyDoc &prop_doc = itype.class_doc->properties[i];

				if (prop_doc.name == iprop.cname) {
					iprop.prop_doc = &prop_doc;
					break;
				}
			}

			itype.properties.push_back(iprop);
		}

		// Populate methods

		List<MethodInfo> virtual_method_list;
		ClassDB::get_virtual_methods(type_cname, &virtual_method_list, true);

		List<MethodInfo> method_list;
		ClassDB::get_method_list(type_cname, &method_list, true);
		method_list.sort();

		for (List<MethodInfo>::Element *E = method_list.front(); E; E = E->next()) {
			const MethodInfo &method_info = E->get();

			int argc = method_info.arguments.size();

			if (method_info.name.is_empty()) {
				continue;
			}

			String cname = method_info.name;

			if (blacklisted_methods.find(itype.cname) && blacklisted_methods[itype.cname].find(cname)) {
				continue;
			}

			MethodInterface imethod;
			imethod.name = method_info.name;
			imethod.cname = cname;

			if (method_info.flags & METHOD_FLAG_VIRTUAL) {
				imethod.is_virtual = true;
			}

			PropertyInfo return_info = method_info.return_val;

			MethodBind *m = imethod.is_virtual ? nullptr : ClassDB::get_method(type_cname, method_info.name);

			imethod.is_vararg = m && m->is_vararg();

			if (!m && !imethod.is_virtual) {
				ERR_FAIL_COND_V_MSG(!virtual_method_list.find(method_info), false,
						"Missing MethodBind for non-virtual method: '" + itype.name + "." + imethod.name + "'.");

				// A virtual method without the virtual flag. This is a special case.

				// There is no method bind, so let's fallback to Godot's object.Call(string, params)
				imethod.requires_object_call = true;

				// The method Object.free is registered as a virtual method, but without the virtual flag.
				// This is because this method is not supposed to be overridden, but called.
				// We assume the return type is void.
				imethod.return_type.cname = name_cache.type_void;

				// Actually, more methods like this may be added in the future, which could return
				// something different. Let's put this check to notify us if that ever happens.
				if (itype.cname != name_cache.type_Object || imethod.name != "free") {
					WARN_PRINT("Notification: New unexpected virtual non-overridable method found."
							   " We only expected Object.free, but found '" +
							   itype.name + "." + imethod.name + "'.");
				}
			} else if (return_info.type == Variant::INT && return_info.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
				imethod.return_type.cname = return_info.class_name;
				imethod.return_type.is_enum = true;
			} else if (return_info.class_name != StringName()) {
				imethod.return_type.cname = return_info.class_name;

				bool bad_reference_hint = !imethod.is_virtual && return_info.hint != PROPERTY_HINT_RESOURCE_TYPE &&
										  ClassDB::is_parent_class(return_info.class_name, name_cache.type_Reference);
				ERR_FAIL_COND_V_MSG(bad_reference_hint, false,
						String() + "Return type is reference but hint is not '" _STR(PROPERTY_HINT_RESOURCE_TYPE) "'." +
								" Are you returning a reference type by pointer? Method: '" + itype.name + "." + imethod.name + "'.");
			} else if (return_info.hint == PROPERTY_HINT_RESOURCE_TYPE) {
				imethod.return_type.cname = return_info.hint_string;
			} else if (return_info.type == Variant::NIL && return_info.usage & PROPERTY_USAGE_NIL_IS_VARIANT) {
				imethod.return_type.cname = name_cache.type_Variant;
			} else if (return_info.type == Variant::NIL) {
				imethod.return_type.cname = name_cache.type_void;
			} else {
				if (return_info.type == Variant::INT) {
					imethod.return_type.cname = _get_int_type_name_from_meta(m ? m->get_argument_meta(-1) : GodotTypeInfo::METADATA_NONE);
				} else if (return_info.type == Variant::FLOAT) {
					imethod.return_type.cname = _get_float_type_name_from_meta(m ? m->get_argument_meta(-1) : GodotTypeInfo::METADATA_NONE);
				} else {
					imethod.return_type.cname = Variant::get_type_name(return_info.type);
				}
			}

			for (int i = 0; i < argc; i++) {
				PropertyInfo arginfo = method_info.arguments[i];

				String orig_arg_name = arginfo.name;

				ArgumentInterface iarg;
				iarg.name = orig_arg_name;

				if (arginfo.type == Variant::INT && arginfo.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
					iarg.type.cname = arginfo.class_name;
					iarg.type.is_enum = true;
				} else if (arginfo.class_name != StringName()) {
					iarg.type.cname = arginfo.class_name;
				} else if (arginfo.hint == PROPERTY_HINT_RESOURCE_TYPE) {
					iarg.type.cname = arginfo.hint_string;
				} else if (arginfo.type == Variant::NIL) {
					iarg.type.cname = name_cache.type_Variant;
				} else {
					if (arginfo.type == Variant::INT) {
						iarg.type.cname = _get_int_type_name_from_meta(m ? m->get_argument_meta(i) : GodotTypeInfo::METADATA_NONE);
					} else if (arginfo.type == Variant::FLOAT) {
						iarg.type.cname = _get_float_type_name_from_meta(m ? m->get_argument_meta(i) : GodotTypeInfo::METADATA_NONE);
					} else {
						iarg.type.cname = Variant::get_type_name(arginfo.type);
					}
				}

				iarg.name = escape_csharp_keyword(snake_to_camel_case(iarg.name));

				if (m && m->has_default_argument(i)) {
					bool defval_ok = _arg_default_value_from_variant(m->get_default_argument(i), iarg);
					ERR_FAIL_COND_V_MSG(!defval_ok, false,
							"Cannot determine default value for argument '" + orig_arg_name + "' of method '" + itype.name + "." + imethod.name + "'.");
				}

				imethod.add_argument(iarg);
			}

			if (imethod.is_vararg) {
				ArgumentInterface ivararg;
				ivararg.type.cname = name_cache.type_VarArg;
				ivararg.name = "@args";
				imethod.add_argument(ivararg);
			}

			imethod.proxy_name = escape_csharp_keyword(snake_to_pascal_case(imethod.name));

			// Prevent the method and its enclosing type from sharing the same name
			if (imethod.proxy_name == itype.proxy_name) {
				_log("Name of method '%s' is ambiguous with the name of its enclosing class '%s'. Renaming method to '%s_'\n",
						imethod.proxy_name.utf8().get_data(), itype.proxy_name.utf8().get_data(), imethod.proxy_name.utf8().get_data());

				imethod.proxy_name += "_";
			}

			Map<StringName, StringName>::Element *accessor = accessor_methods.find(imethod.cname);
			if (accessor) {
				const PropertyInterface *accessor_property = itype.find_property_by_name(accessor->value());

				// We only deprecate an accessor method if it's in the same class as the property. It's easier this way, but also
				// we don't know if an accessor method in a different class could have other purposes, so better leave those untouched.
				imethod.is_deprecated = true;
				imethod.deprecation_message = imethod.proxy_name + " is deprecated. Use the " + accessor_property->proxy_name + " property instead.";
			}

			if (itype.class_doc) {
				for (int i = 0; i < itype.class_doc->methods.size(); i++) {
					if (itype.class_doc->methods[i].name == imethod.name) {
						imethod.method_doc = &itype.class_doc->methods[i];
						break;
					}
				}
			}

			ERR_FAIL_COND_V_MSG(itype.find_property_by_name(imethod.cname), false,
					"Method name conflicts with property: '" + itype.name + "." + imethod.name + "'.");

			// Classes starting with an underscore are ignored unless they're used as a property setter or getter
			if (!imethod.is_virtual && imethod.name[0] == '_') {
				for (const List<PropertyInterface>::Element *F = itype.properties.front(); F; F = F->next()) {
					const PropertyInterface &iprop = F->get();

					if (iprop.setter == imethod.name || iprop.getter == imethod.name) {
						imethod.is_internal = true;
						itype.methods.push_back(imethod);
						break;
					}
				}
			} else {
				itype.methods.push_back(imethod);
			}
		}

		// Populate signals

		const HashMap<StringName, MethodInfo> &signal_map = class_info->signal_map;
		const StringName *k = nullptr;

		while ((k = signal_map.next(k))) {
			SignalInterface isignal;

			const MethodInfo &method_info = signal_map.get(*k);

			isignal.name = method_info.name;
			isignal.cname = method_info.name;

			int argc = method_info.arguments.size();

			for (int i = 0; i < argc; i++) {
				PropertyInfo arginfo = method_info.arguments[i];

				String orig_arg_name = arginfo.name;

				ArgumentInterface iarg;
				iarg.name = orig_arg_name;

				if (arginfo.type == Variant::INT && arginfo.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
					iarg.type.cname = arginfo.class_name;
					iarg.type.is_enum = true;
				} else if (arginfo.class_name != StringName()) {
					iarg.type.cname = arginfo.class_name;
				} else if (arginfo.hint == PROPERTY_HINT_RESOURCE_TYPE) {
					iarg.type.cname = arginfo.hint_string;
				} else if (arginfo.type == Variant::NIL) {
					iarg.type.cname = name_cache.type_Variant;
				} else {
					if (arginfo.type == Variant::INT) {
						iarg.type.cname = _get_int_type_name_from_meta(GodotTypeInfo::METADATA_NONE);
					} else if (arginfo.type == Variant::FLOAT) {
						iarg.type.cname = _get_float_type_name_from_meta(GodotTypeInfo::METADATA_NONE);
					} else {
						iarg.type.cname = Variant::get_type_name(arginfo.type);
					}
				}

				iarg.name = escape_csharp_keyword(snake_to_camel_case(iarg.name));

				isignal.add_argument(iarg);
			}

			isignal.proxy_name = escape_csharp_keyword(snake_to_pascal_case(isignal.name));

			// Prevent the signal and its enclosing type from sharing the same name
			if (isignal.proxy_name == itype.proxy_name) {
				_log("Name of signal '%s' is ambiguous with the name of its enclosing class '%s'. Renaming signal to '%s_'\n",
						isignal.proxy_name.utf8().get_data(), itype.proxy_name.utf8().get_data(), isignal.proxy_name.utf8().get_data());

				isignal.proxy_name += "_";
			}

			if (itype.find_property_by_proxy_name(isignal.proxy_name) || itype.find_method_by_proxy_name(isignal.proxy_name)) {
				// ClassDB allows signal names that conflict with method or property names.
				// While registering a signal with a conflicting name is considered wrong,
				// it may still happen and it may take some time until someone fixes the name.
				// We can't allow the bindings to be in a broken state while we wait for a fix;
				// that's why we must handle this possibility by renaming the signal.
				isignal.proxy_name += "Signal";
			}

			if (itype.class_doc) {
				for (int i = 0; i < itype.class_doc->signals.size(); i++) {
					const DocData::MethodDoc &signal_doc = itype.class_doc->signals[i];
					if (signal_doc.name == isignal.name) {
						isignal.method_doc = &signal_doc;
						break;
					}
				}
			}

			itype.signals_.push_back(isignal);
		}

		// Populate enums and constants

		List<String> constants;
		ClassDB::get_integer_constant_list(type_cname, &constants, true);

		const HashMap<StringName, List<StringName>> &enum_map = class_info->enum_map;
		k = nullptr;

		while ((k = enum_map.next(k))) {
			StringName enum_proxy_cname = *k;
			String enum_proxy_name = enum_proxy_cname.operator String();
			if (itype.find_property_by_proxy_name(enum_proxy_cname)) {
				// We have several conflicts between enums and PascalCase properties,
				// so we append 'Enum' to the enum name in those cases.
				enum_proxy_name += "Enum";
				enum_proxy_cname = StringName(enum_proxy_name);
			}
			EnumInterface ienum(enum_proxy_cname);
			const List<StringName> &enum_constants = enum_map.get(*k);
			for (const List<StringName>::Element *E = enum_constants.front(); E; E = E->next()) {
				const StringName &constant_cname = E->get();
				String constant_name = constant_cname.operator String();
				int *value = class_info->constant_map.getptr(constant_cname);
				ERR_FAIL_NULL_V(value, false);
				constants.erase(constant_name);

				ConstantInterface iconstant(constant_name, snake_to_pascal_case(constant_name, true), *value);

				iconstant.const_doc = nullptr;
				for (int i = 0; i < itype.class_doc->constants.size(); i++) {
					const DocData::ConstantDoc &const_doc = itype.class_doc->constants[i];

					if (const_doc.name == iconstant.name) {
						iconstant.const_doc = &const_doc;
						break;
					}
				}

				ienum.constants.push_back(iconstant);
			}

			int prefix_length = _determine_enum_prefix(ienum);

			_apply_prefix_to_enum_constants(ienum, prefix_length);

			itype.enums.push_back(ienum);

			TypeInterface enum_itype;
			enum_itype.is_enum = true;
			enum_itype.name = itype.name + "." + String(*k);
			enum_itype.cname = StringName(enum_itype.name);
			enum_itype.proxy_name = itype.proxy_name + "." + enum_proxy_name;
			TypeInterface::postsetup_enum_type(enum_itype);
			enum_types.insert(enum_itype.cname, enum_itype);
		}

		for (const List<String>::Element *E = constants.front(); E; E = E->next()) {
			const String &constant_name = E->get();
			int *value = class_info->constant_map.getptr(StringName(E->get()));
			ERR_FAIL_NULL_V(value, false);

			ConstantInterface iconstant(constant_name, snake_to_pascal_case(constant_name, true), *value);

			iconstant.const_doc = nullptr;
			for (int i = 0; i < itype.class_doc->constants.size(); i++) {
				const DocData::ConstantDoc &const_doc = itype.class_doc->constants[i];

				if (const_doc.name == iconstant.name) {
					iconstant.const_doc = &const_doc;
					break;
				}
			}

			itype.constants.push_back(iconstant);
		}

		obj_types.insert(itype.cname, itype);

		class_list.pop_front();
	}

	return true;
}

bool BindingsGenerator::_arg_default_value_from_variant(const Variant &p_val, ArgumentInterface &r_iarg) {
	r_iarg.def_param_value = p_val;
	r_iarg.default_argument = p_val.operator String();

	switch (p_val.get_type()) {
		case Variant::NIL:
			// Either Object type or Variant
			r_iarg.default_argument = "null";
			break;
		// Atomic types
		case Variant::BOOL:
			r_iarg.default_argument = bool(p_val) ? "true" : "false";
			break;
		case Variant::INT:
			if (r_iarg.type.cname != name_cache.type_int) {
				r_iarg.default_argument = "(%s)" + r_iarg.default_argument;
			}
			break;
		case Variant::FLOAT:
#ifndef REAL_T_IS_DOUBLE
			r_iarg.default_argument += "f";
#endif
			break;
		case Variant::STRING:
		case Variant::STRING_NAME:
		case Variant::NODE_PATH:
			if (r_iarg.type.cname == name_cache.type_StringName || r_iarg.type.cname == name_cache.type_NodePath) {
				r_iarg.default_argument = "(%s)\"" + r_iarg.default_argument + "\"";
				r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
			} else {
				CRASH_COND(r_iarg.type.cname != name_cache.type_String);
				r_iarg.default_argument = "\"" + r_iarg.default_argument + "\"";
			}
			break;
		case Variant::TRANSFORM:
			if (p_val.operator Transform() == Transform()) {
				r_iarg.default_argument.clear();
			}
			r_iarg.default_argument = "new %s(" + r_iarg.default_argument + ")";
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
			break;
		case Variant::PLANE:
		case Variant::AABB:
		case Variant::COLOR:
			r_iarg.default_argument = "new Color(1, 1, 1, 1)";
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
			break;
		case Variant::VECTOR2:
		case Variant::VECTOR2I:
		case Variant::RECT2:
		case Variant::RECT2I:
		case Variant::VECTOR3:
		case Variant::VECTOR3I:
			r_iarg.default_argument = "new %s" + r_iarg.default_argument;
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
			break;
		case Variant::OBJECT:
			ERR_FAIL_COND_V_MSG(!p_val.is_zero(), false,
					"Parameter of type '" + String(r_iarg.type.cname) + "' can only have null/zero as the default value.");

			r_iarg.default_argument = "null";
			break;
		case Variant::DICTIONARY:
			r_iarg.default_argument = "new %s()";
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
			break;
		case Variant::RID:
			ERR_FAIL_COND_V_MSG(r_iarg.type.cname != name_cache.type_RID, false,
					"Parameter of type '" + String(r_iarg.type.cname) + "' cannot have a default value of type '" + String(name_cache.type_RID) + "'.");

			ERR_FAIL_COND_V_MSG(!p_val.is_zero(), false,
					"Parameter of type '" + String(r_iarg.type.cname) + "' can only have null/zero as the default value.");

			r_iarg.default_argument = "null";
			break;
		case Variant::ARRAY:
		case Variant::PACKED_BYTE_ARRAY:
		case Variant::PACKED_INT32_ARRAY:
		case Variant::PACKED_INT64_ARRAY:
		case Variant::PACKED_FLOAT32_ARRAY:
		case Variant::PACKED_FLOAT64_ARRAY:
		case Variant::PACKED_STRING_ARRAY:
		case Variant::PACKED_VECTOR2_ARRAY:
		case Variant::PACKED_VECTOR3_ARRAY:
		case Variant::PACKED_COLOR_ARRAY:
			r_iarg.default_argument = "new %s {}";
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
			break;
		case Variant::TRANSFORM2D:
		case Variant::BASIS:
		case Variant::QUAT:
			r_iarg.default_argument = Variant::get_type_name(p_val.get_type()) + ".Identity";
			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
			break;
		case Variant::CALLABLE:
		case Variant::SIGNAL:
			CRASH_NOW_MSG("Parameter of type '" + String(r_iarg.type.cname) + "' cannot have a default value.");
			break;
		default:
			CRASH_NOW_MSG("Unexpected Variant type: " + itos(p_val.get_type()));
			break;
	}

	if (r_iarg.def_param_mode == ArgumentInterface::CONSTANT && r_iarg.type.cname == name_cache.type_Variant && r_iarg.default_argument != "null") {
		r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
	}

	return true;
}

void BindingsGenerator::_populate_builtin_type_interfaces() {
	builtin_types.clear();

	TypeInterface itype;

#define INSERT_STRUCT_TYPE(m_type)                                     \
	{                                                                  \
		itype = TypeInterface::create_value_type(String(#m_type));     \
		itype.c_in = "\t%0 %1_in = MARSHALLED_IN(" #m_type ", %1);\n"; \
		itype.c_out = "\t*%3 = MARSHALLED_OUT(" #m_type ", %1);\n";    \
		itype.c_arg_in = "&%s_in";                                     \
		itype.c_type_in = "GDMonoMarshal::M_" #m_type "*";             \
		itype.c_type_out = "GDMonoMarshal::M_" #m_type;                \
		itype.cs_in = "ref %s";                                        \
		/* in cs_out, im_type_out (%3) includes the 'out ' part */     \
		itype.cs_out = "%0(%1, %3 argRet); return argRet;";            \
		itype.im_type_out = "out " + itype.cs_type;                    \
		itype.ret_as_byref_arg = true;                                 \
		builtin_types.insert(itype.cname, itype);                      \
	}

	INSERT_STRUCT_TYPE(Vector2)
	INSERT_STRUCT_TYPE(Vector2i)
	INSERT_STRUCT_TYPE(Rect2)
	INSERT_STRUCT_TYPE(Rect2i)
	INSERT_STRUCT_TYPE(Transform2D)
	INSERT_STRUCT_TYPE(Vector3)
	INSERT_STRUCT_TYPE(Vector3i)
	INSERT_STRUCT_TYPE(Basis)
	INSERT_STRUCT_TYPE(Quat)
	INSERT_STRUCT_TYPE(Transform)
	INSERT_STRUCT_TYPE(AABB)
	INSERT_STRUCT_TYPE(Color)
	INSERT_STRUCT_TYPE(Plane)

#undef INSERT_STRUCT_TYPE

	// bool
	itype = TypeInterface::create_value_type(String("bool"));
	{
		// MonoBoolean <---> bool
		itype.c_in = "\t%0 %1_in = (%0)%1;\n";
		itype.c_out = "\treturn (%0)%1;\n";
		itype.c_type = "bool";
		itype.c_type_in = "MonoBoolean";
		itype.c_type_out = itype.c_type_in;
		itype.c_arg_in = "&%s_in";
	}
	itype.im_type_in = itype.name;
	itype.im_type_out = itype.name;
	builtin_types.insert(itype.cname, itype);

	// Integer types
	{
		// C interface for 'uint32_t' is the same as that of enums. Remember to apply
		// any of the changes done here to 'TypeInterface::postsetup_enum_type' as well.
#define INSERT_INT_TYPE(m_name, m_c_type_in_out, m_c_type)        \
	{                                                             \
		itype = TypeInterface::create_value_type(String(m_name)); \
		{                                                         \
			itype.c_in = "\t%0 %1_in = (%0)%1;\n";                \
			itype.c_out = "\treturn (%0)%1;\n";                   \
			itype.c_type = #m_c_type;                             \
			itype.c_arg_in = "&%s_in";                            \
		}                                                         \
		itype.c_type_in = #m_c_type_in_out;                       \
		itype.c_type_out = itype.c_type_in;                       \
		itype.im_type_in = itype.name;                            \
		itype.im_type_out = itype.name;                           \
		builtin_types.insert(itype.cname, itype);                 \
	}

		// The expected type for all integers in ptrcall is 'int64_t', so that's what we use for 'c_type'

		INSERT_INT_TYPE("sbyte", int8_t, int64_t);
		INSERT_INT_TYPE("short", int16_t, int64_t);
		INSERT_INT_TYPE("int", int32_t, int64_t);
		INSERT_INT_TYPE("long", int64_t, int64_t);
		INSERT_INT_TYPE("byte", uint8_t, int64_t);
		INSERT_INT_TYPE("ushort", uint16_t, int64_t);
		INSERT_INT_TYPE("uint", uint32_t, int64_t);
		INSERT_INT_TYPE("ulong", uint64_t, int64_t);
	}

	// Floating point types
	{
		// float
		itype = TypeInterface();
		itype.name = "float";
		itype.cname = itype.name;
		itype.proxy_name = "float";
		{
			// The expected type for 'float' in ptrcall is 'double'
			itype.c_in = "\t%0 %1_in = (%0)%1;\n";
			itype.c_out = "\treturn (%0)%1;\n";
			itype.c_type = "double";
			itype.c_type_in = "float";
			itype.c_type_out = "float";
			itype.c_arg_in = "&%s_in";
		}
		itype.cs_type = itype.proxy_name;
		itype.im_type_in = itype.proxy_name;
		itype.im_type_out = itype.proxy_name;
		builtin_types.insert(itype.cname, itype);

		// double
		itype = TypeInterface();
		itype.name = "double";
		itype.cname = itype.name;
		itype.proxy_name = "double";
		{
			itype.c_type = "double";
			itype.c_type_in = "double";
			itype.c_type_out = "double";
			itype.c_arg_in = "&%s";
		}
		itype.cs_type = itype.proxy_name;
		itype.im_type_in = itype.proxy_name;
		itype.im_type_out = itype.proxy_name;
		builtin_types.insert(itype.cname, itype);
	}

	// String
	itype = TypeInterface();
	itype.name = "String";
	itype.cname = itype.name;
	itype.proxy_name = "string";
	itype.c_in = "\t%0 %1_in = " C_METHOD_MONOSTR_TO_GODOT "(%1);\n";
	itype.c_out = "\treturn " C_METHOD_MONOSTR_FROM_GODOT "(%1);\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type = itype.name;
	itype.c_type_in = "MonoString*";
	itype.c_type_out = "MonoString*";
	itype.cs_type = itype.proxy_name;
	itype.im_type_in = itype.proxy_name;
	itype.im_type_out = itype.proxy_name;
	builtin_types.insert(itype.cname, itype);

	// StringName
	itype = TypeInterface();
	itype.name = "StringName";
	itype.cname = itype.name;
	itype.proxy_name = "StringName";
	itype.c_in = "\t%0 %1_in = %1 ? *%1 : StringName();\n";
	itype.c_out = "\treturn memnew(StringName(%1));\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type + "*";
	itype.c_type_out = itype.c_type + "*";
	itype.cs_type = itype.proxy_name;
	itype.cs_in = "StringName." CS_SMETHOD_GETINSTANCE "(%0)";
	itype.cs_out = "return new %2(%0(%1));";
	itype.im_type_in = "IntPtr";
	itype.im_type_out = "IntPtr";
	builtin_types.insert(itype.cname, itype);

	// NodePath
	itype = TypeInterface();
	itype.name = "NodePath";
	itype.cname = itype.name;
	itype.proxy_name = "NodePath";
	itype.c_out = "\treturn memnew(NodePath(%1));\n";
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type + "*";
	itype.c_type_out = itype.c_type + "*";
	itype.cs_type = itype.proxy_name;
	itype.cs_in = "NodePath." CS_SMETHOD_GETINSTANCE "(%0)";
	itype.cs_out = "return new %2(%0(%1));";
	itype.im_type_in = "IntPtr";
	itype.im_type_out = "IntPtr";
	builtin_types.insert(itype.cname, itype);

	// RID
	itype = TypeInterface();
	itype.name = "RID";
	itype.cname = itype.name;
	itype.proxy_name = "RID";
	itype.c_out = "\treturn memnew(RID(%1));\n";
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type + "*";
	itype.c_type_out = itype.c_type + "*";
	itype.cs_type = itype.proxy_name;
	itype.cs_in = "RID." CS_SMETHOD_GETINSTANCE "(%0)";
	itype.cs_out = "return new %2(%0(%1));";
	itype.im_type_in = "IntPtr";
	itype.im_type_out = "IntPtr";
	builtin_types.insert(itype.cname, itype);

	// Variant
	itype = TypeInterface();
	itype.name = "Variant";
	itype.cname = itype.name;
	itype.proxy_name = "object";
	itype.c_in = "\t%0 %1_in = " C_METHOD_MANAGED_TO_VARIANT "(%1);\n";
	itype.c_out = "\treturn " C_METHOD_MANAGED_FROM_VARIANT "(%1);\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type = itype.name;
	itype.c_type_in = "MonoObject*";
	itype.c_type_out = "MonoObject*";
	itype.cs_type = itype.proxy_name;
	itype.im_type_in = "object";
	itype.im_type_out = itype.proxy_name;
	builtin_types.insert(itype.cname, itype);

	// Callable
	itype = TypeInterface::create_value_type(String("Callable"));
	itype.c_in = "\t%0 %1_in = " C_METHOD_MANAGED_TO_CALLABLE "(*%1);\n";
	itype.c_out = "\t*%3 = " C_METHOD_MANAGED_FROM_CALLABLE "(%1);\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type_in = "GDMonoMarshal::M_Callable*";
	itype.c_type_out = "GDMonoMarshal::M_Callable";
	itype.cs_in = "ref %s";
	/* in cs_out, im_type_out (%3) includes the 'out ' part */
	itype.cs_out = "%0(%1, %3 argRet); return argRet;";
	itype.im_type_out = "out " + itype.cs_type;
	itype.ret_as_byref_arg = true;
	builtin_types.insert(itype.cname, itype);

	// Signal
	itype = TypeInterface();
	itype.name = "Signal";
	itype.cname = itype.name;
	itype.proxy_name = "SignalInfo";
	itype.c_in = "\t%0 %1_in = " C_METHOD_MANAGED_TO_SIGNAL "(*%1);\n";
	itype.c_out = "\t*%3 = " C_METHOD_MANAGED_FROM_SIGNAL "(%1);\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type = itype.name;
	itype.c_type_in = "GDMonoMarshal::M_SignalInfo*";
	itype.c_type_out = "GDMonoMarshal::M_SignalInfo";
	itype.cs_in = "ref %s";
	/* in cs_out, im_type_out (%3) includes the 'out ' part */
	itype.cs_out = "%0(%1, %3 argRet); return argRet;";
	itype.cs_type = itype.proxy_name;
	itype.im_type_in = "ref " + itype.cs_type;
	itype.im_type_out = "out " + itype.cs_type;
	itype.ret_as_byref_arg = true;
	builtin_types.insert(itype.cname, itype);

	// VarArg (fictitious type to represent variable arguments)
	itype = TypeInterface();
	itype.name = "VarArg";
	itype.cname = itype.name;
	itype.proxy_name = "object[]";
	itype.c_in = "\t%0 %1_in = " C_METHOD_MONOARRAY_TO(Array) "(%1);\n";
	itype.c_arg_in = "&%s_in";
	itype.c_type = "Array";
	itype.c_type_in = "MonoArray*";
	itype.cs_type = "params object[]";
	itype.im_type_in = "object[]";
	builtin_types.insert(itype.cname, itype);

#define INSERT_ARRAY_FULL(m_name, m_type, m_proxy_t)                          \
	{                                                                         \
		itype = TypeInterface();                                              \
		itype.name = #m_name;                                                 \
		itype.cname = itype.name;                                             \
		itype.proxy_name = #m_proxy_t "[]";                                   \
		itype.c_in = "\t%0 %1_in = " C_METHOD_MONOARRAY_TO(m_type) "(%1);\n"; \
		itype.c_out = "\treturn " C_METHOD_MONOARRAY_FROM(m_type) "(%1);\n";  \
		itype.c_arg_in = "&%s_in";                                            \
		itype.c_type = #m_type;                                               \
		itype.c_type_in = "MonoArray*";                                       \
		itype.c_type_out = "MonoArray*";                                      \
		itype.cs_type = itype.proxy_name;                                     \
		itype.im_type_in = itype.proxy_name;                                  \
		itype.im_type_out = itype.proxy_name;                                 \
		builtin_types.insert(itype.name, itype);                              \
	}

#define INSERT_ARRAY(m_type, m_proxy_t) INSERT_ARRAY_FULL(m_type, m_type, m_proxy_t)

	INSERT_ARRAY(PackedInt32Array, int);
	INSERT_ARRAY(PackedInt64Array, long);
	INSERT_ARRAY_FULL(PackedByteArray, PackedByteArray, byte);

	INSERT_ARRAY(PackedFloat32Array, float);
	INSERT_ARRAY(PackedFloat64Array, double);

	INSERT_ARRAY(PackedStringArray, string);

	INSERT_ARRAY(PackedColorArray, Color);
	INSERT_ARRAY(PackedVector2Array, Vector2);
	INSERT_ARRAY(PackedVector3Array, Vector3);

#undef INSERT_ARRAY

	// Array
	itype = TypeInterface();
	itype.name = "Array";
	itype.cname = itype.name;
	itype.proxy_name = itype.name;
	itype.c_out = "\treturn memnew(Array(%1));\n";
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type + "*";
	itype.c_type_out = itype.c_type + "*";
	itype.cs_type = BINDINGS_NAMESPACE_COLLECTIONS "." + itype.proxy_name;
	itype.cs_in = "%0." CS_SMETHOD_GETINSTANCE "()";
	itype.cs_out = "return new " + itype.cs_type + "(%0(%1));";
	itype.im_type_in = "IntPtr";
	itype.im_type_out = "IntPtr";
	builtin_types.insert(itype.cname, itype);

	// Dictionary
	itype = TypeInterface();
	itype.name = "Dictionary";
	itype.cname = itype.name;
	itype.proxy_name = itype.name;
	itype.c_out = "\treturn memnew(Dictionary(%1));\n";
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type + "*";
	itype.c_type_out = itype.c_type + "*";
	itype.cs_type = BINDINGS_NAMESPACE_COLLECTIONS "." + itype.proxy_name;
	itype.cs_in = "%0." CS_SMETHOD_GETINSTANCE "()";
	itype.cs_out = "return new " + itype.cs_type + "(%0(%1));";
	itype.im_type_in = "IntPtr";
	itype.im_type_out = "IntPtr";
	builtin_types.insert(itype.cname, itype);

	// void (fictitious type to represent the return type of methods that do not return anything)
	itype = TypeInterface();
	itype.name = "void";
	itype.cname = itype.name;
	itype.proxy_name = itype.name;
	itype.c_type = itype.name;
	itype.c_type_in = itype.c_type;
	itype.c_type_out = itype.c_type;
	itype.cs_type = itype.proxy_name;
	itype.im_type_in = itype.proxy_name;
	itype.im_type_out = itype.proxy_name;
	builtin_types.insert(itype.cname, itype);
}

void BindingsGenerator::_populate_global_constants() {
	int global_constants_count = CoreConstants::get_global_constant_count();

	if (global_constants_count > 0) {
		Map<String, DocData::ClassDoc>::Element *match = EditorHelp::get_doc_data()->class_list.find("@GlobalScope");

		CRASH_COND_MSG(!match, "Could not find '@GlobalScope' in DocData.");

		const DocData::ClassDoc &global_scope_doc = match->value();

		for (int i = 0; i < global_constants_count; i++) {
			String constant_name = CoreConstants::get_global_constant_name(i);

			const DocData::ConstantDoc *const_doc = nullptr;
			for (int j = 0; j < global_scope_doc.constants.size(); j++) {
				const DocData::ConstantDoc &curr_const_doc = global_scope_doc.constants[j];

				if (curr_const_doc.name == constant_name) {
					const_doc = &curr_const_doc;
					break;
				}
			}

			int constant_value = CoreConstants::get_global_constant_value(i);
			StringName enum_name = CoreConstants::get_global_constant_enum(i);

			ConstantInterface iconstant(constant_name, snake_to_pascal_case(constant_name, true), constant_value);
			iconstant.const_doc = const_doc;

			if (enum_name != StringName()) {
				EnumInterface ienum(enum_name);
				List<EnumInterface>::Element *enum_match = global_enums.find(ienum);
				if (enum_match) {
					enum_match->get().constants.push_back(iconstant);
				} else {
					ienum.constants.push_back(iconstant);
					global_enums.push_back(ienum);
				}
			} else {
				global_constants.push_back(iconstant);
			}
		}

		for (List<EnumInterface>::Element *E = global_enums.front(); E; E = E->next()) {
			EnumInterface &ienum = E->get();

			TypeInterface enum_itype;
			enum_itype.is_enum = true;
			enum_itype.name = ienum.cname.operator String();
			enum_itype.cname = ienum.cname;
			enum_itype.proxy_name = enum_itype.name;
			TypeInterface::postsetup_enum_type(enum_itype);
			enum_types.insert(enum_itype.cname, enum_itype);

			int prefix_length = _determine_enum_prefix(ienum);

			// HARDCODED: The Error enum have the prefix 'ERR_' for everything except 'OK' and 'FAILED'.
			if (ienum.cname == name_cache.enum_Error) {
				if (prefix_length > 0) { // Just in case it ever changes
					ERR_PRINT("Prefix for enum '" _STR(Error) "' is not empty.");
				}

				prefix_length = 1; // 'ERR_'
			}

			_apply_prefix_to_enum_constants(ienum, prefix_length);
		}
	}

	// HARDCODED
	List<StringName> hardcoded_enums;
	hardcoded_enums.push_back("Vector2.Axis");
	hardcoded_enums.push_back("Vector2i.Axis");
	hardcoded_enums.push_back("Vector3.Axis");
	hardcoded_enums.push_back("Vector3i.Axis");
	for (List<StringName>::Element *E = hardcoded_enums.front(); E; E = E->next()) {
		// These enums are not generated and must be written manually (e.g.: Vector3.Axis)
		// Here, we assume core types do not begin with underscore
		TypeInterface enum_itype;
		enum_itype.is_enum = true;
		enum_itype.name = E->get().operator String();
		enum_itype.cname = E->get();
		enum_itype.proxy_name = enum_itype.name;
		TypeInterface::postsetup_enum_type(enum_itype);
		enum_types.insert(enum_itype.cname, enum_itype);
	}
}

void BindingsGenerator::_initialize_blacklisted_methods() {
	blacklisted_methods["Object"].push_back("to_string"); // there is already ToString
	blacklisted_methods["Object"].push_back("_to_string"); // override ToString instead
	blacklisted_methods["Object"].push_back("_init"); // never called in C# (TODO: implement it)
}

void BindingsGenerator::_log(const char *p_format, ...) {
	if (log_print_enabled) {
		va_list list;

		va_start(list, p_format);
		OS::get_singleton()->print("%s", str_format(p_format, list).utf8().get_data());
		va_end(list);
	}
}

void BindingsGenerator::_initialize() {
	initialized = false;

	EditorHelp::generate_doc();

	enum_types.clear();

	_initialize_blacklisted_methods();

	bool obj_type_ok = _populate_object_type_interfaces();
	ERR_FAIL_COND_MSG(!obj_type_ok, "Failed to generate object type interfaces");

	_populate_builtin_type_interfaces();

	_populate_global_constants();

	// Generate internal calls (after populating type interfaces and global constants)

	core_custom_icalls.clear();
	editor_custom_icalls.clear();

	for (OrderedHashMap<StringName, TypeInterface>::Element E = obj_types.front(); E; E = E.next()) {
		_generate_method_icalls(E.get());
	}

	initialized = true;
}

void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args) {
	const int NUM_OPTIONS = 2;
	String generate_all_glue_option = "--generate-mono-glue";
	String generate_cs_glue_option = "--generate-mono-cs-glue";
	String generate_cpp_glue_option = "--generate-mono-cpp-glue";

	String glue_dir_path;
	String cs_dir_path;
	String cpp_dir_path;

	int options_left = NUM_OPTIONS;

	const List<String>::Element *elem = p_cmdline_args.front();

	while (elem && options_left) {
		if (elem->get() == generate_all_glue_option) {
			const List<String>::Element *path_elem = elem->next();

			if (path_elem) {
				glue_dir_path = path_elem->get();
				elem = elem->next();
			} else {
				ERR_PRINT(generate_all_glue_option + ": No output directory specified (expected path to '{GODOT_ROOT}/modules/mono/glue').");
			}

			--options_left;
		} else if (elem->get() == generate_cs_glue_option) {
			const List<String>::Element *path_elem = elem->next();

			if (path_elem) {
				cs_dir_path = path_elem->get();
				elem = elem->next();
			} else {
				ERR_PRINT(generate_cs_glue_option + ": No output directory specified.");
			}

			--options_left;
		} else if (elem->get() == generate_cpp_glue_option) {
			const List<String>::Element *path_elem = elem->next();

			if (path_elem) {
				cpp_dir_path = path_elem->get();
				elem = elem->next();
			} else {
				ERR_PRINT(generate_cpp_glue_option + ": No output directory specified.");
			}

			--options_left;
		}

		elem = elem->next();
	}

	if (glue_dir_path.length() || cs_dir_path.length() || cpp_dir_path.length()) {
		BindingsGenerator bindings_generator;
		bindings_generator.set_log_print_enabled(true);

		if (!bindings_generator.initialized) {
			ERR_PRINT("Failed to initialize the bindings generator");
			::exit(0);
		}

		if (glue_dir_path.length()) {
			if (bindings_generator.generate_glue(glue_dir_path) != OK) {
				ERR_PRINT(generate_all_glue_option + ": Failed to generate the C++ glue.");
			}

			if (bindings_generator.generate_cs_api(glue_dir_path.plus_file(API_SOLUTION_NAME)) != OK) {
				ERR_PRINT(generate_all_glue_option + ": Failed to generate the C# API.");
			}
		}

		if (cs_dir_path.length()) {
			if (bindings_generator.generate_cs_api(cs_dir_path) != OK) {
				ERR_PRINT(generate_cs_glue_option + ": Failed to generate the C# API.");
			}
		}

		if (cpp_dir_path.length()) {
			if (bindings_generator.generate_glue(cpp_dir_path) != OK) {
				ERR_PRINT(generate_cpp_glue_option + ": Failed to generate the C++ glue.");
			}
		}

		// Exit once done
		::exit(0);
	}
}

#endif