1503 lines
36 KiB
C++
1503 lines
36 KiB
C++
/*************************************************************************/
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/* visual_script_expression.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "visual_script_expression.h"
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bool VisualScriptExpression::_set(const StringName &p_name, const Variant &p_value) {
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if (String(p_name) == "expression") {
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expression = p_value;
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expression_dirty = true;
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ports_changed_notify();
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return true;
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}
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if (String(p_name) == "out_type") {
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output_type = Variant::Type(int(p_value));
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expression_dirty = true;
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ports_changed_notify();
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return true;
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}
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if (String(p_name) == "sequenced") {
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sequenced = p_value;
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ports_changed_notify();
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return true;
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}
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if (String(p_name) == "input_count") {
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int from = inputs.size();
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inputs.resize(int(p_value));
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for (int i = from; i < inputs.size(); i++) {
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inputs.write[i].name = String::chr('a' + i);
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if (from == 0) {
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inputs.write[i].type = output_type;
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} else {
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inputs.write[i].type = inputs[from - 1].type;
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}
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}
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expression_dirty = true;
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ports_changed_notify();
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_change_notify();
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return true;
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}
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if (String(p_name).begins_with("input_")) {
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int idx = String(p_name).get_slicec('_', 1).get_slicec('/', 0).to_int();
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ERR_FAIL_INDEX_V(idx, inputs.size(), false);
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String what = String(p_name).get_slice("/", 1);
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if (what == "type") {
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inputs.write[idx].type = Variant::Type(int(p_value));
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} else if (what == "name") {
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inputs.write[idx].name = p_value;
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} else {
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return false;
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}
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expression_dirty = true;
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ports_changed_notify();
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return true;
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}
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return false;
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}
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bool VisualScriptExpression::_get(const StringName &p_name, Variant &r_ret) const {
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if (String(p_name) == "expression") {
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r_ret = expression;
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return true;
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}
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if (String(p_name) == "out_type") {
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r_ret = output_type;
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return true;
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}
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if (String(p_name) == "sequenced") {
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r_ret = sequenced;
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return true;
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}
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if (String(p_name) == "input_count") {
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r_ret = inputs.size();
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return true;
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}
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if (String(p_name).begins_with("input_")) {
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int idx = String(p_name).get_slicec('_', 1).get_slicec('/', 0).to_int();
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ERR_FAIL_INDEX_V(idx, inputs.size(), false);
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String what = String(p_name).get_slice("/", 1);
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if (what == "type") {
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r_ret = inputs[idx].type;
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} else if (what == "name") {
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r_ret = inputs[idx].name;
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} else {
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return false;
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}
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return true;
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}
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return false;
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}
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void VisualScriptExpression::_get_property_list(List<PropertyInfo> *p_list) const {
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String argt = "Any";
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for (int i = 1; i < Variant::VARIANT_MAX; i++) {
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argt += "," + Variant::get_type_name(Variant::Type(i));
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}
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p_list->push_back(PropertyInfo(Variant::STRING, "expression", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR));
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p_list->push_back(PropertyInfo(Variant::INT, "out_type", PROPERTY_HINT_ENUM, argt));
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p_list->push_back(PropertyInfo(Variant::INT, "input_count", PROPERTY_HINT_RANGE, "0,64,1"));
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p_list->push_back(PropertyInfo(Variant::BOOL, "sequenced"));
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for (int i = 0; i < inputs.size(); i++) {
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p_list->push_back(PropertyInfo(Variant::INT, "input_" + itos(i) + "/type", PROPERTY_HINT_ENUM, argt));
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p_list->push_back(PropertyInfo(Variant::STRING, "input_" + itos(i) + "/name"));
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}
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}
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int VisualScriptExpression::get_output_sequence_port_count() const {
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return sequenced ? 1 : 0;
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}
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bool VisualScriptExpression::has_input_sequence_port() const {
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return sequenced;
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}
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String VisualScriptExpression::get_output_sequence_port_text(int p_port) const {
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return String();
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}
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int VisualScriptExpression::get_input_value_port_count() const {
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return inputs.size();
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}
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int VisualScriptExpression::get_output_value_port_count() const {
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return 1;
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}
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PropertyInfo VisualScriptExpression::get_input_value_port_info(int p_idx) const {
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return PropertyInfo(inputs[p_idx].type, inputs[p_idx].name);
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}
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PropertyInfo VisualScriptExpression::get_output_value_port_info(int p_idx) const {
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return PropertyInfo(output_type, "result");
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}
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String VisualScriptExpression::get_caption() const {
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return "Expression";
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}
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String VisualScriptExpression::get_text() const {
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return expression;
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}
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Error VisualScriptExpression::_get_token(Token &r_token) {
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while (true) {
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#define GET_CHAR() (str_ofs >= expression.length() ? 0 : expression[str_ofs++])
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CharType cchar = GET_CHAR();
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if (cchar == 0) {
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r_token.type = TK_EOF;
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return OK;
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}
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switch (cchar) {
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case 0: {
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r_token.type = TK_EOF;
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return OK;
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} break;
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case '{': {
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r_token.type = TK_CURLY_BRACKET_OPEN;
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return OK;
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};
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case '}': {
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r_token.type = TK_CURLY_BRACKET_CLOSE;
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return OK;
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};
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case '[': {
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r_token.type = TK_BRACKET_OPEN;
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return OK;
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};
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case ']': {
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r_token.type = TK_BRACKET_CLOSE;
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return OK;
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};
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case '(': {
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r_token.type = TK_PARENTHESIS_OPEN;
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return OK;
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};
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case ')': {
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r_token.type = TK_PARENTHESIS_CLOSE;
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return OK;
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};
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case ',': {
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r_token.type = TK_COMMA;
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return OK;
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};
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case ':': {
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r_token.type = TK_COLON;
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return OK;
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};
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case '.': {
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r_token.type = TK_PERIOD;
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return OK;
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};
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case '=': {
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cchar = GET_CHAR();
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if (cchar == '=') {
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r_token.type = TK_OP_EQUAL;
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} else {
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_set_error("Expected '='");
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r_token.type = TK_ERROR;
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return ERR_PARSE_ERROR;
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}
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return OK;
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};
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case '!': {
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if (expression[str_ofs] == '=') {
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r_token.type = TK_OP_NOT_EQUAL;
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str_ofs++;
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} else {
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r_token.type = TK_OP_NOT;
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}
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return OK;
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};
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case '>': {
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if (expression[str_ofs] == '=') {
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r_token.type = TK_OP_GREATER_EQUAL;
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str_ofs++;
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} else if (expression[str_ofs] == '>') {
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r_token.type = TK_OP_SHIFT_RIGHT;
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str_ofs++;
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} else {
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r_token.type = TK_OP_GREATER;
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}
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return OK;
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};
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case '<': {
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if (expression[str_ofs] == '=') {
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r_token.type = TK_OP_LESS_EQUAL;
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str_ofs++;
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} else if (expression[str_ofs] == '<') {
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r_token.type = TK_OP_SHIFT_LEFT;
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str_ofs++;
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} else {
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r_token.type = TK_OP_LESS;
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}
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return OK;
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};
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case '+': {
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r_token.type = TK_OP_ADD;
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return OK;
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};
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case '-': {
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r_token.type = TK_OP_SUB;
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return OK;
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};
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case '/': {
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r_token.type = TK_OP_DIV;
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return OK;
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};
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case '*': {
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r_token.type = TK_OP_MUL;
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return OK;
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};
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case '%': {
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r_token.type = TK_OP_MOD;
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return OK;
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};
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case '&': {
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if (expression[str_ofs] == '&') {
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r_token.type = TK_OP_AND;
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str_ofs++;
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} else {
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r_token.type = TK_OP_BIT_AND;
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}
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return OK;
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};
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case '|': {
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if (expression[str_ofs] == '|') {
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r_token.type = TK_OP_OR;
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str_ofs++;
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} else {
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r_token.type = TK_OP_BIT_OR;
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}
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return OK;
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};
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case '^': {
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r_token.type = TK_OP_BIT_XOR;
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return OK;
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};
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case '~': {
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r_token.type = TK_OP_BIT_INVERT;
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return OK;
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};
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case '"': {
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String str;
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while (true) {
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CharType ch = GET_CHAR();
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if (ch == 0) {
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_set_error("Unterminated String");
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r_token.type = TK_ERROR;
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return ERR_PARSE_ERROR;
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} else if (ch == '"') {
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break;
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} else if (ch == '\\') {
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//escaped characters...
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CharType next = GET_CHAR();
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if (next == 0) {
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_set_error("Unterminated String");
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r_token.type = TK_ERROR;
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return ERR_PARSE_ERROR;
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}
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CharType res = 0;
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switch (next) {
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case 'b': res = 8; break;
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case 't': res = 9; break;
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case 'n': res = 10; break;
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case 'f': res = 12; break;
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case 'r': res = 13; break;
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case 'u': {
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//hexnumbarh - oct is deprecated
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for (int j = 0; j < 4; j++) {
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CharType c = GET_CHAR();
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if (c == 0) {
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_set_error("Unterminated String");
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r_token.type = TK_ERROR;
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return ERR_PARSE_ERROR;
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}
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if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))) {
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_set_error("Malformed hex constant in string");
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r_token.type = TK_ERROR;
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return ERR_PARSE_ERROR;
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}
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CharType v;
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if (c >= '0' && c <= '9') {
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v = c - '0';
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} else if (c >= 'a' && c <= 'f') {
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v = c - 'a';
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v += 10;
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} else if (c >= 'A' && c <= 'F') {
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v = c - 'A';
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v += 10;
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} else {
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ERR_PRINT("BUG");
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v = 0;
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}
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res <<= 4;
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res |= v;
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}
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} break;
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//case '\"': res='\"'; break;
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//case '\\': res='\\'; break;
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//case '/': res='/'; break;
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default: {
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res = next;
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//r_err_str="Invalid escape sequence";
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//return ERR_PARSE_ERROR;
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} break;
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}
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str += res;
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} else {
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str += ch;
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}
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}
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r_token.type = TK_CONSTANT;
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r_token.value = str;
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return OK;
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} break;
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default: {
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if (cchar <= 32) {
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break;
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}
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if (cchar >= '0' && cchar <= '9') {
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//a number
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String num;
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#define READING_SIGN 0
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#define READING_INT 1
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#define READING_DEC 2
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#define READING_EXP 3
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#define READING_DONE 4
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int reading = READING_INT;
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CharType c = cchar;
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bool exp_sign = false;
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bool exp_beg = false;
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bool is_float = false;
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while (true) {
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switch (reading) {
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case READING_INT: {
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if (c >= '0' && c <= '9') {
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//pass
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} else if (c == '.') {
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reading = READING_DEC;
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is_float = true;
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} else if (c == 'e') {
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reading = READING_EXP;
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} else {
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reading = READING_DONE;
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}
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} break;
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case READING_DEC: {
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if (c >= '0' && c <= '9') {
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} else if (c == 'e') {
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reading = READING_EXP;
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} else {
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reading = READING_DONE;
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}
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} break;
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case READING_EXP: {
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if (c >= '0' && c <= '9') {
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exp_beg = true;
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} else if ((c == '-' || c == '+') && !exp_sign && !exp_beg) {
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if (c == '-')
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is_float = true;
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exp_sign = true;
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} else {
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reading = READING_DONE;
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}
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} break;
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}
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if (reading == READING_DONE)
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break;
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num += String::chr(c);
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c = GET_CHAR();
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}
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str_ofs--;
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r_token.type = TK_CONSTANT;
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if (is_float)
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r_token.value = num.to_double();
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else
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r_token.value = num.to_int();
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return OK;
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} else if ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_') {
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String id;
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bool first = true;
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while ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_' || (!first && cchar >= '0' && cchar <= '9')) {
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id += String::chr(cchar);
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cchar = GET_CHAR();
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first = false;
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}
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str_ofs--; //go back one
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if (id == "in") {
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r_token.type = TK_OP_IN;
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} else if (id == "null") {
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r_token.type = TK_CONSTANT;
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r_token.value = Variant();
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} else if (id == "true") {
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r_token.type = TK_CONSTANT;
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r_token.value = true;
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} else if (id == "false") {
|
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r_token.type = TK_CONSTANT;
|
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r_token.value = false;
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} else if (id == "PI") {
|
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r_token.type = TK_CONSTANT;
|
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r_token.value = Math_PI;
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} else if (id == "TAU") {
|
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r_token.type = TK_CONSTANT;
|
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r_token.value = Math_TAU;
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} else if (id == "INF") {
|
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r_token.type = TK_CONSTANT;
|
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r_token.value = Math_INF;
|
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} else if (id == "NAN") {
|
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r_token.type = TK_CONSTANT;
|
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r_token.value = Math_NAN;
|
|
} else if (id == "not") {
|
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r_token.type = TK_OP_NOT;
|
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} else if (id == "or") {
|
|
r_token.type = TK_OP_OR;
|
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} else if (id == "and") {
|
|
r_token.type = TK_OP_AND;
|
|
} else if (id == "self") {
|
|
r_token.type = TK_SELF;
|
|
} else {
|
|
|
|
for (int i = 0; i < Variant::VARIANT_MAX; i++) {
|
|
if (id == Variant::get_type_name(Variant::Type(i))) {
|
|
r_token.type = TK_BASIC_TYPE;
|
|
r_token.value = i;
|
|
return OK;
|
|
}
|
|
}
|
|
|
|
VisualScriptBuiltinFunc::BuiltinFunc bifunc = VisualScriptBuiltinFunc::find_function(id);
|
|
if (bifunc != VisualScriptBuiltinFunc::FUNC_MAX) {
|
|
r_token.type = TK_BUILTIN_FUNC;
|
|
r_token.value = bifunc;
|
|
return OK;
|
|
}
|
|
|
|
r_token.type = TK_IDENTIFIER;
|
|
r_token.value = id;
|
|
}
|
|
|
|
return OK;
|
|
} else {
|
|
_set_error("Unexpected character.");
|
|
r_token.type = TK_ERROR;
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
r_token.type = TK_ERROR;
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
const char *VisualScriptExpression::token_name[TK_MAX] = {
|
|
"CURLY BRACKET OPEN",
|
|
"CURLY BRACKET CLOSE",
|
|
"BRACKET OPEN",
|
|
"BRACKET CLOSE",
|
|
"PARENTHESIS OPEN",
|
|
"PARENTHESIS CLOSE",
|
|
"IDENTIFIER",
|
|
"BUILTIN FUNC",
|
|
"SELF",
|
|
"CONSTANT",
|
|
"BASIC TYPE",
|
|
"COLON",
|
|
"COMMA",
|
|
"PERIOD",
|
|
"OP IN",
|
|
"OP EQUAL",
|
|
"OP NOT EQUAL",
|
|
"OP LESS",
|
|
"OP LESS EQUAL",
|
|
"OP GREATER",
|
|
"OP GREATER EQUAL",
|
|
"OP AND",
|
|
"OP OR",
|
|
"OP NOT",
|
|
"OP ADD",
|
|
"OP SUB",
|
|
"OP MUL",
|
|
"OP DIV",
|
|
"OP MOD",
|
|
"OP SHIFT LEFT",
|
|
"OP SHIFT RIGHT",
|
|
"OP BIT AND",
|
|
"OP BIT OR",
|
|
"OP BIT XOR",
|
|
"OP BIT INVERT",
|
|
"EOF",
|
|
"ERROR"
|
|
};
|
|
|
|
VisualScriptExpression::ENode *VisualScriptExpression::_parse_expression() {
|
|
|
|
Vector<Expression> expression;
|
|
|
|
while (true) {
|
|
//keep appending stuff to expression
|
|
ENode *expr = NULL;
|
|
|
|
Token tk;
|
|
_get_token(tk);
|
|
if (error_set)
|
|
return NULL;
|
|
|
|
switch (tk.type) {
|
|
case TK_CURLY_BRACKET_OPEN: {
|
|
//a dictionary
|
|
DictionaryNode *dn = alloc_node<DictionaryNode>();
|
|
|
|
while (true) {
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_CURLY_BRACKET_CLOSE) {
|
|
break;
|
|
}
|
|
str_ofs = cofs; //revert
|
|
//parse an expression
|
|
ENode *expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
dn->dict.push_back(expr2);
|
|
|
|
_get_token(tk);
|
|
if (tk.type != TK_COLON) {
|
|
_set_error("Expected ':'");
|
|
return NULL;
|
|
}
|
|
|
|
expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
|
|
dn->dict.push_back(expr2);
|
|
|
|
cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_COMMA) {
|
|
//all good
|
|
} else if (tk.type == TK_CURLY_BRACKET_CLOSE) {
|
|
str_ofs = cofs;
|
|
} else {
|
|
_set_error("Expected ',' or '}'");
|
|
}
|
|
}
|
|
|
|
expr = dn;
|
|
} break;
|
|
case TK_BRACKET_OPEN: {
|
|
//an array
|
|
|
|
ArrayNode *an = alloc_node<ArrayNode>();
|
|
|
|
while (true) {
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_BRACKET_CLOSE) {
|
|
break;
|
|
}
|
|
str_ofs = cofs; //revert
|
|
//parse an expression
|
|
ENode *expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
an->array.push_back(expr2);
|
|
|
|
cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_COMMA) {
|
|
//all good
|
|
} else if (tk.type == TK_BRACKET_CLOSE) {
|
|
str_ofs = cofs;
|
|
} else {
|
|
_set_error("Expected ',' or ']'");
|
|
}
|
|
}
|
|
|
|
expr = an;
|
|
} break;
|
|
case TK_PARENTHESIS_OPEN: {
|
|
//a suexpression
|
|
ENode *e = _parse_expression();
|
|
if (error_set)
|
|
return NULL;
|
|
_get_token(tk);
|
|
if (tk.type != TK_PARENTHESIS_CLOSE) {
|
|
_set_error("Expected ')'");
|
|
return NULL;
|
|
}
|
|
|
|
expr = e;
|
|
|
|
} break;
|
|
case TK_IDENTIFIER: {
|
|
|
|
String what = tk.value;
|
|
int index = -1;
|
|
for (int i = 0; i < inputs.size(); i++) {
|
|
if (what == inputs[i].name) {
|
|
index = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (index != -1) {
|
|
InputNode *input = alloc_node<InputNode>();
|
|
input->index = index;
|
|
expr = input;
|
|
} else {
|
|
_set_error("Invalid input identifier '" + what + "'. For script variables, use self (locals are for inputs)." + what);
|
|
return NULL;
|
|
}
|
|
} break;
|
|
case TK_SELF: {
|
|
|
|
SelfNode *self = alloc_node<SelfNode>();
|
|
expr = self;
|
|
} break;
|
|
case TK_CONSTANT: {
|
|
ConstantNode *constant = alloc_node<ConstantNode>();
|
|
constant->value = tk.value;
|
|
expr = constant;
|
|
} break;
|
|
case TK_BASIC_TYPE: {
|
|
//constructor..
|
|
|
|
Variant::Type bt = Variant::Type(int(tk.value));
|
|
_get_token(tk);
|
|
if (tk.type != TK_PARENTHESIS_OPEN) {
|
|
_set_error("Expected '('");
|
|
return NULL;
|
|
}
|
|
|
|
ConstructorNode *constructor = alloc_node<ConstructorNode>();
|
|
constructor->data_type = bt;
|
|
|
|
while (true) {
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
break;
|
|
}
|
|
str_ofs = cofs; //revert
|
|
//parse an expression
|
|
ENode *expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
|
|
constructor->arguments.push_back(expr2);
|
|
|
|
cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_COMMA) {
|
|
//all good
|
|
} else if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
str_ofs = cofs;
|
|
} else {
|
|
_set_error("Expected ',' or ')'");
|
|
}
|
|
}
|
|
|
|
expr = constructor;
|
|
|
|
} break;
|
|
case TK_BUILTIN_FUNC: {
|
|
//builtin function
|
|
|
|
_get_token(tk);
|
|
if (tk.type != TK_PARENTHESIS_OPEN) {
|
|
_set_error("Expected '('");
|
|
return NULL;
|
|
}
|
|
|
|
BuiltinFuncNode *bifunc = alloc_node<BuiltinFuncNode>();
|
|
bifunc->func = VisualScriptBuiltinFunc::BuiltinFunc(int(tk.value));
|
|
|
|
while (true) {
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
break;
|
|
}
|
|
str_ofs = cofs; //revert
|
|
//parse an expression
|
|
ENode *expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
|
|
bifunc->arguments.push_back(expr2);
|
|
|
|
cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_COMMA) {
|
|
//all good
|
|
} else if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
str_ofs = cofs;
|
|
} else {
|
|
_set_error("Expected ',' or ')'");
|
|
}
|
|
}
|
|
|
|
int expected_args = VisualScriptBuiltinFunc::get_func_argument_count(bifunc->func);
|
|
if (bifunc->arguments.size() != expected_args) {
|
|
_set_error("Builtin func '" + VisualScriptBuiltinFunc::get_func_name(bifunc->func) + "' expects " + itos(expected_args) + " arguments.");
|
|
}
|
|
|
|
expr = bifunc;
|
|
|
|
} break;
|
|
case TK_OP_SUB: {
|
|
|
|
Expression e;
|
|
e.is_op = true;
|
|
e.op = Variant::OP_NEGATE;
|
|
expression.push_back(e);
|
|
continue;
|
|
} break;
|
|
case TK_OP_NOT: {
|
|
|
|
Expression e;
|
|
e.is_op = true;
|
|
e.op = Variant::OP_NOT;
|
|
expression.push_back(e);
|
|
continue;
|
|
} break;
|
|
|
|
default: {
|
|
_set_error("Expected expression.");
|
|
return NULL;
|
|
} break;
|
|
}
|
|
|
|
//before going to operators, must check indexing!
|
|
|
|
while (true) {
|
|
int cofs2 = str_ofs;
|
|
_get_token(tk);
|
|
if (error_set)
|
|
return NULL;
|
|
|
|
bool done = false;
|
|
|
|
switch (tk.type) {
|
|
case TK_BRACKET_OPEN: {
|
|
//value indexing
|
|
|
|
IndexNode *index = alloc_node<IndexNode>();
|
|
index->base = expr;
|
|
|
|
ENode *what = _parse_expression();
|
|
if (!what)
|
|
return NULL;
|
|
|
|
index->index = what;
|
|
|
|
_get_token(tk);
|
|
if (tk.type != TK_BRACKET_CLOSE) {
|
|
_set_error("Expected ']' at end of index.");
|
|
return NULL;
|
|
}
|
|
expr = index;
|
|
|
|
} break;
|
|
case TK_PERIOD: {
|
|
//named indexing or function call
|
|
_get_token(tk);
|
|
if (tk.type != TK_IDENTIFIER) {
|
|
_set_error("Expected identifier after '.'");
|
|
return NULL;
|
|
}
|
|
|
|
StringName identifier = tk.value;
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_PARENTHESIS_OPEN) {
|
|
//function call
|
|
CallNode *func_call = alloc_node<CallNode>();
|
|
func_call->method = identifier;
|
|
func_call->base = expr;
|
|
|
|
while (true) {
|
|
|
|
int cofs3 = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
break;
|
|
}
|
|
str_ofs = cofs3; //revert
|
|
//parse an expression
|
|
ENode *expr2 = _parse_expression();
|
|
if (!expr2)
|
|
return NULL;
|
|
|
|
func_call->arguments.push_back(expr2);
|
|
|
|
cofs3 = str_ofs;
|
|
_get_token(tk);
|
|
if (tk.type == TK_COMMA) {
|
|
//all good
|
|
} else if (tk.type == TK_PARENTHESIS_CLOSE) {
|
|
str_ofs = cofs3;
|
|
} else {
|
|
_set_error("Expected ',' or ')'");
|
|
}
|
|
}
|
|
|
|
expr = func_call;
|
|
} else {
|
|
//named indexing
|
|
str_ofs = cofs;
|
|
|
|
NamedIndexNode *index = alloc_node<NamedIndexNode>();
|
|
index->base = expr;
|
|
index->name = identifier;
|
|
expr = index;
|
|
}
|
|
|
|
} break;
|
|
default: {
|
|
str_ofs = cofs2;
|
|
done = true;
|
|
} break;
|
|
}
|
|
|
|
if (done)
|
|
break;
|
|
}
|
|
|
|
//push expression
|
|
{
|
|
Expression e;
|
|
e.is_op = false;
|
|
e.node = expr;
|
|
expression.push_back(e);
|
|
}
|
|
|
|
//ok finally look for an operator
|
|
|
|
int cofs = str_ofs;
|
|
_get_token(tk);
|
|
if (error_set)
|
|
return NULL;
|
|
|
|
Variant::Operator op = Variant::OP_MAX;
|
|
|
|
switch (tk.type) {
|
|
case TK_OP_IN: op = Variant::OP_IN; break;
|
|
case TK_OP_EQUAL: op = Variant::OP_EQUAL; break;
|
|
case TK_OP_NOT_EQUAL: op = Variant::OP_NOT_EQUAL; break;
|
|
case TK_OP_LESS: op = Variant::OP_LESS; break;
|
|
case TK_OP_LESS_EQUAL: op = Variant::OP_LESS_EQUAL; break;
|
|
case TK_OP_GREATER: op = Variant::OP_GREATER; break;
|
|
case TK_OP_GREATER_EQUAL: op = Variant::OP_GREATER_EQUAL; break;
|
|
case TK_OP_AND: op = Variant::OP_AND; break;
|
|
case TK_OP_OR: op = Variant::OP_OR; break;
|
|
case TK_OP_NOT: op = Variant::OP_NOT; break;
|
|
case TK_OP_ADD: op = Variant::OP_ADD; break;
|
|
case TK_OP_SUB: op = Variant::OP_SUBTRACT; break;
|
|
case TK_OP_MUL: op = Variant::OP_MULTIPLY; break;
|
|
case TK_OP_DIV: op = Variant::OP_DIVIDE; break;
|
|
case TK_OP_MOD: op = Variant::OP_MODULE; break;
|
|
case TK_OP_SHIFT_LEFT: op = Variant::OP_SHIFT_LEFT; break;
|
|
case TK_OP_SHIFT_RIGHT: op = Variant::OP_SHIFT_RIGHT; break;
|
|
case TK_OP_BIT_AND: op = Variant::OP_BIT_AND; break;
|
|
case TK_OP_BIT_OR: op = Variant::OP_BIT_OR; break;
|
|
case TK_OP_BIT_XOR: op = Variant::OP_BIT_XOR; break;
|
|
case TK_OP_BIT_INVERT: op = Variant::OP_BIT_NEGATE; break;
|
|
default: {
|
|
};
|
|
}
|
|
|
|
if (op == Variant::OP_MAX) { //stop appending stuff
|
|
str_ofs = cofs;
|
|
break;
|
|
}
|
|
|
|
//push operator and go on
|
|
{
|
|
Expression e;
|
|
e.is_op = true;
|
|
e.op = op;
|
|
expression.push_back(e);
|
|
}
|
|
}
|
|
|
|
/* Reduce the set set of expressions and place them in an operator tree, respecting precedence */
|
|
|
|
while (expression.size() > 1) {
|
|
|
|
int next_op = -1;
|
|
int min_priority = 0xFFFFF;
|
|
bool is_unary = false;
|
|
|
|
for (int i = 0; i < expression.size(); i++) {
|
|
|
|
if (!expression[i].is_op) {
|
|
|
|
continue;
|
|
}
|
|
|
|
int priority;
|
|
|
|
bool unary = false;
|
|
|
|
switch (expression[i].op) {
|
|
|
|
case Variant::OP_BIT_NEGATE:
|
|
priority = 0;
|
|
unary = true;
|
|
break;
|
|
case Variant::OP_NEGATE:
|
|
priority = 1;
|
|
unary = true;
|
|
break;
|
|
|
|
case Variant::OP_MULTIPLY: priority = 2; break;
|
|
case Variant::OP_DIVIDE: priority = 2; break;
|
|
case Variant::OP_MODULE: priority = 2; break;
|
|
|
|
case Variant::OP_ADD: priority = 3; break;
|
|
case Variant::OP_SUBTRACT: priority = 3; break;
|
|
|
|
case Variant::OP_SHIFT_LEFT: priority = 4; break;
|
|
case Variant::OP_SHIFT_RIGHT: priority = 4; break;
|
|
|
|
case Variant::OP_BIT_AND: priority = 5; break;
|
|
case Variant::OP_BIT_XOR: priority = 6; break;
|
|
case Variant::OP_BIT_OR: priority = 7; break;
|
|
|
|
case Variant::OP_LESS: priority = 8; break;
|
|
case Variant::OP_LESS_EQUAL: priority = 8; break;
|
|
case Variant::OP_GREATER: priority = 8; break;
|
|
case Variant::OP_GREATER_EQUAL: priority = 8; break;
|
|
|
|
case Variant::OP_EQUAL: priority = 8; break;
|
|
case Variant::OP_NOT_EQUAL: priority = 8; break;
|
|
|
|
case Variant::OP_IN: priority = 10; break;
|
|
|
|
case Variant::OP_NOT:
|
|
priority = 11;
|
|
unary = true;
|
|
break;
|
|
case Variant::OP_AND: priority = 12; break;
|
|
case Variant::OP_OR: priority = 13; break;
|
|
|
|
default: {
|
|
_set_error("Parser bug, invalid operator in expression: " + itos(expression[i].op));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (priority < min_priority) {
|
|
// < is used for left to right (default)
|
|
// <= is used for right to left
|
|
|
|
next_op = i;
|
|
min_priority = priority;
|
|
is_unary = unary;
|
|
}
|
|
}
|
|
|
|
if (next_op == -1) {
|
|
|
|
_set_error("Yet another parser bug....");
|
|
ERR_FAIL_V(NULL);
|
|
}
|
|
|
|
// OK! create operator..
|
|
if (is_unary) {
|
|
|
|
int expr_pos = next_op;
|
|
while (expression[expr_pos].is_op) {
|
|
|
|
expr_pos++;
|
|
if (expr_pos == expression.size()) {
|
|
//can happen..
|
|
_set_error("Unexpected end of expression...");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
//consecutively do unary operators
|
|
for (int i = expr_pos - 1; i >= next_op; i--) {
|
|
|
|
OperatorNode *op = alloc_node<OperatorNode>();
|
|
op->op = expression[i].op;
|
|
op->nodes[0] = expression[i + 1].node;
|
|
op->nodes[1] = NULL;
|
|
expression.write[i].is_op = false;
|
|
expression.write[i].node = op;
|
|
expression.remove(i + 1);
|
|
}
|
|
|
|
} else {
|
|
|
|
if (next_op < 1 || next_op >= (expression.size() - 1)) {
|
|
_set_error("Parser bug...");
|
|
ERR_FAIL_V(NULL);
|
|
}
|
|
|
|
OperatorNode *op = alloc_node<OperatorNode>();
|
|
op->op = expression[next_op].op;
|
|
|
|
if (expression[next_op - 1].is_op) {
|
|
|
|
_set_error("Parser bug...");
|
|
ERR_FAIL_V(NULL);
|
|
}
|
|
|
|
if (expression[next_op + 1].is_op) {
|
|
// this is not invalid and can really appear
|
|
// but it becomes invalid anyway because no binary op
|
|
// can be followed by a unary op in a valid combination,
|
|
// due to how precedence works, unaries will always disappear first
|
|
|
|
_set_error("Unexpected two consecutive operators.");
|
|
return NULL;
|
|
}
|
|
|
|
op->nodes[0] = expression[next_op - 1].node; //expression goes as left
|
|
op->nodes[1] = expression[next_op + 1].node; //next expression goes as right
|
|
|
|
//replace all 3 nodes by this operator and make it an expression
|
|
expression.write[next_op - 1].node = op;
|
|
expression.remove(next_op);
|
|
expression.remove(next_op);
|
|
}
|
|
}
|
|
|
|
return expression[0].node;
|
|
}
|
|
|
|
bool VisualScriptExpression::_compile_expression() {
|
|
|
|
if (!expression_dirty)
|
|
return error_set;
|
|
|
|
if (nodes) {
|
|
memdelete(nodes);
|
|
nodes = NULL;
|
|
root = NULL;
|
|
}
|
|
|
|
error_str = String();
|
|
error_set = false;
|
|
str_ofs = 0;
|
|
|
|
root = _parse_expression();
|
|
|
|
if (error_set) {
|
|
root = NULL;
|
|
if (nodes) {
|
|
memdelete(nodes);
|
|
}
|
|
nodes = NULL;
|
|
return true;
|
|
}
|
|
|
|
expression_dirty = false;
|
|
return false;
|
|
}
|
|
|
|
class VisualScriptNodeInstanceExpression : public VisualScriptNodeInstance {
|
|
public:
|
|
VisualScriptInstance *instance;
|
|
VisualScriptExpression *expression;
|
|
|
|
//virtual int get_working_memory_size() const { return 0; }
|
|
//execute by parsing the tree directly
|
|
virtual bool _execute(const Variant **p_inputs, VisualScriptExpression::ENode *p_node, Variant &r_ret, String &r_error_str, Variant::CallError &ce) {
|
|
|
|
switch (p_node->type) {
|
|
case VisualScriptExpression::ENode::TYPE_INPUT: {
|
|
|
|
const VisualScriptExpression::InputNode *in = static_cast<const VisualScriptExpression::InputNode *>(p_node);
|
|
r_ret = *p_inputs[in->index];
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_CONSTANT: {
|
|
|
|
const VisualScriptExpression::ConstantNode *c = static_cast<const VisualScriptExpression::ConstantNode *>(p_node);
|
|
r_ret = c->value;
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_SELF: {
|
|
|
|
r_ret = instance->get_owner_ptr();
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_OPERATOR: {
|
|
|
|
const VisualScriptExpression::OperatorNode *op = static_cast<const VisualScriptExpression::OperatorNode *>(p_node);
|
|
|
|
Variant a;
|
|
bool ret = _execute(p_inputs, op->nodes[0], a, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
Variant b;
|
|
|
|
if (op->nodes[1]) {
|
|
ret = _execute(p_inputs, op->nodes[1], b, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
}
|
|
|
|
bool valid = true;
|
|
Variant::evaluate(op->op, a, b, r_ret, valid);
|
|
if (!valid) {
|
|
r_error_str = "Invalid operands to operator " + Variant::get_operator_name(op->op) + ": " + Variant::get_type_name(a.get_type()) + " and " + Variant::get_type_name(b.get_type()) + ".";
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_INDEX: {
|
|
|
|
const VisualScriptExpression::IndexNode *index = static_cast<const VisualScriptExpression::IndexNode *>(p_node);
|
|
|
|
Variant base;
|
|
bool ret = _execute(p_inputs, index->base, base, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
Variant idx;
|
|
|
|
ret = _execute(p_inputs, index->index, idx, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
bool valid;
|
|
r_ret = base.get(idx, &valid);
|
|
if (!valid) {
|
|
r_error_str = "Invalid index of type " + Variant::get_type_name(idx.get_type()) + " for base of type " + Variant::get_type_name(base.get_type()) + ".";
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_NAMED_INDEX: {
|
|
|
|
const VisualScriptExpression::NamedIndexNode *index = static_cast<const VisualScriptExpression::NamedIndexNode *>(p_node);
|
|
|
|
Variant base;
|
|
bool ret = _execute(p_inputs, index->base, base, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
bool valid;
|
|
r_ret = base.get_named(index->name, &valid);
|
|
if (!valid) {
|
|
r_error_str = "Invalid index '" + String(index->name) + "' for base of type " + Variant::get_type_name(base.get_type()) + ".";
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_ARRAY: {
|
|
const VisualScriptExpression::ArrayNode *array = static_cast<const VisualScriptExpression::ArrayNode *>(p_node);
|
|
|
|
Array arr;
|
|
arr.resize(array->array.size());
|
|
for (int i = 0; i < array->array.size(); i++) {
|
|
|
|
Variant value;
|
|
bool ret = _execute(p_inputs, array->array[i], value, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
arr[i] = value;
|
|
}
|
|
|
|
r_ret = arr;
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_DICTIONARY: {
|
|
const VisualScriptExpression::DictionaryNode *dictionary = static_cast<const VisualScriptExpression::DictionaryNode *>(p_node);
|
|
|
|
Dictionary d;
|
|
for (int i = 0; i < dictionary->dict.size(); i += 2) {
|
|
|
|
Variant key;
|
|
bool ret = _execute(p_inputs, dictionary->dict[i + 0], key, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
Variant value;
|
|
ret = _execute(p_inputs, dictionary->dict[i + 1], value, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
d[key] = value;
|
|
}
|
|
|
|
r_ret = d;
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_CONSTRUCTOR: {
|
|
|
|
const VisualScriptExpression::ConstructorNode *constructor = static_cast<const VisualScriptExpression::ConstructorNode *>(p_node);
|
|
|
|
Vector<Variant> arr;
|
|
Vector<const Variant *> argp;
|
|
arr.resize(constructor->arguments.size());
|
|
argp.resize(constructor->arguments.size());
|
|
|
|
for (int i = 0; i < constructor->arguments.size(); i++) {
|
|
|
|
Variant value;
|
|
bool ret = _execute(p_inputs, constructor->arguments[i], value, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
arr.write[i] = value;
|
|
argp.write[i] = &arr[i];
|
|
}
|
|
|
|
r_ret = Variant::construct(constructor->data_type, (const Variant **)argp.ptr(), argp.size(), ce);
|
|
|
|
if (ce.error != Variant::CallError::CALL_OK) {
|
|
r_error_str = "Invalid arguments to construct '" + Variant::get_type_name(constructor->data_type) + "'.";
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_BUILTIN_FUNC: {
|
|
|
|
const VisualScriptExpression::BuiltinFuncNode *bifunc = static_cast<const VisualScriptExpression::BuiltinFuncNode *>(p_node);
|
|
|
|
Vector<Variant> arr;
|
|
Vector<const Variant *> argp;
|
|
arr.resize(bifunc->arguments.size());
|
|
argp.resize(bifunc->arguments.size());
|
|
|
|
for (int i = 0; i < bifunc->arguments.size(); i++) {
|
|
|
|
Variant value;
|
|
bool ret = _execute(p_inputs, bifunc->arguments[i], value, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
arr.write[i] = value;
|
|
argp.write[i] = &arr[i];
|
|
}
|
|
|
|
VisualScriptBuiltinFunc::exec_func(bifunc->func, (const Variant **)argp.ptr(), &r_ret, ce, r_error_str);
|
|
|
|
if (ce.error != Variant::CallError::CALL_OK) {
|
|
r_error_str = "Builtin Call Failed. " + r_error_str;
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
case VisualScriptExpression::ENode::TYPE_CALL: {
|
|
|
|
const VisualScriptExpression::CallNode *call = static_cast<const VisualScriptExpression::CallNode *>(p_node);
|
|
|
|
Variant base;
|
|
bool ret = _execute(p_inputs, call->base, base, r_error_str, ce);
|
|
if (ret)
|
|
return true;
|
|
|
|
Vector<Variant> arr;
|
|
Vector<const Variant *> argp;
|
|
arr.resize(call->arguments.size());
|
|
argp.resize(call->arguments.size());
|
|
|
|
for (int i = 0; i < call->arguments.size(); i++) {
|
|
|
|
Variant value;
|
|
bool ret2 = _execute(p_inputs, call->arguments[i], value, r_error_str, ce);
|
|
if (ret2)
|
|
return true;
|
|
arr.write[i] = value;
|
|
argp.write[i] = &arr[i];
|
|
}
|
|
|
|
r_ret = base.call(call->method, (const Variant **)argp.ptr(), argp.size(), ce);
|
|
|
|
if (ce.error != Variant::CallError::CALL_OK) {
|
|
r_error_str = "On call to '" + String(call->method) + "':";
|
|
return true;
|
|
}
|
|
|
|
} break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
virtual int step(const Variant **p_inputs, Variant **p_outputs, StartMode p_start_mode, Variant *p_working_mem, Variant::CallError &r_error, String &r_error_str) {
|
|
|
|
if (!expression->root || expression->error_set) {
|
|
r_error_str = expression->error_str;
|
|
r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
|
|
return 0;
|
|
}
|
|
|
|
bool error = _execute(p_inputs, expression->root, *p_outputs[0], r_error_str, r_error);
|
|
if (error && r_error.error == Variant::CallError::CALL_OK) {
|
|
r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
|
|
}
|
|
|
|
#ifdef DEBUG_ENABLED
|
|
if (!error && expression->output_type != Variant::NIL && !Variant::can_convert_strict(p_outputs[0]->get_type(), expression->output_type)) {
|
|
|
|
r_error_str += "Can't convert expression result from " + Variant::get_type_name(p_outputs[0]->get_type()) + " to " + Variant::get_type_name(expression->output_type) + ".";
|
|
r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
VisualScriptNodeInstance *VisualScriptExpression::instance(VisualScriptInstance *p_instance) {
|
|
|
|
_compile_expression();
|
|
VisualScriptNodeInstanceExpression *instance = memnew(VisualScriptNodeInstanceExpression);
|
|
instance->instance = p_instance;
|
|
instance->expression = this;
|
|
return instance;
|
|
}
|
|
|
|
VisualScriptExpression::VisualScriptExpression() {
|
|
output_type = Variant::NIL;
|
|
expression_dirty = true;
|
|
error_set = true;
|
|
root = NULL;
|
|
nodes = NULL;
|
|
sequenced = false;
|
|
}
|
|
|
|
VisualScriptExpression::~VisualScriptExpression() {
|
|
|
|
if (nodes) {
|
|
memdelete(nodes);
|
|
}
|
|
}
|
|
|
|
void register_visual_script_expression_node() {
|
|
|
|
VisualScriptLanguage::singleton->add_register_func("operators/expression", create_node_generic<VisualScriptExpression>);
|
|
}
|