godot/core/string/print_string.h

/*************************************************************************/
/*  print_string.h                                                       */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 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.                */
/*************************************************************************/

#ifndef PRINT_STRING_H
#define PRINT_STRING_H

#include "core/variant/variant.h"

extern void (*_print_func)(String);

typedef void (*PrintHandlerFunc)(void *, const String &p_string, bool p_error);

struct PrintHandlerList {
	PrintHandlerFunc printfunc = nullptr;
	void *userdata = nullptr;

	PrintHandlerList *next = nullptr;

	PrintHandlerList() {}
};

String stringify_variants(Variant p_var);

template <typename... Args>
String stringify_variants(Variant p_var, Args... p_args) {
	return p_var.operator String() + " " + stringify_variants(p_args...);
}

void add_print_handler(PrintHandlerList *p_handler);
void remove_print_handler(PrintHandlerList *p_handler);

extern bool _print_line_enabled;
extern bool _print_error_enabled;
extern void __print_line(String p_string);
extern void print_error(String p_string);
extern void print_verbose(String p_string);
#define print_line(...) __print_line(stringify_variants(__VA_ARGS__))

#endif // PRINT_STRING_H