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diff --git a/modules/gdscript/gdscript_functions.h b/modules/gdscript/gdscript_functions.h
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+/*************************************************************************/
+/*  gdscript_functions.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 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 GDSCRIPT_FUNCTIONS_H
+#define GDSCRIPT_FUNCTIONS_H
+
+#include "variant.h"
+
+class GDScriptFunctions {
+public:
+	enum Function {
+		MATH_SIN,
+		MATH_COS,
+		MATH_TAN,
+		MATH_SINH,
+		MATH_COSH,
+		MATH_TANH,
+		MATH_ASIN,
+		MATH_ACOS,
+		MATH_ATAN,
+		MATH_ATAN2,
+		MATH_SQRT,
+		MATH_FMOD,
+		MATH_FPOSMOD,
+		MATH_FLOOR,
+		MATH_CEIL,
+		MATH_ROUND,
+		MATH_ABS,
+		MATH_SIGN,
+		MATH_POW,
+		MATH_LOG,
+		MATH_EXP,
+		MATH_ISNAN,
+		MATH_ISINF,
+		MATH_EASE,
+		MATH_DECIMALS,
+		MATH_STEPIFY,
+		MATH_LERP,
+		MATH_INVERSE_LERP,
+		MATH_RANGE_LERP,
+		MATH_DECTIME,
+		MATH_RANDOMIZE,
+		MATH_RAND,
+		MATH_RANDF,
+		MATH_RANDOM,
+		MATH_SEED,
+		MATH_RANDSEED,
+		MATH_DEG2RAD,
+		MATH_RAD2DEG,
+		MATH_LINEAR2DB,
+		MATH_DB2LINEAR,
+		MATH_WRAP,
+		MATH_WRAPF,
+		LOGIC_MAX,
+		LOGIC_MIN,
+		LOGIC_CLAMP,
+		LOGIC_NEAREST_PO2,
+		OBJ_WEAKREF,
+		FUNC_FUNCREF,
+		TYPE_CONVERT,
+		TYPE_OF,
+		TYPE_EXISTS,
+		TEXT_CHAR,
+		TEXT_STR,
+		TEXT_PRINT,
+		TEXT_PRINT_TABBED,
+		TEXT_PRINT_SPACED,
+		TEXT_PRINTERR,
+		TEXT_PRINTRAW,
+		VAR_TO_STR,
+		STR_TO_VAR,
+		VAR_TO_BYTES,
+		BYTES_TO_VAR,
+		GEN_RANGE,
+		RESOURCE_LOAD,
+		INST2DICT,
+		DICT2INST,
+		VALIDATE_JSON,
+		PARSE_JSON,
+		TO_JSON,
+		HASH,
+		COLOR8,
+		COLORN,
+		PRINT_STACK,
+		INSTANCE_FROM_ID,
+		LEN,
+		FUNC_MAX
+
+	};
+
+	static const char *get_func_name(Function p_func);
+	static void call(Function p_func, const Variant **p_args, int p_arg_count, Variant &r_ret, Variant::CallError &r_error);
+	static bool is_deterministic(Function p_func);
+	static MethodInfo get_info(Function p_func);
+};
+
+#endif // GDSCRIPT_FUNCTIONS_H