b1d15c51bc
* Deprecates GDNative in favor of a simpler, lower level interface. * New extension system allows registering core engine classes. * Simple header interface in gdnative_interace.h
580 lines
18 KiB
C++
580 lines
18 KiB
C++
/*************************************************************************/
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/* method_bind.h */
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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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#ifndef METHOD_BIND_H
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#define METHOD_BIND_H
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#include "core/variant/binder_common.h"
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enum MethodFlags {
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METHOD_FLAG_NORMAL = 1,
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METHOD_FLAG_EDITOR = 2,
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METHOD_FLAG_NOSCRIPT = 4,
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METHOD_FLAG_CONST = 8,
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METHOD_FLAG_REVERSE = 16, // used for events
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METHOD_FLAG_VIRTUAL = 32,
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METHOD_FLAG_FROM_SCRIPT = 64,
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METHOD_FLAG_VARARG = 128,
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METHOD_FLAG_STATIC = 256,
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METHOD_FLAGS_DEFAULT = METHOD_FLAG_NORMAL,
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};
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VARIANT_ENUM_CAST(MethodFlags)
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// some helpers
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class MethodBind {
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int method_id;
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uint32_t hint_flags = METHOD_FLAGS_DEFAULT;
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StringName name;
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StringName instance_class;
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Vector<Variant> default_arguments;
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int default_argument_count = 0;
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int argument_count = 0;
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bool _const = false;
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bool _returns = false;
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protected:
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#ifdef DEBUG_METHODS_ENABLED
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Variant::Type *argument_types = nullptr;
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Vector<StringName> arg_names;
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#endif
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void _set_const(bool p_const);
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void _set_returns(bool p_returns);
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#ifdef DEBUG_METHODS_ENABLED
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virtual Variant::Type _gen_argument_type(int p_arg) const = 0;
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virtual PropertyInfo _gen_argument_type_info(int p_arg) const = 0;
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void _generate_argument_types(int p_count);
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#endif
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void set_argument_count(int p_count) { argument_count = p_count; }
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public:
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_FORCE_INLINE_ const Vector<Variant> &get_default_arguments() const { return default_arguments; }
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_FORCE_INLINE_ int get_default_argument_count() const { return default_argument_count; }
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_FORCE_INLINE_ Variant has_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return false;
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} else {
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return true;
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}
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}
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_FORCE_INLINE_ Variant get_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return Variant();
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} else {
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return default_arguments[idx];
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}
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}
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#ifdef DEBUG_METHODS_ENABLED
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_FORCE_INLINE_ Variant::Type get_argument_type(int p_argument) const {
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ERR_FAIL_COND_V(p_argument < -1 || p_argument > argument_count, Variant::NIL);
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return argument_types[p_argument + 1];
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}
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PropertyInfo get_argument_info(int p_argument) const;
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PropertyInfo get_return_info() const;
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void set_argument_names(const Vector<StringName> &p_names); // Set by ClassDB, can't be inferred otherwise.
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Vector<StringName> get_argument_names() const;
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virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const = 0;
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#endif
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void set_hint_flags(uint32_t p_hint) { hint_flags = p_hint; }
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uint32_t get_hint_flags() const { return hint_flags | (is_const() ? METHOD_FLAG_CONST : 0) | (is_vararg() ? METHOD_FLAG_VARARG : 0); }
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_FORCE_INLINE_ StringName get_instance_class() const { return instance_class; }
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_FORCE_INLINE_ void set_instance_class(const StringName &p_class) { instance_class = p_class; }
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_FORCE_INLINE_ int get_argument_count() const { return argument_count; };
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virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) = 0;
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) = 0;
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StringName get_name() const;
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void set_name(const StringName &p_name);
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_FORCE_INLINE_ int get_method_id() const { return method_id; }
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_FORCE_INLINE_ bool is_const() const { return _const; }
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_FORCE_INLINE_ bool has_return() const { return _returns; }
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virtual bool is_vararg() const { return false; }
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void set_default_arguments(const Vector<Variant> &p_defargs);
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uint32_t get_hash() const;
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MethodBind();
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virtual ~MethodBind();
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};
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template <class T>
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class MethodBindVarArg : public MethodBind {
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public:
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typedef Variant (T::*NativeCall)(const Variant **, int, Callable::CallError &);
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protected:
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NativeCall call_method = nullptr;
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#ifdef DEBUG_METHODS_ENABLED
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MethodInfo arguments;
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#endif
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public:
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#ifdef DEBUG_METHODS_ENABLED
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virtual PropertyInfo _gen_argument_type_info(int p_arg) const {
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if (p_arg < 0) {
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return arguments.return_val;
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} else if (p_arg < arguments.arguments.size()) {
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return arguments.arguments[p_arg];
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} else {
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return PropertyInfo(Variant::NIL, "arg_" + itos(p_arg), PROPERTY_HINT_NONE, String(), PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
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}
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}
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virtual Variant::Type _gen_argument_type(int p_arg) const {
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return _gen_argument_type_info(p_arg).type;
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}
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virtual GodotTypeInfo::Metadata get_argument_meta(int) const {
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return GodotTypeInfo::METADATA_NONE;
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}
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#else
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virtual Variant::Type _gen_argument_type(int p_arg) const {
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return Variant::NIL;
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}
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#endif
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virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) {
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T *instance = static_cast<T *>(p_object);
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return (instance->*call_method)(p_args, p_arg_count, r_error);
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}
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void set_method_info(const MethodInfo &p_info, bool p_return_nil_is_variant) {
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set_argument_count(p_info.arguments.size());
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#ifdef DEBUG_METHODS_ENABLED
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Variant::Type *at = memnew_arr(Variant::Type, p_info.arguments.size() + 1);
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at[0] = p_info.return_val.type;
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if (p_info.arguments.size()) {
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Vector<StringName> names;
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names.resize(p_info.arguments.size());
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for (int i = 0; i < p_info.arguments.size(); i++) {
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at[i + 1] = p_info.arguments[i].type;
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names.write[i] = p_info.arguments[i].name;
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}
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set_argument_names(names);
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}
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argument_types = at;
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arguments = p_info;
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if (p_return_nil_is_variant) {
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arguments.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
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}
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#endif
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}
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) {
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ERR_FAIL(); // Can't call.
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}
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void set_method(NativeCall p_method) { call_method = p_method; }
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virtual bool is_const() const { return false; }
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virtual bool is_vararg() const { return true; }
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MethodBindVarArg() {
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_set_returns(true);
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}
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};
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template <class T>
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MethodBind *create_vararg_method_bind(Variant (T::*p_method)(const Variant **, int, Callable::CallError &), const MethodInfo &p_info, bool p_return_nil_is_variant) {
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MethodBindVarArg<T> *a = memnew((MethodBindVarArg<T>));
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a->set_method(p_method);
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a->set_method_info(p_info, p_return_nil_is_variant);
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a->set_instance_class(T::get_class_static());
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return a;
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}
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/**** VARIADIC TEMPLATES ****/
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#ifndef TYPED_METHOD_BIND
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class __UnexistingClass;
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#define MB_T __UnexistingClass
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#else
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#define MB_T T
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#endif
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// no return, not const
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif
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class MethodBindT : public MethodBind {
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void (MB_T::*method)(P...);
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protected:
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#ifdef DEBUG_METHODS_ENABLED
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual Variant::Type _gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return Variant::NIL;
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}
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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virtual PropertyInfo _gen_argument_type_info(int p_arg) const {
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PropertyInfo pi;
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call_get_argument_type_info<P...>(p_arg, pi);
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return pi;
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}
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#endif
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public:
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#ifdef DEBUG_METHODS_ENABLED
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virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const {
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return call_get_argument_metadata<P...>(p_arg);
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}
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#endif
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virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_dv(static_cast<T *>(p_object), method, p_args, p_arg_count, r_error, get_default_arguments());
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#else
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call_with_variant_args_dv((MB_T *)(p_object), method, p_args, p_arg_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, P...>(static_cast<T *>(p_object), method, p_args);
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#else
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call_with_ptr_args<MB_T, P...>((MB_T *)(p_object), method, p_args);
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#endif
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}
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MethodBindT(void (MB_T::*p_method)(P...)) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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_generate_argument_types(sizeof...(P));
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#endif
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...)) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindT<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindT<P...>)(reinterpret_cast<void (MB_T::*)(P...)>(p_method)));
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#endif
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// no return, not const
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif
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class MethodBindTC : public MethodBind {
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void (MB_T::*method)(P...) const;
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protected:
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#ifdef DEBUG_METHODS_ENABLED
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual Variant::Type _gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return Variant::NIL;
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}
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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virtual PropertyInfo _gen_argument_type_info(int p_arg) const {
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PropertyInfo pi;
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call_get_argument_type_info<P...>(p_arg, pi);
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return pi;
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}
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#endif
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public:
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#ifdef DEBUG_METHODS_ENABLED
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virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const {
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return call_get_argument_metadata<P...>(p_arg);
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}
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#endif
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virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_argsc_dv(static_cast<T *>(p_object), method, p_args, p_arg_count, r_error, get_default_arguments());
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#else
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call_with_variant_argsc_dv((MB_T *)(p_object), method, p_args, p_arg_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_argsc<T, P...>(static_cast<T *>(p_object), method, p_args);
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#else
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call_with_ptr_argsc<MB_T, P...>((MB_T *)(p_object), method, p_args);
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#endif
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}
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MethodBindTC(void (MB_T::*p_method)(P...) const) {
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method = p_method;
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_set_const(true);
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#ifdef DEBUG_METHODS_ENABLED
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_generate_argument_types(sizeof...(P));
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#endif
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...) const) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindTC<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindTC<P...>)(reinterpret_cast<void (MB_T::*)(P...) const>(p_method)));
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#endif
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// return, not const
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#ifdef TYPED_METHOD_BIND
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template <class T, class R, class... P>
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#else
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template <class R, class... P>
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#endif
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class MethodBindTR : public MethodBind {
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R(MB_T::*method)
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(P...);
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protected:
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#ifdef DEBUG_METHODS_ENABLED
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual Variant::Type _gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GetTypeInfo<R>::VARIANT_TYPE;
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}
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}
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virtual PropertyInfo _gen_argument_type_info(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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PropertyInfo pi;
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call_get_argument_type_info<P...>(p_arg, pi);
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return pi;
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} else {
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return GetTypeInfo<R>::get_class_info();
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}
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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#endif
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public:
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#ifdef DEBUG_METHODS_ENABLED
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virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const {
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if (p_arg >= 0) {
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return call_get_argument_metadata<P...>(p_arg);
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} else {
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return GetTypeInfo<R>::METADATA;
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}
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}
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#endif
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virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) {
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Variant ret;
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_ret_dv(static_cast<T *>(p_object), method, p_args, p_arg_count, ret, r_error, get_default_arguments());
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#else
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call_with_variant_args_ret_dv((MB_T *)p_object, method, p_args, p_arg_count, ret, r_error, get_default_arguments());
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#endif
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return ret;
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}
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args_ret<T, R, P...>(static_cast<T *>(p_object), method, p_args, r_ret);
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#else
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call_with_ptr_args_ret<MB_T, R, P...>((MB_T *)(p_object), method, p_args, r_ret);
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#endif
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}
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MethodBindTR(R (MB_T::*p_method)(P...)) {
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method = p_method;
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_set_returns(true);
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#ifdef DEBUG_METHODS_ENABLED
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_generate_argument_types(sizeof...(P));
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#endif
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set_argument_count(sizeof...(P));
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|
}
|
|
};
|
|
|
|
template <class T, class R, class... P>
|
|
MethodBind *create_method_bind(R (T::*p_method)(P...)) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
MethodBind *a = memnew((MethodBindTR<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTR<R, P...>)(reinterpret_cast<R (MB_T::*)(P...)>(p_method)));
|
|
#endif
|
|
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
// return, const
|
|
|
|
#ifdef TYPED_METHOD_BIND
|
|
template <class T, class R, class... P>
|
|
#else
|
|
template <class R, class... P>
|
|
#endif
|
|
class MethodBindTRC : public MethodBind {
|
|
R(MB_T::*method)
|
|
(P...) const;
|
|
|
|
protected:
|
|
#ifdef DEBUG_METHODS_ENABLED
|
|
// GCC raises warnings in the case P = {} as the comparison is always false...
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wlogical-op"
|
|
#endif
|
|
virtual Variant::Type _gen_argument_type(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
return call_get_argument_type<P...>(p_arg);
|
|
} else {
|
|
return GetTypeInfo<R>::VARIANT_TYPE;
|
|
}
|
|
}
|
|
|
|
virtual PropertyInfo _gen_argument_type_info(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
PropertyInfo pi;
|
|
call_get_argument_type_info<P...>(p_arg, pi);
|
|
return pi;
|
|
} else {
|
|
return GetTypeInfo<R>::get_class_info();
|
|
}
|
|
}
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
#endif
|
|
|
|
public:
|
|
#ifdef DEBUG_METHODS_ENABLED
|
|
virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const {
|
|
if (p_arg >= 0) {
|
|
return call_get_argument_metadata<P...>(p_arg);
|
|
} else {
|
|
return GetTypeInfo<R>::METADATA;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) {
|
|
Variant ret;
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_variant_args_retc_dv(static_cast<T *>(p_object), method, p_args, p_arg_count, ret, r_error, get_default_arguments());
|
|
#else
|
|
call_with_variant_args_retc_dv((MB_T *)(p_object), method, p_args, p_arg_count, ret, r_error, get_default_arguments());
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_ptr_args_retc<T, R, P...>(static_cast<T *>(p_object), method, p_args, r_ret);
|
|
#else
|
|
call_with_ptr_args_retc<MB_T, R, P...>((MB_T *)(p_object), method, p_args, r_ret);
|
|
#endif
|
|
}
|
|
|
|
MethodBindTRC(R (MB_T::*p_method)(P...) const) {
|
|
method = p_method;
|
|
_set_returns(true);
|
|
_set_const(true);
|
|
#ifdef DEBUG_METHODS_ENABLED
|
|
_generate_argument_types(sizeof...(P));
|
|
#endif
|
|
set_argument_count(sizeof...(P));
|
|
}
|
|
};
|
|
|
|
template <class T, class R, class... P>
|
|
MethodBind *create_method_bind(R (T::*p_method)(P...) const) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
MethodBind *a = memnew((MethodBindTRC<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTRC<R, P...>)(reinterpret_cast<R (MB_T::*)(P...) const>(p_method)));
|
|
#endif
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
#endif // METHOD_BIND_H
|