0be6d925dc
Which means that reduz' beloved style which we all became used to will now be changed automatically to remove the first empty line. This makes us lean closer to 1TBS (the one true brace style) instead of hybridating it with some Allman-inspired spacing. There's still the case of braces around single-statement blocks that needs to be addressed (but clang-format can't help with that, but clang-tidy may if we agree about it). Part of #33027.
390 lines
13 KiB
C++
390 lines
13 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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#ifdef DEBUG_ENABLED
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#define DEBUG_METHODS_ENABLED
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#endif
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#include "core/list.h"
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#include "core/method_ptrcall.h"
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#include "core/object.h"
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#include "core/type_info.h"
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#include "core/typedefs.h"
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#include "core/variant.h"
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#include <stdio.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_FLAGS_DEFAULT = METHOD_FLAG_NORMAL,
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};
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template <class T>
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struct VariantCaster {
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static _FORCE_INLINE_ T cast(const Variant &p_variant) {
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return p_variant;
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}
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};
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template <class T>
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struct VariantCaster<T &> {
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static _FORCE_INLINE_ T cast(const Variant &p_variant) {
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return p_variant;
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}
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};
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template <class T>
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struct VariantCaster<const T &> {
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static _FORCE_INLINE_ T cast(const Variant &p_variant) {
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return p_variant;
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}
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};
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#define _VC(m_idx) \
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(VariantCaster<P##m_idx>::cast((m_idx - 1) >= p_arg_count ? get_default_argument(m_idx - 1) : *p_args[m_idx - 1]))
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#ifdef PTRCALL_ENABLED
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#define VARIANT_ENUM_CAST(m_enum) \
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MAKE_ENUM_TYPE_INFO(m_enum) \
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template <> \
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struct VariantCaster<m_enum> { \
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static _FORCE_INLINE_ m_enum cast(const Variant &p_variant) { \
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return (m_enum)p_variant.operator int(); \
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} \
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}; \
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template <> \
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struct PtrToArg<m_enum> { \
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_FORCE_INLINE_ static m_enum convert(const void *p_ptr) { \
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return m_enum(*reinterpret_cast<const int *>(p_ptr)); \
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} \
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_FORCE_INLINE_ static void encode(m_enum p_val, const void *p_ptr) { \
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*(int *)p_ptr = p_val; \
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} \
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};
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#else
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#define VARIANT_ENUM_CAST(m_enum) \
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MAKE_ENUM_TYPE_INFO(m_enum) \
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template <> \
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struct VariantCaster<m_enum> { \
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static _FORCE_INLINE_ m_enum cast(const Variant &p_variant) { \
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return (m_enum)p_variant.operator int(); \
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} \
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};
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#endif
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// Object enum casts must go here
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VARIANT_ENUM_CAST(Object::ConnectFlags);
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template <typename T>
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struct VariantObjectClassChecker {
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static _FORCE_INLINE_ bool check(const Variant &p_variant) {
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return true;
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}
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};
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template <>
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struct VariantObjectClassChecker<Node *> {
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static _FORCE_INLINE_ bool check(const Variant &p_variant) {
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Object *obj = p_variant;
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Node *node = p_variant;
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return node || !obj;
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}
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};
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template <>
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struct VariantObjectClassChecker<Control *> {
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static _FORCE_INLINE_ bool check(const Variant &p_variant) {
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Object *obj = p_variant;
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Control *control = p_variant;
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return control || !obj;
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}
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};
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#define CHECK_ARG(m_arg) \
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if ((m_arg - 1) < p_arg_count) { \
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Variant::Type argtype = get_argument_type(m_arg - 1); \
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if (!Variant::can_convert_strict(p_args[m_arg - 1]->get_type(), argtype) || \
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!VariantObjectClassChecker<P##m_arg>::check(*p_args[m_arg - 1])) { \
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r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT; \
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r_error.argument = m_arg - 1; \
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r_error.expected = argtype; \
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return Variant(); \
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} \
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}
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#define CHECK_NOARG(m_arg) \
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{ \
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if (p_arg##m_arg.get_type() != Variant::NIL) { \
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if (r_argerror) \
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*r_argerror = (m_arg - 1); \
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return CALL_ERROR_EXTRA_ARGUMENT; \
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} \
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}
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// some helpers
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VARIANT_ENUM_CAST(Vector3::Axis);
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VARIANT_ENUM_CAST(Error);
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VARIANT_ENUM_CAST(Margin);
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VARIANT_ENUM_CAST(Corner);
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VARIANT_ENUM_CAST(Orientation);
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VARIANT_ENUM_CAST(HAlign);
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VARIANT_ENUM_CAST(VAlign);
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VARIANT_ENUM_CAST(PropertyHint);
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VARIANT_ENUM_CAST(PropertyUsageFlags);
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VARIANT_ENUM_CAST(MethodFlags);
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VARIANT_ENUM_CAST(Variant::Type);
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VARIANT_ENUM_CAST(Variant::Operator);
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template <>
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struct VariantCaster<wchar_t> {
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static _FORCE_INLINE_ wchar_t cast(const Variant &p_variant) {
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return (wchar_t)p_variant.operator int();
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}
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};
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#ifdef PTRCALL_ENABLED
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template <>
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struct PtrToArg<wchar_t> {
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_FORCE_INLINE_ static wchar_t convert(const void *p_ptr) {
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return wchar_t(*reinterpret_cast<const int *>(p_ptr));
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}
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_FORCE_INLINE_ static void encode(wchar_t p_val, const void *p_ptr) {
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*(int *)p_ptr = p_val;
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}
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};
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#endif
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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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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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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 = argument_count - p_arg - 1;
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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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_FORCE_INLINE_ Variant get_default_argument(int p_arg) const {
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int idx = argument_count - p_arg - 1;
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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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#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 class, db, 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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virtual String get_instance_class() const = 0;
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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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#ifdef PTRCALL_ENABLED
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virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) = 0;
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#endif
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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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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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#ifdef PTRCALL_ENABLED
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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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} //todo
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#endif
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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 String get_instance_class() const { return T::get_class_static(); }
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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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return a;
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}
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/** This amazing hack is based on the FastDelegates theory */
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// tale of an amazing hack.. //
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// if you declare a nonexistent class..
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class __UnexistingClass;
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#include "method_bind.gen.inc"
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#endif // METHOD_BIND_H
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