502 lines
20 KiB
C++
502 lines
20 KiB
C++
/*************************************************************************/
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/* gdscript_byte_codegen.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 GDSCRIPT_BYTE_CODEGEN
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#define GDSCRIPT_BYTE_CODEGEN
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#include "gdscript_codegen.h"
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#include "gdscript_function.h"
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#include "gdscript_utility_functions.h"
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class GDScriptByteCodeGenerator : public GDScriptCodeGenerator {
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struct StackSlot {
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Variant::Type type = Variant::NIL;
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Vector<int> bytecode_indices;
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StackSlot() = default;
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StackSlot(Variant::Type p_type) :
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type(p_type) {}
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};
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const static int RESERVED_STACK = 3; // For self, class, and nil.
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bool ended = false;
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GDScriptFunction *function = nullptr;
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bool debug_stack = false;
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Vector<int> opcodes;
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List<Map<StringName, int>> stack_id_stack;
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Map<StringName, int> stack_identifiers;
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List<int> stack_identifiers_counts;
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Map<StringName, int> local_constants;
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Vector<StackSlot> locals;
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Vector<StackSlot> temporaries;
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List<int> used_temporaries;
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Map<Variant::Type, List<int>> temporaries_pool;
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List<GDScriptFunction::StackDebug> stack_debug;
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List<Map<StringName, int>> block_identifier_stack;
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Map<StringName, int> block_identifiers;
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int max_locals = 0;
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int current_line = 0;
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int instr_args_max = 0;
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int ptrcall_max = 0;
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#ifdef DEBUG_ENABLED
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List<int> temp_stack;
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#endif
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HashMap<Variant, int, VariantHasher, VariantComparator> constant_map;
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Map<StringName, int> name_map;
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#ifdef TOOLS_ENABLED
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Vector<StringName> named_globals;
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#endif
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Map<Variant::ValidatedOperatorEvaluator, int> operator_func_map;
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Map<Variant::ValidatedSetter, int> setters_map;
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Map<Variant::ValidatedGetter, int> getters_map;
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Map<Variant::ValidatedKeyedSetter, int> keyed_setters_map;
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Map<Variant::ValidatedKeyedGetter, int> keyed_getters_map;
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Map<Variant::ValidatedIndexedSetter, int> indexed_setters_map;
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Map<Variant::ValidatedIndexedGetter, int> indexed_getters_map;
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Map<Variant::ValidatedBuiltInMethod, int> builtin_method_map;
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Map<Variant::ValidatedConstructor, int> constructors_map;
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Map<Variant::ValidatedUtilityFunction, int> utilities_map;
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Map<GDScriptUtilityFunctions::FunctionPtr, int> gds_utilities_map;
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Map<MethodBind *, int> method_bind_map;
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Map<GDScriptFunction *, int> lambdas_map;
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// Lists since these can be nested.
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List<int> if_jmp_addrs;
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List<int> for_jmp_addrs;
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List<Address> for_iterator_variables;
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List<Address> for_counter_variables;
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List<Address> for_container_variables;
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List<int> while_jmp_addrs;
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List<int> continue_addrs;
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// Used to patch jumps with `and` and `or` operators with short-circuit.
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List<int> logic_op_jump_pos1;
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List<int> logic_op_jump_pos2;
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List<Address> ternary_result;
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List<int> ternary_jump_fail_pos;
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List<int> ternary_jump_skip_pos;
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List<List<int>> current_breaks_to_patch;
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List<List<int>> match_continues_to_patch;
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void add_stack_identifier(const StringName &p_id, int p_stackpos) {
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if (locals.size() > max_locals) {
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max_locals = locals.size();
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}
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stack_identifiers[p_id] = p_stackpos;
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if (debug_stack) {
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block_identifiers[p_id] = p_stackpos;
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GDScriptFunction::StackDebug sd;
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sd.added = true;
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sd.line = current_line;
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sd.identifier = p_id;
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sd.pos = p_stackpos;
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stack_debug.push_back(sd);
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}
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}
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void push_stack_identifiers() {
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stack_identifiers_counts.push_back(locals.size());
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stack_id_stack.push_back(stack_identifiers);
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if (debug_stack) {
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Map<StringName, int> block_ids(block_identifiers);
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block_identifier_stack.push_back(block_ids);
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block_identifiers.clear();
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}
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}
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void pop_stack_identifiers() {
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int current_locals = stack_identifiers_counts.back()->get();
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stack_identifiers_counts.pop_back();
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stack_identifiers = stack_id_stack.back()->get();
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stack_id_stack.pop_back();
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#ifdef DEBUG_ENABLED
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if (!used_temporaries.is_empty()) {
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ERR_PRINT("Leaving block with non-zero temporary variables: " + itos(used_temporaries.size()));
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}
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#endif
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locals.resize(current_locals);
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if (debug_stack) {
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for (Map<StringName, int>::Element *E = block_identifiers.front(); E; E = E->next()) {
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GDScriptFunction::StackDebug sd;
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sd.added = false;
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sd.identifier = E->key();
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sd.line = current_line;
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sd.pos = E->get();
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stack_debug.push_back(sd);
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}
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block_identifiers = block_identifier_stack.back()->get();
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block_identifier_stack.pop_back();
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}
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}
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int get_name_map_pos(const StringName &p_identifier) {
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int ret;
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if (!name_map.has(p_identifier)) {
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ret = name_map.size();
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name_map[p_identifier] = ret;
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} else {
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ret = name_map[p_identifier];
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}
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return ret;
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}
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int get_constant_pos(const Variant &p_constant) {
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if (constant_map.has(p_constant)) {
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return constant_map[p_constant];
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}
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int pos = constant_map.size();
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constant_map[p_constant] = pos;
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return pos;
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}
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int get_operation_pos(const Variant::ValidatedOperatorEvaluator p_operation) {
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if (operator_func_map.has(p_operation)) {
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return operator_func_map[p_operation];
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}
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int pos = operator_func_map.size();
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operator_func_map[p_operation] = pos;
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return pos;
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}
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int get_setter_pos(const Variant::ValidatedSetter p_setter) {
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if (setters_map.has(p_setter)) {
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return setters_map[p_setter];
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}
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int pos = setters_map.size();
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setters_map[p_setter] = pos;
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return pos;
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}
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int get_getter_pos(const Variant::ValidatedGetter p_getter) {
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if (getters_map.has(p_getter)) {
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return getters_map[p_getter];
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}
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int pos = getters_map.size();
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getters_map[p_getter] = pos;
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return pos;
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}
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int get_keyed_setter_pos(const Variant::ValidatedKeyedSetter p_keyed_setter) {
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if (keyed_setters_map.has(p_keyed_setter)) {
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return keyed_setters_map[p_keyed_setter];
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}
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int pos = keyed_setters_map.size();
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keyed_setters_map[p_keyed_setter] = pos;
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return pos;
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}
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int get_keyed_getter_pos(const Variant::ValidatedKeyedGetter p_keyed_getter) {
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if (keyed_getters_map.has(p_keyed_getter)) {
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return keyed_getters_map[p_keyed_getter];
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}
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int pos = keyed_getters_map.size();
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keyed_getters_map[p_keyed_getter] = pos;
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return pos;
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}
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int get_indexed_setter_pos(const Variant::ValidatedIndexedSetter p_indexed_setter) {
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if (indexed_setters_map.has(p_indexed_setter)) {
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return indexed_setters_map[p_indexed_setter];
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}
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int pos = indexed_setters_map.size();
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indexed_setters_map[p_indexed_setter] = pos;
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return pos;
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}
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int get_indexed_getter_pos(const Variant::ValidatedIndexedGetter p_indexed_getter) {
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if (indexed_getters_map.has(p_indexed_getter)) {
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return indexed_getters_map[p_indexed_getter];
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}
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int pos = indexed_getters_map.size();
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indexed_getters_map[p_indexed_getter] = pos;
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return pos;
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}
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int get_builtin_method_pos(const Variant::ValidatedBuiltInMethod p_method) {
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if (builtin_method_map.has(p_method)) {
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return builtin_method_map[p_method];
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}
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int pos = builtin_method_map.size();
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builtin_method_map[p_method] = pos;
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return pos;
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}
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int get_constructor_pos(const Variant::ValidatedConstructor p_constructor) {
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if (constructors_map.has(p_constructor)) {
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return constructors_map[p_constructor];
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}
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int pos = constructors_map.size();
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constructors_map[p_constructor] = pos;
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return pos;
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}
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int get_utility_pos(const Variant::ValidatedUtilityFunction p_utility) {
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if (utilities_map.has(p_utility)) {
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return utilities_map[p_utility];
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}
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int pos = utilities_map.size();
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utilities_map[p_utility] = pos;
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return pos;
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}
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int get_gds_utility_pos(const GDScriptUtilityFunctions::FunctionPtr p_gds_utility) {
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if (gds_utilities_map.has(p_gds_utility)) {
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return gds_utilities_map[p_gds_utility];
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}
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int pos = gds_utilities_map.size();
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gds_utilities_map[p_gds_utility] = pos;
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return pos;
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}
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int get_method_bind_pos(MethodBind *p_method) {
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if (method_bind_map.has(p_method)) {
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return method_bind_map[p_method];
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}
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int pos = method_bind_map.size();
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method_bind_map[p_method] = pos;
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return pos;
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}
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int get_lambda_function_pos(GDScriptFunction *p_lambda_function) {
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if (lambdas_map.has(p_lambda_function)) {
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return lambdas_map[p_lambda_function];
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}
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int pos = lambdas_map.size();
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lambdas_map[p_lambda_function] = pos;
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return pos;
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}
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void alloc_ptrcall(int p_params) {
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if (p_params >= ptrcall_max) {
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ptrcall_max = p_params;
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}
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}
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int address_of(const Address &p_address) {
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switch (p_address.mode) {
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case Address::SELF:
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return GDScriptFunction::ADDR_SELF;
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case Address::CLASS:
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return GDScriptFunction::ADDR_CLASS;
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case Address::MEMBER:
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return p_address.address | (GDScriptFunction::ADDR_TYPE_MEMBER << GDScriptFunction::ADDR_BITS);
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case Address::CONSTANT:
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return p_address.address | (GDScriptFunction::ADDR_TYPE_CONSTANT << GDScriptFunction::ADDR_BITS);
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case Address::LOCAL_VARIABLE:
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case Address::FUNCTION_PARAMETER:
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return p_address.address | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
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case Address::TEMPORARY:
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temporaries.write[p_address.address].bytecode_indices.push_back(opcodes.size());
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return -1;
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case Address::NIL:
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return GDScriptFunction::ADDR_NIL;
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}
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return -1; // Unreachable.
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}
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void append(GDScriptFunction::Opcode p_code, int p_argument_count) {
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opcodes.push_back((p_code & GDScriptFunction::INSTR_MASK) | (p_argument_count << GDScriptFunction::INSTR_BITS));
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instr_args_max = MAX(instr_args_max, p_argument_count);
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}
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void append(int p_code) {
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opcodes.push_back(p_code);
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}
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void append(const Address &p_address) {
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opcodes.push_back(address_of(p_address));
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}
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void append(const StringName &p_name) {
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opcodes.push_back(get_name_map_pos(p_name));
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}
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void append(const Variant::ValidatedOperatorEvaluator p_operation) {
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opcodes.push_back(get_operation_pos(p_operation));
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}
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void append(const Variant::ValidatedSetter p_setter) {
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opcodes.push_back(get_setter_pos(p_setter));
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}
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void append(const Variant::ValidatedGetter p_getter) {
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opcodes.push_back(get_getter_pos(p_getter));
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}
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void append(const Variant::ValidatedKeyedSetter p_keyed_setter) {
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opcodes.push_back(get_keyed_setter_pos(p_keyed_setter));
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}
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void append(const Variant::ValidatedKeyedGetter p_keyed_getter) {
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opcodes.push_back(get_keyed_getter_pos(p_keyed_getter));
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}
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void append(const Variant::ValidatedIndexedSetter p_indexed_setter) {
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opcodes.push_back(get_indexed_setter_pos(p_indexed_setter));
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}
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void append(const Variant::ValidatedIndexedGetter p_indexed_getter) {
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opcodes.push_back(get_indexed_getter_pos(p_indexed_getter));
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}
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void append(const Variant::ValidatedBuiltInMethod p_method) {
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opcodes.push_back(get_builtin_method_pos(p_method));
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}
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void append(const Variant::ValidatedConstructor p_constructor) {
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opcodes.push_back(get_constructor_pos(p_constructor));
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}
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void append(const Variant::ValidatedUtilityFunction p_utility) {
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opcodes.push_back(get_utility_pos(p_utility));
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}
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void append(const GDScriptUtilityFunctions::FunctionPtr p_gds_utility) {
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opcodes.push_back(get_gds_utility_pos(p_gds_utility));
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}
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void append(MethodBind *p_method) {
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opcodes.push_back(get_method_bind_pos(p_method));
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}
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void append(GDScriptFunction *p_lambda_function) {
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opcodes.push_back(get_lambda_function_pos(p_lambda_function));
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}
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void patch_jump(int p_address) {
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opcodes.write[p_address] = opcodes.size();
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}
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public:
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virtual uint32_t add_parameter(const StringName &p_name, bool p_is_optional, const GDScriptDataType &p_type) override;
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virtual uint32_t add_local(const StringName &p_name, const GDScriptDataType &p_type) override;
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virtual uint32_t add_local_constant(const StringName &p_name, const Variant &p_constant) override;
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virtual uint32_t add_or_get_constant(const Variant &p_constant) override;
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virtual uint32_t add_or_get_name(const StringName &p_name) override;
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virtual uint32_t add_temporary(const GDScriptDataType &p_type) override;
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virtual void pop_temporary() override;
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virtual void start_parameters() override;
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virtual void end_parameters() override;
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virtual void start_block() override;
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virtual void end_block() override;
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virtual void write_start(GDScript *p_script, const StringName &p_function_name, bool p_static, Multiplayer::RPCConfig p_rpc_config, const GDScriptDataType &p_return_type) override;
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virtual GDScriptFunction *write_end() override;
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#ifdef DEBUG_ENABLED
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virtual void set_signature(const String &p_signature) override;
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#endif
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virtual void set_initial_line(int p_line) override;
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virtual void write_type_adjust(const Address &p_target, Variant::Type p_new_type) override;
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virtual void write_unary_operator(const Address &p_target, Variant::Operator p_operator, const Address &p_left_operand) override;
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virtual void write_binary_operator(const Address &p_target, Variant::Operator p_operator, const Address &p_left_operand, const Address &p_right_operand) override;
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virtual void write_type_test(const Address &p_target, const Address &p_source, const Address &p_type) override;
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virtual void write_type_test_builtin(const Address &p_target, const Address &p_source, Variant::Type p_type) override;
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virtual void write_and_left_operand(const Address &p_left_operand) override;
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virtual void write_and_right_operand(const Address &p_right_operand) override;
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virtual void write_end_and(const Address &p_target) override;
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virtual void write_or_left_operand(const Address &p_left_operand) override;
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virtual void write_or_right_operand(const Address &p_right_operand) override;
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virtual void write_end_or(const Address &p_target) override;
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virtual void write_start_ternary(const Address &p_target) override;
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virtual void write_ternary_condition(const Address &p_condition) override;
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virtual void write_ternary_true_expr(const Address &p_expr) override;
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virtual void write_ternary_false_expr(const Address &p_expr) override;
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virtual void write_end_ternary() override;
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virtual void write_set(const Address &p_target, const Address &p_index, const Address &p_source) override;
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virtual void write_get(const Address &p_target, const Address &p_index, const Address &p_source) override;
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virtual void write_set_named(const Address &p_target, const StringName &p_name, const Address &p_source) override;
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virtual void write_get_named(const Address &p_target, const StringName &p_name, const Address &p_source) override;
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virtual void write_set_member(const Address &p_value, const StringName &p_name) override;
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virtual void write_get_member(const Address &p_target, const StringName &p_name) override;
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virtual void write_assign(const Address &p_target, const Address &p_source) override;
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virtual void write_assign_with_conversion(const Address &p_target, const Address &p_source) override;
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virtual void write_assign_true(const Address &p_target) override;
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virtual void write_assign_false(const Address &p_target) override;
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virtual void write_assign_default_parameter(const Address &p_dst, const Address &p_src) override;
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virtual void write_store_global(const Address &p_dst, int p_global_index) override;
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virtual void write_store_named_global(const Address &p_dst, const StringName &p_global) override;
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virtual void write_cast(const Address &p_target, const Address &p_source, const GDScriptDataType &p_type) override;
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virtual void write_call(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_super_call(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_call_async(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_call_utility(const Address &p_target, const StringName &p_function, const Vector<Address> &p_arguments) override;
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virtual void write_call_gdscript_utility(const Address &p_target, GDScriptUtilityFunctions::FunctionPtr p_function, const Vector<Address> &p_arguments) override;
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virtual void write_call_builtin_type(const Address &p_target, const Address &p_base, Variant::Type p_type, const StringName &p_method, const Vector<Address> &p_arguments) override;
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virtual void write_call_builtin_type_static(const Address &p_target, Variant::Type p_type, const StringName &p_method, const Vector<Address> &p_arguments) override;
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virtual void write_call_method_bind(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) override;
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virtual void write_call_ptrcall(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) override;
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virtual void write_call_self(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_call_self_async(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_call_script_function(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
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virtual void write_lambda(const Address &p_target, GDScriptFunction *p_function, const Vector<Address> &p_captures) override;
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virtual void write_construct(const Address &p_target, Variant::Type p_type, const Vector<Address> &p_arguments) override;
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virtual void write_construct_array(const Address &p_target, const Vector<Address> &p_arguments) override;
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virtual void write_construct_typed_array(const Address &p_target, const GDScriptDataType &p_element_type, const Vector<Address> &p_arguments) override;
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virtual void write_construct_dictionary(const Address &p_target, const Vector<Address> &p_arguments) override;
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virtual void write_await(const Address &p_target, const Address &p_operand) override;
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virtual void write_if(const Address &p_condition) override;
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virtual void write_else() override;
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virtual void write_endif() override;
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virtual void start_for(const GDScriptDataType &p_iterator_type, const GDScriptDataType &p_list_type) override;
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virtual void write_for_assignment(const Address &p_variable, const Address &p_list) override;
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virtual void write_for() override;
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virtual void write_endfor() override;
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virtual void start_while_condition() override;
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virtual void write_while(const Address &p_condition) override;
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virtual void write_endwhile() override;
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virtual void start_match() override;
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virtual void start_match_branch() override;
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virtual void end_match() override;
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virtual void write_break() override;
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virtual void write_continue() override;
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virtual void write_continue_match() override;
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virtual void write_breakpoint() override;
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virtual void write_newline(int p_line) override;
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virtual void write_return(const Address &p_return_value) override;
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virtual void write_assert(const Address &p_test, const Address &p_message) override;
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virtual ~GDScriptByteCodeGenerator();
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};
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#endif // GDSCRIPT_BYTE_CODEGEN
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