c7459e3855
Since there might be tricky cases in the analyzer (in the case of unsafe lines) which would need to be properly checked again. Instead, this splits the code generator in two functions and use information set by the analyzer to tell which function to use, without a need to re-check.
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, MultiplayerAPI::RPCMode p_rpc_mode, 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_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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