godot/modules/gdscript/gdscript_compiler.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

2182 lines
75 KiB
C++

/*************************************************************************/
/* gdscript_compiler.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gdscript_compiler.h"
#include "gdscript.h"
bool GDScriptCompiler::_is_class_member_property(CodeGen &codegen, const StringName &p_name) {
if (codegen.function_node && codegen.function_node->_static)
return false;
if (codegen.stack_identifiers.has(p_name))
return false; //shadowed
return _is_class_member_property(codegen.script, p_name);
}
bool GDScriptCompiler::_is_class_member_property(GDScript *owner, const StringName &p_name) {
GDScript *scr = owner;
GDScriptNativeClass *nc = NULL;
while (scr) {
if (scr->native.is_valid())
nc = scr->native.ptr();
scr = scr->_base;
}
ERR_FAIL_COND_V(!nc, false);
return ClassDB::has_property(nc->get_name(), p_name);
}
void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::Node *p_node) {
if (error != "")
return;
error = p_error;
if (p_node) {
err_line = p_node->line;
err_column = p_node->column;
} else {
err_line = 0;
err_column = 0;
}
}
bool GDScriptCompiler::_create_unary_operator(CodeGen &codegen, const GDScriptParser::OperatorNode *on, Variant::Operator op, int p_stack_level) {
ERR_FAIL_COND_V(on->arguments.size() != 1, false);
int src_address_a = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (src_address_a < 0)
return false;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_a); // argument 2 (repeated)
//codegen.opcodes.push_back(GDScriptFunction::ADDR_TYPE_NIL); // argument 2 (unary only takes one parameter)
return true;
}
bool GDScriptCompiler::_create_binary_operator(CodeGen &codegen, const GDScriptParser::OperatorNode *on, Variant::Operator op, int p_stack_level, bool p_initializer) {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
int src_address_a = _parse_expression(codegen, on->arguments[0], p_stack_level, false, p_initializer);
if (src_address_a < 0)
return false;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
p_stack_level++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen, on->arguments[1], p_stack_level, false, p_initializer);
if (src_address_b < 0)
return false;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
return true;
}
GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype) const {
if (!p_datatype.has_type) {
return GDScriptDataType();
}
GDScriptDataType result;
result.has_type = true;
switch (p_datatype.kind) {
case GDScriptParser::DataType::BUILTIN: {
result.kind = GDScriptDataType::BUILTIN;
result.builtin_type = p_datatype.builtin_type;
} break;
case GDScriptParser::DataType::NATIVE: {
result.kind = GDScriptDataType::NATIVE;
result.native_type = p_datatype.native_type;
} break;
case GDScriptParser::DataType::SCRIPT: {
result.kind = GDScriptDataType::SCRIPT;
result.script_type = p_datatype.script_type;
result.native_type = result.script_type->get_instance_base_type();
} break;
case GDScriptParser::DataType::GDSCRIPT: {
result.kind = GDScriptDataType::GDSCRIPT;
result.script_type = p_datatype.script_type;
result.native_type = result.script_type->get_instance_base_type();
} break;
case GDScriptParser::DataType::CLASS: {
// Locate class by constructing the path to it and following that path
GDScriptParser::ClassNode *class_type = p_datatype.class_type;
List<StringName> names;
while (class_type->owner) {
names.push_back(class_type->name);
class_type = class_type->owner;
}
Ref<GDScript> script = Ref<GDScript>(main_script);
while (names.back()) {
if (!script->subclasses.has(names.back()->get())) {
ERR_PRINT("Parser bug: Cannot locate datatype class.");
result.has_type = false;
return GDScriptDataType();
}
script = script->subclasses[names.back()->get()];
names.pop_back();
}
result.kind = GDScriptDataType::GDSCRIPT;
result.script_type = script;
result.native_type = script->get_instance_base_type();
} break;
default: {
ERR_PRINT("Parser bug: converting unresolved type.");
return GDScriptDataType();
}
}
return result;
}
int GDScriptCompiler::_parse_assign_right_expression(CodeGen &codegen, const GDScriptParser::OperatorNode *p_expression, int p_stack_level) {
Variant::Operator var_op = Variant::OP_MAX;
switch (p_expression->op) {
case GDScriptParser::OperatorNode::OP_ASSIGN_ADD: var_op = Variant::OP_ADD; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SUB: var_op = Variant::OP_SUBTRACT; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_MUL: var_op = Variant::OP_MULTIPLY; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_DIV: var_op = Variant::OP_DIVIDE; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_MOD: var_op = Variant::OP_MODULE; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT: var_op = Variant::OP_SHIFT_LEFT; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT: var_op = Variant::OP_SHIFT_RIGHT; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_AND: var_op = Variant::OP_BIT_AND; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_OR: var_op = Variant::OP_BIT_OR; break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_XOR: var_op = Variant::OP_BIT_XOR; break;
case GDScriptParser::OperatorNode::OP_INIT_ASSIGN:
case GDScriptParser::OperatorNode::OP_ASSIGN: {
//none
} break;
default: {
ERR_FAIL_V(-1);
}
}
bool initializer = p_expression->op == GDScriptParser::OperatorNode::OP_INIT_ASSIGN;
if (var_op == Variant::OP_MAX) {
return _parse_expression(codegen, p_expression->arguments[1], p_stack_level, false, initializer);
}
if (!_create_binary_operator(codegen, p_expression, var_op, p_stack_level, initializer))
return -1;
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
}
int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::Node *p_expression, int p_stack_level, bool p_root, bool p_initializer) {
switch (p_expression->type) {
//should parse variable declaration and adjust stack accordingly...
case GDScriptParser::Node::TYPE_IDENTIFIER: {
//return identifier
//wait, identifier could be a local variable or something else... careful here, must reference properly
//as stack may be more interesting to work with
//This could be made much simpler by just indexing "self", but done this way (with custom self-addressing modes) increases performance a lot.
const GDScriptParser::IdentifierNode *in = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
StringName identifier = in->name;
// TRY STACK!
if (!p_initializer && codegen.stack_identifiers.has(identifier)) {
int pos = codegen.stack_identifiers[identifier];
return pos | (GDScriptFunction::ADDR_TYPE_STACK_VARIABLE << GDScriptFunction::ADDR_BITS);
}
// TRY CLASS MEMBER
if (_is_class_member_property(codegen, identifier)) {
//get property
codegen.opcodes.push_back(GDScriptFunction::OPCODE_GET_MEMBER); // perform operator
codegen.opcodes.push_back(codegen.get_name_map_pos(identifier)); // argument 2 (unary only takes one parameter)
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
}
//TRY MEMBERS!
if (!codegen.function_node || !codegen.function_node->_static) {
// TRY MEMBER VARIABLES!
//static function
if (codegen.script->member_indices.has(identifier)) {
int idx = codegen.script->member_indices[identifier].index;
return idx | (GDScriptFunction::ADDR_TYPE_MEMBER << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
}
//TRY CLASS CONSTANTS
GDScript *owner = codegen.script;
while (owner) {
GDScript *scr = owner;
GDScriptNativeClass *nc = NULL;
while (scr) {
if (scr->constants.has(identifier)) {
//int idx=scr->constants[identifier];
int idx = codegen.get_name_map_pos(identifier);
return idx | (GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
if (scr->native.is_valid())
nc = scr->native.ptr();
scr = scr->_base;
}
// CLASS C++ Integer Constant
if (nc) {
bool success = false;
int constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success);
if (success) {
Variant key = constant;
int idx;
if (!codegen.constant_map.has(key)) {
idx = codegen.constant_map.size();
codegen.constant_map[key] = idx;
} else {
idx = codegen.constant_map[key];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //make it a local constant (faster access)
}
}
owner = owner->_owner;
}
if (GDScriptLanguage::get_singleton()->get_global_map().has(identifier)) {
int idx = GDScriptLanguage::get_singleton()->get_global_map()[identifier];
return idx | (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
/* TRY GLOBAL CLASSES */
if (ScriptServer::is_global_class(identifier)) {
const GDScriptParser::ClassNode *class_node = codegen.class_node;
while (class_node->owner) {
class_node = class_node->owner;
}
if (class_node->name == identifier) {
_set_error("Using own name in class file is not allowed (creates a cyclic reference)", p_expression);
return -1;
}
RES res = ResourceLoader::load(ScriptServer::get_global_class_path(identifier));
if (res.is_null()) {
_set_error("Can't load global class " + String(identifier) + ", cyclic reference?", p_expression);
return -1;
}
Variant key = res;
int idx;
if (!codegen.constant_map.has(key)) {
idx = codegen.constant_map.size();
codegen.constant_map[key] = idx;
} else {
idx = codegen.constant_map[key];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //make it a local constant (faster access)
}
#ifdef TOOLS_ENABLED
if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
int idx = codegen.named_globals.find(identifier);
if (idx == -1) {
idx = codegen.named_globals.size();
codegen.named_globals.push_back(identifier);
}
return idx | (GDScriptFunction::ADDR_TYPE_NAMED_GLOBAL << GDScriptFunction::ADDR_BITS);
}
#endif
//not found, error
_set_error("Identifier not found: " + String(identifier), p_expression);
return -1;
} break;
case GDScriptParser::Node::TYPE_CONSTANT: {
//return constant
const GDScriptParser::ConstantNode *cn = static_cast<const GDScriptParser::ConstantNode *>(p_expression);
int idx;
if (!codegen.constant_map.has(cn->value)) {
idx = codegen.constant_map.size();
codegen.constant_map[cn->value] = idx;
} else {
idx = codegen.constant_map[cn->value];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //argument (stack root)
} break;
case GDScriptParser::Node::TYPE_SELF: {
//return constant
if (codegen.function_node && codegen.function_node->_static) {
_set_error("'self' not present in static function!", p_expression);
return -1;
}
return (GDScriptFunction::ADDR_TYPE_SELF << GDScriptFunction::ADDR_BITS);
} break;
case GDScriptParser::Node::TYPE_ARRAY: {
const GDScriptParser::ArrayNode *an = static_cast<const GDScriptParser::ArrayNode *>(p_expression);
Vector<int> values;
int slevel = p_stack_level;
for (int i = 0; i < an->elements.size(); i++) {
int ret = _parse_expression(codegen, an->elements[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT_ARRAY);
codegen.opcodes.push_back(values.size());
for (int i = 0; i < values.size(); i++)
codegen.opcodes.push_back(values[i]);
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_DICTIONARY: {
const GDScriptParser::DictionaryNode *dn = static_cast<const GDScriptParser::DictionaryNode *>(p_expression);
Vector<int> values;
int slevel = p_stack_level;
for (int i = 0; i < dn->elements.size(); i++) {
int ret = _parse_expression(codegen, dn->elements[i].key, slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
ret = _parse_expression(codegen, dn->elements[i].value, slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT_DICTIONARY);
codegen.opcodes.push_back(dn->elements.size());
for (int i = 0; i < values.size(); i++)
codegen.opcodes.push_back(values[i]);
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_CAST: {
const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
int slevel = p_stack_level;
int src_addr = _parse_expression(codegen, cn->source_node, slevel);
if (src_addr < 0)
return src_addr;
if (src_addr & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
GDScriptDataType cast_type = _gdtype_from_datatype(cn->cast_type);
switch (cast_type.kind) {
case GDScriptDataType::BUILTIN: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_BUILTIN);
codegen.opcodes.push_back(cast_type.builtin_type);
} break;
case GDScriptDataType::NATIVE: {
int class_idx;
if (GDScriptLanguage::get_singleton()->get_global_map().has(cast_type.native_type)) {
class_idx = GDScriptLanguage::get_singleton()->get_global_map()[cast_type.native_type];
class_idx |= (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
} else {
_set_error("Invalid native class type '" + String(cast_type.native_type) + "'.", cn);
return -1;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_NATIVE); // perform operator
codegen.opcodes.push_back(class_idx); // variable type
} break;
case GDScriptDataType::SCRIPT:
case GDScriptDataType::GDSCRIPT: {
Variant script = cast_type.script_type;
int idx = codegen.get_constant_pos(script);
idx |= GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS; //make it a local constant (faster access)
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_SCRIPT); // perform operator
codegen.opcodes.push_back(idx); // variable type
} break;
default: {
_set_error("Parser bug: unresolved data type.", cn);
return -1;
}
}
codegen.opcodes.push_back(src_addr); // source address
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_OPERATOR: {
//hell breaks loose
const GDScriptParser::OperatorNode *on = static_cast<const GDScriptParser::OperatorNode *>(p_expression);
switch (on->op) {
//call/constructor operator
case GDScriptParser::OperatorNode::OP_PARENT_CALL: {
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
const GDScriptParser::IdentifierNode *in = (const GDScriptParser::IdentifierNode *)on->arguments[0];
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_SELF_BASE); // basic type constructor
codegen.opcodes.push_back(codegen.get_name_map_pos(in->name)); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} break;
case GDScriptParser::OperatorNode::OP_CALL: {
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_TYPE) {
//construct a basic type
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
const GDScriptParser::TypeNode *tn = (const GDScriptParser::TypeNode *)on->arguments[0];
int vtype = tn->vtype;
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT); // basic type constructor
codegen.opcodes.push_back(vtype); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} else if (on->arguments[0]->type == GDScriptParser::Node::TYPE_BUILT_IN_FUNCTION) {
//built in function
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_BUILT_IN);
codegen.opcodes.push_back(static_cast<const GDScriptParser::BuiltInFunctionNode *>(on->arguments[0])->function);
codegen.opcodes.push_back(on->arguments.size() - 1);
codegen.alloc_call(on->arguments.size() - 1);
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]);
} else {
//regular function
ERR_FAIL_COND_V(on->arguments.size() < 2, -1);
const GDScriptParser::Node *instance = on->arguments[0];
if (instance->type == GDScriptParser::Node::TYPE_SELF) {
//room for optimization
}
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 0; i < on->arguments.size(); i++) {
int ret;
if (i == 0 && on->arguments[i]->type == GDScriptParser::Node::TYPE_SELF && codegen.function_node && codegen.function_node->_static) {
//static call to self
ret = (GDScriptFunction::ADDR_TYPE_CLASS << GDScriptFunction::ADDR_BITS);
} else if (i == 1) {
if (on->arguments[i]->type != GDScriptParser::Node::TYPE_IDENTIFIER) {
_set_error("Attempt to call a non-identifier.", on);
return -1;
}
GDScriptParser::IdentifierNode *id = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[i]);
ret = codegen.get_name_map_pos(id->name);
} else {
ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(p_root ? GDScriptFunction::OPCODE_CALL : GDScriptFunction::OPCODE_CALL_RETURN); // perform operator
codegen.opcodes.push_back(on->arguments.size() - 2);
codegen.alloc_call(on->arguments.size() - 2);
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]);
}
} break;
case GDScriptParser::OperatorNode::OP_YIELD: {
ERR_FAIL_COND_V(on->arguments.size() && on->arguments.size() != 2, -1);
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 0; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(arguments.size() == 0 ? GDScriptFunction::OPCODE_YIELD : GDScriptFunction::OPCODE_YIELD_SIGNAL); // basic type constructor
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
codegen.opcodes.push_back(GDScriptFunction::OPCODE_YIELD_RESUME);
//next will be where to place the result :)
} break;
//indexing operator
case GDScriptParser::OperatorNode::OP_INDEX:
case GDScriptParser::OperatorNode::OP_INDEX_NAMED: {
ERR_FAIL_COND_V(on->arguments.size() != 2, -1);
int slevel = p_stack_level;
bool named = (on->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED);
int from = _parse_expression(codegen, on->arguments[0], slevel);
if (from < 0)
return from;
int index;
if (named) {
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1]);
const Map<StringName, GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(identifier->name);
#ifdef DEBUG_ENABLED
if (MI && MI->get().getter == codegen.function_node->name) {
String n = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1])->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in getter.", on);
return -1;
}
#endif
if (MI && MI->get().getter == "") {
// Faster than indexing self (as if no self. had been used)
return (MI->get().index) | (GDScriptFunction::ADDR_TYPE_MEMBER << GDScriptFunction::ADDR_BITS);
}
}
index = codegen.get_name_map_pos(static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1])->name);
} else {
if (on->arguments[1]->type == GDScriptParser::Node::TYPE_CONSTANT && static_cast<const GDScriptParser::ConstantNode *>(on->arguments[1])->value.get_type() == Variant::STRING) {
//also, somehow, named (speed up anyway)
StringName name = static_cast<const GDScriptParser::ConstantNode *>(on->arguments[1])->value;
index = codegen.get_name_map_pos(name);
named = true;
} else {
//regular indexing
if (from & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
index = _parse_expression(codegen, on->arguments[1], slevel);
if (index < 0)
return index;
}
}
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_GET_NAMED : GDScriptFunction::OPCODE_GET); // perform operator
codegen.opcodes.push_back(from); // argument 1
codegen.opcodes.push_back(index); // argument 2 (unary only takes one parameter)
} break;
case GDScriptParser::OperatorNode::OP_AND: {
// AND operator with early out on failure
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos2 = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
codegen.opcodes.write[jump_fail_pos] = codegen.opcodes.size();
codegen.opcodes.write[jump_fail_pos2] = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
case GDScriptParser::OperatorNode::OP_OR: {
// OR operator with early out on success
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos2 = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
codegen.opcodes.write[jump_success_pos] = codegen.opcodes.size();
codegen.opcodes.write[jump_success_pos2] = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
// ternary operators
case GDScriptParser::OperatorNode::OP_TERNARY_IF: {
// x IF a ELSE y operator with early out on failure
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(res);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
int jump_past_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.opcodes.write[jump_fail_pos] = codegen.opcodes.size();
res = _parse_expression(codegen, on->arguments[2], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(res);
codegen.opcodes.write[jump_past_pos] = codegen.opcodes.size();
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
//unary operators
case GDScriptParser::OperatorNode::OP_NEG: {
if (!_create_unary_operator(codegen, on, Variant::OP_NEGATE, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_POS: {
if (!_create_unary_operator(codegen, on, Variant::OP_POSITIVE, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_NOT: {
if (!_create_unary_operator(codegen, on, Variant::OP_NOT, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_INVERT: {
if (!_create_unary_operator(codegen, on, Variant::OP_BIT_NEGATE, p_stack_level)) return -1;
} break;
//binary operators (in precedence order)
case GDScriptParser::OperatorNode::OP_IN: {
if (!_create_binary_operator(codegen, on, Variant::OP_IN, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_EQUAL, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_NOT_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_NOT_EQUAL, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_LESS: {
if (!_create_binary_operator(codegen, on, Variant::OP_LESS, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_LESS_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_LESS_EQUAL, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_GREATER: {
if (!_create_binary_operator(codegen, on, Variant::OP_GREATER, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_GREATER_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_GREATER_EQUAL, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_ADD: {
if (!_create_binary_operator(codegen, on, Variant::OP_ADD, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_SUB: {
if (!_create_binary_operator(codegen, on, Variant::OP_SUBTRACT, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_MUL: {
if (!_create_binary_operator(codegen, on, Variant::OP_MULTIPLY, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_DIV: {
if (!_create_binary_operator(codegen, on, Variant::OP_DIVIDE, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_MOD: {
if (!_create_binary_operator(codegen, on, Variant::OP_MODULE, p_stack_level)) return -1;
} break;
//case GDScriptParser::OperatorNode::OP_SHIFT_LEFT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_LEFT,p_stack_level)) return -1;} break;
//case GDScriptParser::OperatorNode::OP_SHIFT_RIGHT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_RIGHT,p_stack_level)) return -1;} break;
case GDScriptParser::OperatorNode::OP_BIT_AND: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_AND, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_OR: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_OR, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_XOR: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_XOR, p_stack_level)) return -1;
} break;
//shift
case GDScriptParser::OperatorNode::OP_SHIFT_LEFT: {
if (!_create_binary_operator(codegen, on, Variant::OP_SHIFT_LEFT, p_stack_level)) return -1;
} break;
case GDScriptParser::OperatorNode::OP_SHIFT_RIGHT: {
if (!_create_binary_operator(codegen, on, Variant::OP_SHIFT_RIGHT, p_stack_level)) return -1;
} break;
//assignment operators
case GDScriptParser::OperatorNode::OP_ASSIGN_ADD:
case GDScriptParser::OperatorNode::OP_ASSIGN_SUB:
case GDScriptParser::OperatorNode::OP_ASSIGN_MUL:
case GDScriptParser::OperatorNode::OP_ASSIGN_DIV:
case GDScriptParser::OperatorNode::OP_ASSIGN_MOD:
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_AND:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_OR:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_XOR:
case GDScriptParser::OperatorNode::OP_INIT_ASSIGN:
case GDScriptParser::OperatorNode::OP_ASSIGN: {
ERR_FAIL_COND_V(on->arguments.size() != 2, -1);
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_OPERATOR && (static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX || static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED)) {
// SET (chained) MODE!
#ifdef DEBUG_ENABLED
if (static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED) {
const GDScriptParser::OperatorNode *inon = static_cast<GDScriptParser::OperatorNode *>(on->arguments[0]);
if (inon->arguments[0]->type == GDScriptParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
const Map<StringName, GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(static_cast<GDScriptParser::IdentifierNode *>(inon->arguments[1])->name);
if (MI && MI->get().setter == codegen.function_node->name) {
String n = static_cast<GDScriptParser::IdentifierNode *>(inon->arguments[1])->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in setter.", inon);
return -1;
}
}
}
#endif
int slevel = p_stack_level;
GDScriptParser::OperatorNode *op = static_cast<GDScriptParser::OperatorNode *>(on->arguments[0]);
/* Find chain of sets */
StringName assign_property;
List<GDScriptParser::OperatorNode *> chain;
{
//create get/set chain
GDScriptParser::OperatorNode *n = op;
while (true) {
chain.push_back(n);
if (n->arguments[0]->type != GDScriptParser::Node::TYPE_OPERATOR) {
//check for a built-in property
if (n->arguments[0]->type == GDScriptParser::Node::TYPE_IDENTIFIER) {
GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(n->arguments[0]);
if (_is_class_member_property(codegen, identifier->name)) {
assign_property = identifier->name;
}
}
break;
}
n = static_cast<GDScriptParser::OperatorNode *>(n->arguments[0]);
if (n->op != GDScriptParser::OperatorNode::OP_INDEX && n->op != GDScriptParser::OperatorNode::OP_INDEX_NAMED)
break;
}
}
/* Chain of gets */
//get at (potential) root stack pos, so it can be returned
int prev_pos = _parse_expression(codegen, chain.back()->get()->arguments[0], slevel);
if (prev_pos < 0)
return prev_pos;
int retval = prev_pos;
if (retval & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
Vector<int> setchain;
if (assign_property != StringName()) {
// recover and assign at the end, this allows stuff like
// position.x+=2.0
// in Node2D
setchain.push_back(prev_pos);
setchain.push_back(codegen.get_name_map_pos(assign_property));
setchain.push_back(GDScriptFunction::OPCODE_SET_MEMBER);
}
for (List<GDScriptParser::OperatorNode *>::Element *E = chain.back(); E; E = E->prev()) {
if (E == chain.front()) //ignore first
break;
bool named = E->get()->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED;
int key_idx;
if (named) {
key_idx = codegen.get_name_map_pos(static_cast<const GDScriptParser::IdentifierNode *>(E->get()->arguments[1])->name);
//printf("named key %x\n",key_idx);
} else {
if (prev_pos & (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)) {
slevel++;
codegen.alloc_stack(slevel);
}
GDScriptParser::Node *key = E->get()->arguments[1];
key_idx = _parse_expression(codegen, key, slevel);
//printf("expr key %x\n",key_idx);
//stack was raised here if retval was stack but..
}
if (key_idx < 0) //error
return key_idx;
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_GET_NAMED : GDScriptFunction::OPCODE_GET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(key_idx);
slevel++;
codegen.alloc_stack(slevel);
int dst_pos = (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) | slevel;
codegen.opcodes.push_back(dst_pos);
//add in reverse order, since it will be reverted
setchain.push_back(dst_pos);
setchain.push_back(key_idx);
setchain.push_back(prev_pos);
setchain.push_back(named ? GDScriptFunction::OPCODE_SET_NAMED : GDScriptFunction::OPCODE_SET);
prev_pos = dst_pos;
}
setchain.invert();
int set_index;
bool named = false;
if (op->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED) {
set_index = codegen.get_name_map_pos(static_cast<const GDScriptParser::IdentifierNode *>(op->arguments[1])->name);
named = true;
} else {
set_index = _parse_expression(codegen, op->arguments[1], slevel + 1);
named = false;
}
if (set_index < 0) //error
return set_index;
if (set_index & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int set_value = _parse_assign_right_expression(codegen, on, slevel + 1);
if (set_value < 0) //error
return set_value;
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_SET_NAMED : GDScriptFunction::OPCODE_SET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(set_index);
codegen.opcodes.push_back(set_value);
for (int i = 0; i < setchain.size(); i++) {
codegen.opcodes.push_back(setchain[i]);
}
return retval;
} else if (on->arguments[0]->type == GDScriptParser::Node::TYPE_IDENTIFIER && _is_class_member_property(codegen, static_cast<GDScriptParser::IdentifierNode *>(on->arguments[0])->name)) {
//assignment to member property
int slevel = p_stack_level;
int src_address = _parse_assign_right_expression(codegen, on, slevel);
if (src_address < 0)
return -1;
StringName name = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[0])->name;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_SET_MEMBER);
codegen.opcodes.push_back(codegen.get_name_map_pos(name));
codegen.opcodes.push_back(src_address);
return GDScriptFunction::ADDR_TYPE_NIL << GDScriptFunction::ADDR_BITS;
} else {
//REGULAR ASSIGNMENT MODE!!
int slevel = p_stack_level;
int dst_address_a = _parse_expression(codegen, on->arguments[0], slevel, false, on->op == GDScriptParser::OperatorNode::OP_INIT_ASSIGN);
if (dst_address_a < 0)
return -1;
if (dst_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int src_address_b = _parse_assign_right_expression(codegen, on, slevel);
if (src_address_b < 0)
return -1;
GDScriptDataType assign_type = _gdtype_from_datatype(on->arguments[0]->get_datatype());
if (assign_type.has_type && !on->datatype.has_type) {
// Typed assignment
switch (assign_type.kind) {
case GDScriptDataType::BUILTIN: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_BUILTIN); // perform operator
codegen.opcodes.push_back(assign_type.builtin_type); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
case GDScriptDataType::NATIVE: {
int class_idx;
if (GDScriptLanguage::get_singleton()->get_global_map().has(assign_type.native_type)) {
class_idx = GDScriptLanguage::get_singleton()->get_global_map()[assign_type.native_type];
class_idx |= (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
} else {
_set_error("Invalid native class type '" + String(assign_type.native_type) + "'.", on->arguments[0]);
return -1;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_NATIVE); // perform operator
codegen.opcodes.push_back(class_idx); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
case GDScriptDataType::SCRIPT:
case GDScriptDataType::GDSCRIPT: {
Variant script = assign_type.script_type;
int idx = codegen.get_constant_pos(script);
idx |= GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS; //make it a local constant (faster access)
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_SCRIPT); // perform operator
codegen.opcodes.push_back(idx); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
default: {
ERR_PRINT("Compiler bug: unresolved assign.");
// Shouldn't get here, but fail-safe to a regular assignment
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN); // perform operator
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
}
}
} else {
// Either untyped assignment or already type-checked by the parser
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN); // perform operator
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
}
return dst_address_a; //if anything, returns wathever was assigned or correct stack position
}
} break;
case GDScriptParser::OperatorNode::OP_IS: {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
int slevel = p_stack_level;
int src_address_a = _parse_expression(codegen, on->arguments[0], slevel);
if (src_address_a < 0)
return -1;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
slevel++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen, on->arguments[1], slevel);
if (src_address_b < 0)
return -1;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_EXTENDS_TEST); // perform operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
} break;
case GDScriptParser::OperatorNode::OP_IS_BUILTIN: {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
ERR_FAIL_COND_V(on->arguments[1]->type != GDScriptParser::Node::TYPE_TYPE, false);
int slevel = p_stack_level;
int src_address_a = _parse_expression(codegen, on->arguments[0], slevel);
if (src_address_a < 0)
return -1;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
slevel++; //uses stack for return, increase stack
const GDScriptParser::TypeNode *tn = static_cast<const GDScriptParser::TypeNode *>(on->arguments[1]);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_IS_BUILTIN); // perform operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back((int)tn->vtype); // argument 2 (unary only takes one parameter)
} break;
default: {
ERR_FAIL_V_MSG(0, "Bug in bytecode compiler, unexpected operator #" + itos(on->op) + " in parse tree while parsing expression."); //unreachable code
} break;
}
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
//TYPE_TYPE,
default: {
ERR_FAIL_V_MSG(-1, "Bug in bytecode compiler, unexpected node in parse tree while parsing expression."); //unreachable code
} break;
}
}
Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::BlockNode *p_block, int p_stack_level, int p_break_addr, int p_continue_addr) {
codegen.push_stack_identifiers();
int new_identifiers = 0;
codegen.current_line = p_block->line;
for (int i = 0; i < p_block->statements.size(); i++) {
const GDScriptParser::Node *s = p_block->statements[i];
switch (s->type) {
case GDScriptParser::Node::TYPE_NEWLINE: {
#ifdef DEBUG_ENABLED
const GDScriptParser::NewLineNode *nl = static_cast<const GDScriptParser::NewLineNode *>(s);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_LINE);
codegen.opcodes.push_back(nl->line);
codegen.current_line = nl->line;
#endif
} break;
case GDScriptParser::Node::TYPE_CONTROL_FLOW: {
// try subblocks
const GDScriptParser::ControlFlowNode *cf = static_cast<const GDScriptParser::ControlFlowNode *>(s);
switch (cf->cf_type) {
case GDScriptParser::ControlFlowNode::CF_MATCH: {
GDScriptParser::MatchNode *match = cf->match;
GDScriptParser::IdentifierNode *id = memnew(GDScriptParser::IdentifierNode);
id->name = "#match_value";
// var #match_value
// copied because there is no _parse_statement :(
codegen.add_stack_identifier(id->name, p_stack_level++);
codegen.alloc_stack(p_stack_level);
new_identifiers++;
GDScriptParser::OperatorNode *op = memnew(GDScriptParser::OperatorNode);
op->op = GDScriptParser::OperatorNode::OP_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(match->val_to_match);
int ret = _parse_expression(codegen, op, p_stack_level);
if (ret < 0) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
// break address
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int break_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0); // break addr
for (int j = 0; j < match->compiled_pattern_branches.size(); j++) {
GDScriptParser::MatchNode::CompiledPatternBranch branch = match->compiled_pattern_branches[j];
// jump over continue
// jump unconditionally
// continue address
// compile the condition
int ret2 = _parse_expression(codegen, branch.compiled_pattern, p_stack_level);
if (ret2 < 0) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int continue_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
Error err = _parse_block(codegen, branch.body, p_stack_level, p_break_addr, continue_addr);
if (err) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(break_addr);
codegen.opcodes.write[continue_addr + 1] = codegen.opcodes.size();
}
codegen.opcodes.write[break_addr + 1] = codegen.opcodes.size();
memdelete(id);
memdelete(op);
} break;
case GDScriptParser::ControlFlowNode::CF_IF: {
int ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret2);
int else_addr = codegen.opcodes.size();
codegen.opcodes.push_back(0); //temporary
Error err = _parse_block(codegen, cf->body, p_stack_level, p_break_addr, p_continue_addr);
if (err)
return err;
if (cf->body_else) {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
int end_addr = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.opcodes.write[else_addr] = codegen.opcodes.size();
Error err2 = _parse_block(codegen, cf->body_else, p_stack_level, p_break_addr, p_continue_addr);
if (err2)
return err2;
codegen.opcodes.write[end_addr] = codegen.opcodes.size();
} else {
//end without else
codegen.opcodes.write[else_addr] = codegen.opcodes.size();
}
} break;
case GDScriptParser::ControlFlowNode::CF_FOR: {
int slevel = p_stack_level;
int iter_stack_pos = slevel;
int iterator_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
int counter_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
int container_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.alloc_stack(slevel);
codegen.push_stack_identifiers();
codegen.add_stack_identifier(static_cast<const GDScriptParser::IdentifierNode *>(cf->arguments[0])->name, iter_stack_pos);
int ret2 = _parse_expression(codegen, cf->arguments[1], slevel, false);
if (ret2 < 0)
return ERR_COMPILATION_FAILED;
//assign container
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(ret2);
//begin loop
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ITERATE_BEGIN);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(codegen.opcodes.size() + 4);
codegen.opcodes.push_back(iterator_pos);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(codegen.opcodes.size() + 8);
//break loop
int break_pos = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(0); //skip code for next
//next loop
int continue_pos = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ITERATE);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(break_pos);
codegen.opcodes.push_back(iterator_pos);
Error err = _parse_block(codegen, cf->body, slevel, break_pos, continue_pos);
if (err)
return err;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_pos);
codegen.opcodes.write[break_pos + 1] = codegen.opcodes.size();
codegen.pop_stack_identifiers();
} break;
case GDScriptParser::ControlFlowNode::CF_WHILE: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int break_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
int continue_addr = codegen.opcodes.size();
int ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(break_addr);
Error err = _parse_block(codegen, cf->body, p_stack_level, break_addr, continue_addr);
if (err)
return err;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_addr);
codegen.opcodes.write[break_addr + 1] = codegen.opcodes.size();
} break;
case GDScriptParser::ControlFlowNode::CF_BREAK: {
if (p_break_addr < 0) {
_set_error("'break'' not within loop", cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_break_addr);
} break;
case GDScriptParser::ControlFlowNode::CF_CONTINUE: {
if (p_continue_addr < 0) {
_set_error("'continue' not within loop", cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_continue_addr);
} break;
case GDScriptParser::ControlFlowNode::CF_RETURN: {
int ret2;
if (cf->arguments.size()) {
ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
} else {
ret2 = GDScriptFunction::ADDR_TYPE_NIL << GDScriptFunction::ADDR_BITS;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_RETURN);
codegen.opcodes.push_back(ret2);
} break;
}
} break;
case GDScriptParser::Node::TYPE_ASSERT: {
#ifdef DEBUG_ENABLED
// try subblocks
const GDScriptParser::AssertNode *as = static_cast<const GDScriptParser::AssertNode *>(s);
int ret2 = _parse_expression(codegen, as->condition, p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
int message_ret = 0;
if (as->message) {
message_ret = _parse_expression(codegen, as->message, p_stack_level + 1, false);
if (message_ret < 0)
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSERT);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(message_ret);
#endif
} break;
case GDScriptParser::Node::TYPE_BREAKPOINT: {
#ifdef DEBUG_ENABLED
// try subblocks
codegen.opcodes.push_back(GDScriptFunction::OPCODE_BREAKPOINT);
#endif
} break;
case GDScriptParser::Node::TYPE_LOCAL_VAR: {
const GDScriptParser::LocalVarNode *lv = static_cast<const GDScriptParser::LocalVarNode *>(s);
// since we are using properties now for most class access, allow shadowing of class members to make user's life easier.
//
//if (_is_class_member_property(codegen, lv->name)) {
// _set_error("Name for local variable '" + String(lv->name) + "' can't shadow class property of the same name.", lv);
// return ERR_ALREADY_EXISTS;
//}
codegen.add_stack_identifier(lv->name, p_stack_level++);
codegen.alloc_stack(p_stack_level);
new_identifiers++;
} break;
default: {
//expression
int ret2 = _parse_expression(codegen, s, p_stack_level, true);
if (ret2 < 0)
return ERR_PARSE_ERROR;
} break;
}
}
codegen.pop_stack_identifiers();
return OK;
}
Error GDScriptCompiler::_parse_function(GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::FunctionNode *p_func, bool p_for_ready) {
Vector<int> bytecode;
CodeGen codegen;
codegen.class_node = p_class;
codegen.script = p_script;
codegen.function_node = p_func;
codegen.stack_max = 0;
codegen.current_line = 0;
codegen.call_max = 0;
codegen.debug_stack = ScriptDebugger::get_singleton() != NULL;
Vector<StringName> argnames;
int stack_level = 0;
if (p_func) {
for (int i = 0; i < p_func->arguments.size(); i++) {
// since we are using properties now for most class access, allow shadowing of class members to make user's life easier.
//
//if (_is_class_member_property(p_script, p_func->arguments[i])) {
// _set_error("Name for argument '" + String(p_func->arguments[i]) + "' can't shadow class property of the same name.", p_func);
// return ERR_ALREADY_EXISTS;
//}
codegen.add_stack_identifier(p_func->arguments[i], i);
#ifdef TOOLS_ENABLED
argnames.push_back(p_func->arguments[i]);
#endif
}
stack_level = p_func->arguments.size();
}
codegen.alloc_stack(stack_level);
/* Parse initializer -if applies- */
bool is_initializer = !p_for_ready && !p_func;
if (is_initializer || (p_func && String(p_func->name) == "_init")) {
//parse initializer for class members
if (!p_func && p_class->extends_used && p_script->native.is_null()) {
//call implicit parent constructor
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_SELF_BASE);
codegen.opcodes.push_back(codegen.get_name_map_pos("_init"));
codegen.opcodes.push_back(0);
codegen.opcodes.push_back((GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) | 0);
}
Error err = _parse_block(codegen, p_class->initializer, stack_level);
if (err)
return err;
is_initializer = true;
}
if (p_for_ready || (p_func && String(p_func->name) == "_ready")) {
//parse initializer for class members
if (p_class->ready->statements.size()) {
Error err = _parse_block(codegen, p_class->ready, stack_level);
if (err)
return err;
}
}
/* Parse default argument code -if applies- */
Vector<int> defarg_addr;
StringName func_name;
if (p_func) {
if (p_func->default_values.size()) {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_TO_DEF_ARGUMENT);
defarg_addr.push_back(codegen.opcodes.size());
for (int i = 0; i < p_func->default_values.size(); i++) {
_parse_expression(codegen, p_func->default_values[i], stack_level, true);
defarg_addr.push_back(codegen.opcodes.size());
}
defarg_addr.invert();
}
Error err = _parse_block(codegen, p_func->body, stack_level);
if (err)
return err;
func_name = p_func->name;
} else {
if (p_for_ready)
func_name = "_ready";
else
func_name = "_init";
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_END);
/*
if (String(p_func->name)=="") { //initializer func
gdfunc = &p_script->initializer;
*/
//} else { //regular func
p_script->member_functions[func_name] = memnew(GDScriptFunction);
GDScriptFunction *gdfunc = p_script->member_functions[func_name];
//}
if (p_func) {
gdfunc->_static = p_func->_static;
gdfunc->rpc_mode = p_func->rpc_mode;
gdfunc->argument_types.resize(p_func->argument_types.size());
for (int i = 0; i < p_func->argument_types.size(); i++) {
gdfunc->argument_types.write[i] = _gdtype_from_datatype(p_func->argument_types[i]);
}
gdfunc->return_type = _gdtype_from_datatype(p_func->return_type);
} else {
gdfunc->_static = false;
gdfunc->rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
gdfunc->return_type = GDScriptDataType();
gdfunc->return_type.has_type = true;
gdfunc->return_type.kind = GDScriptDataType::BUILTIN;
gdfunc->return_type.builtin_type = Variant::NIL;
}
#ifdef TOOLS_ENABLED
gdfunc->arg_names = argnames;
#endif
//constants
if (codegen.constant_map.size()) {
gdfunc->_constant_count = codegen.constant_map.size();
gdfunc->constants.resize(codegen.constant_map.size());
gdfunc->_constants_ptr = gdfunc->constants.ptrw();
const Variant *K = NULL;
while ((K = codegen.constant_map.next(K))) {
int idx = codegen.constant_map[*K];
gdfunc->constants.write[idx] = *K;
}
} else {
gdfunc->_constants_ptr = NULL;
gdfunc->_constant_count = 0;
}
//global names
if (codegen.name_map.size()) {
gdfunc->global_names.resize(codegen.name_map.size());
gdfunc->_global_names_ptr = &gdfunc->global_names[0];
for (Map<StringName, int>::Element *E = codegen.name_map.front(); E; E = E->next()) {
gdfunc->global_names.write[E->get()] = E->key();
}
gdfunc->_global_names_count = gdfunc->global_names.size();
} else {
gdfunc->_global_names_ptr = NULL;
gdfunc->_global_names_count = 0;
}
#ifdef TOOLS_ENABLED
// Named globals
if (codegen.named_globals.size()) {
gdfunc->named_globals.resize(codegen.named_globals.size());
gdfunc->_named_globals_ptr = gdfunc->named_globals.ptr();
for (int i = 0; i < codegen.named_globals.size(); i++) {
gdfunc->named_globals.write[i] = codegen.named_globals[i];
}
gdfunc->_named_globals_count = gdfunc->named_globals.size();
}
#endif
if (codegen.opcodes.size()) {
gdfunc->code = codegen.opcodes;
gdfunc->_code_ptr = &gdfunc->code[0];
gdfunc->_code_size = codegen.opcodes.size();
} else {
gdfunc->_code_ptr = NULL;
gdfunc->_code_size = 0;
}
if (defarg_addr.size()) {
gdfunc->default_arguments = defarg_addr;
gdfunc->_default_arg_count = defarg_addr.size() - 1;
gdfunc->_default_arg_ptr = &gdfunc->default_arguments[0];
} else {
gdfunc->_default_arg_count = 0;
gdfunc->_default_arg_ptr = NULL;
}
gdfunc->_argument_count = p_func ? p_func->arguments.size() : 0;
gdfunc->_stack_size = codegen.stack_max;
gdfunc->_call_size = codegen.call_max;
gdfunc->name = func_name;
#ifdef DEBUG_ENABLED
if (ScriptDebugger::get_singleton()) {
String signature;
//path
if (p_script->get_path() != String())
signature += p_script->get_path();
//loc
if (p_func) {
signature += "::" + itos(p_func->body->line);
} else {
signature += "::0";
}
//function and class
if (p_class->name) {
signature += "::" + String(p_class->name) + "." + String(func_name);
} else {
signature += "::" + String(func_name);
}
gdfunc->profile.signature = signature;
}
#endif
gdfunc->_script = p_script;
gdfunc->source = source;
#ifdef DEBUG_ENABLED
{
gdfunc->func_cname = (String(source) + " - " + String(func_name)).utf8();
gdfunc->_func_cname = gdfunc->func_cname.get_data();
}
#endif
if (p_func) {
gdfunc->_initial_line = p_func->line;
#ifdef TOOLS_ENABLED
p_script->member_lines[func_name] = p_func->line;
#endif
} else {
gdfunc->_initial_line = 0;
}
if (codegen.debug_stack)
gdfunc->stack_debug = codegen.stack_debug;
if (is_initializer)
p_script->initializer = gdfunc;
return OK;
}
Error GDScriptCompiler::_parse_class_level(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
parsing_classes.insert(p_script);
if (p_class->owner && p_class->owner->owner) {
// Owner is not root
if (!parsed_classes.has(p_script->_owner)) {
if (parsing_classes.has(p_script->_owner)) {
_set_error("Cyclic class reference for '" + String(p_class->name) + "'.", p_class);
return ERR_PARSE_ERROR;
}
Error err = _parse_class_level(p_script->_owner, p_class->owner, p_keep_state);
if (err) {
return err;
}
}
}
p_script->native = Ref<GDScriptNativeClass>();
p_script->base = Ref<GDScript>();
p_script->_base = NULL;
p_script->members.clear();
p_script->constants.clear();
for (Map<StringName, GDScriptFunction *>::Element *E = p_script->member_functions.front(); E; E = E->next()) {
memdelete(E->get());
}
p_script->member_functions.clear();
p_script->member_indices.clear();
p_script->member_info.clear();
p_script->_signals.clear();
p_script->initializer = NULL;
p_script->tool = p_class->tool;
p_script->name = p_class->name;
Ref<GDScriptNativeClass> native;
GDScriptDataType base_type = _gdtype_from_datatype(p_class->base_type);
// Inheritance
switch (base_type.kind) {
case GDScriptDataType::NATIVE: {
int native_idx = GDScriptLanguage::get_singleton()->get_global_map()[base_type.native_type];
native = GDScriptLanguage::get_singleton()->get_global_array()[native_idx];
ERR_FAIL_COND_V(native.is_null(), ERR_BUG);
p_script->native = native;
} break;
case GDScriptDataType::GDSCRIPT: {
Ref<GDScript> base = base_type.script_type;
p_script->base = base;
p_script->_base = base.ptr();
p_script->member_indices = base->member_indices;
if (p_class->base_type.kind == GDScriptParser::DataType::CLASS) {
if (!parsed_classes.has(p_script->_base)) {
if (parsing_classes.has(p_script->_base)) {
_set_error("Cyclic class reference for '" + String(p_class->name) + "'.", p_class);
return ERR_PARSE_ERROR;
}
Error err = _parse_class_level(p_script->_base, p_class->base_type.class_type, p_keep_state);
if (err) {
return err;
}
}
}
} break;
default: {
_set_error("Parser bug: invalid inheritance.", p_class);
return ERR_BUG;
} break;
}
for (int i = 0; i < p_class->variables.size(); i++) {
StringName name = p_class->variables[i].identifier;
GDScript::MemberInfo minfo;
minfo.index = p_script->member_indices.size();
minfo.setter = p_class->variables[i].setter;
minfo.getter = p_class->variables[i].getter;
minfo.rpc_mode = p_class->variables[i].rpc_mode;
minfo.data_type = _gdtype_from_datatype(p_class->variables[i].data_type);
PropertyInfo prop_info = minfo.data_type;
prop_info.name = name;
PropertyInfo export_info = p_class->variables[i]._export;
if (export_info.type != Variant::NIL) {
if (!minfo.data_type.has_type) {
prop_info.type = export_info.type;
prop_info.class_name = export_info.class_name;
}
prop_info.hint = export_info.hint;
prop_info.hint_string = export_info.hint_string;
prop_info.usage = export_info.usage;
#ifdef TOOLS_ENABLED
if (p_class->variables[i].default_value.get_type() != Variant::NIL) {
p_script->member_default_values[name] = p_class->variables[i].default_value;
}
#endif
} else {
prop_info.usage = PROPERTY_USAGE_SCRIPT_VARIABLE;
}
p_script->member_info[name] = prop_info;
p_script->member_indices[name] = minfo;
p_script->members.insert(name);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = p_class->variables[i].line;
#endif
}
for (Map<StringName, GDScriptParser::ClassNode::Constant>::Element *E = p_class->constant_expressions.front(); E; E = E->next()) {
StringName name = E->key();
ERR_CONTINUE(E->get().expression->type != GDScriptParser::Node::TYPE_CONSTANT);
GDScriptParser::ConstantNode *constant = static_cast<GDScriptParser::ConstantNode *>(E->get().expression);
p_script->constants.insert(name, constant->value);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = E->get().expression->line;
#endif
}
for (int i = 0; i < p_class->_signals.size(); i++) {
StringName name = p_class->_signals[i].name;
GDScript *c = p_script;
while (c) {
if (c->_signals.has(name)) {
_set_error("Signal '" + name + "' redefined (in current or parent class)", p_class);
return ERR_ALREADY_EXISTS;
}
if (c->base.is_valid()) {
c = c->base.ptr();
} else {
c = NULL;
}
}
if (native.is_valid()) {
if (ClassDB::has_signal(native->get_name(), name)) {
_set_error("Signal '" + name + "' redefined (original in native class '" + String(native->get_name()) + "')", p_class);
return ERR_ALREADY_EXISTS;
}
}
p_script->_signals[name] = p_class->_signals[i].arguments;
}
parsed_classes.insert(p_script);
parsing_classes.erase(p_script);
//parse sub-classes
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
Ref<GDScript> &subclass = p_script->subclasses[name];
GDScript *subclass_ptr = subclass.ptr();
// Subclass might still be parsing, just skip it
if (!parsed_classes.has(subclass_ptr) && !parsing_classes.has(subclass_ptr)) {
Error err = _parse_class_level(subclass_ptr, p_class->subclasses[i], p_keep_state);
if (err)
return err;
}
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = p_class->subclasses[i]->line;
#endif
p_script->constants.insert(name, subclass); //once parsed, goes to the list of constants
}
return OK;
}
Error GDScriptCompiler::_parse_class_blocks(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
//parse methods
bool has_initializer = false;
bool has_ready = false;
for (int i = 0; i < p_class->functions.size(); i++) {
if (!has_initializer && p_class->functions[i]->name == "_init")
has_initializer = true;
if (!has_ready && p_class->functions[i]->name == "_ready")
has_ready = true;
Error err = _parse_function(p_script, p_class, p_class->functions[i]);
if (err)
return err;
}
//parse static methods
for (int i = 0; i < p_class->static_functions.size(); i++) {
Error err = _parse_function(p_script, p_class, p_class->static_functions[i]);
if (err)
return err;
}
if (!has_initializer) {
//create a constructor
Error err = _parse_function(p_script, p_class, NULL);
if (err)
return err;
}
if (!has_ready && p_class->ready->statements.size()) {
//create a constructor
Error err = _parse_function(p_script, p_class, NULL, true);
if (err)
return err;
}
#ifdef DEBUG_ENABLED
//validate instances if keeping state
if (p_keep_state) {
for (Set<Object *>::Element *E = p_script->instances.front(); E;) {
Set<Object *>::Element *N = E->next();
ScriptInstance *si = E->get()->get_script_instance();
if (si->is_placeholder()) {
#ifdef TOOLS_ENABLED
PlaceHolderScriptInstance *psi = static_cast<PlaceHolderScriptInstance *>(si);
if (p_script->is_tool()) {
//re-create as an instance
p_script->placeholders.erase(psi); //remove placeholder
GDScriptInstance *instance = memnew(GDScriptInstance);
instance->base_ref = Object::cast_to<Reference>(E->get());
instance->members.resize(p_script->member_indices.size());
instance->script = Ref<GDScript>(p_script);
instance->owner = E->get();
//needed for hot reloading
for (Map<StringName, GDScript::MemberInfo>::Element *F = p_script->member_indices.front(); F; F = F->next()) {
instance->member_indices_cache[F->key()] = F->get().index;
}
instance->owner->set_script_instance(instance);
/* STEP 2, INITIALIZE AND CONSTRUCT */
Variant::CallError ce;
p_script->initializer->call(instance, NULL, 0, ce);
if (ce.error != Variant::CallError::CALL_OK) {
//well, tough luck, not goinna do anything here
}
}
#endif
} else {
GDScriptInstance *gi = static_cast<GDScriptInstance *>(si);
gi->reload_members();
}
E = N;
}
}
#endif
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
GDScript *subclass = p_script->subclasses[name].ptr();
Error err = _parse_class_blocks(subclass, p_class->subclasses[i], p_keep_state);
if (err) {
return err;
}
}
p_script->valid = true;
return OK;
}
void GDScriptCompiler::_make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
Map<StringName, Ref<GDScript> > old_subclasses;
if (p_keep_state) {
old_subclasses = p_script->subclasses;
}
p_script->subclasses.clear();
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
Ref<GDScript> subclass;
if (old_subclasses.has(name)) {
subclass = old_subclasses[name];
} else {
subclass.instance();
}
subclass->_owner = p_script;
p_script->subclasses.insert(name, subclass);
_make_scripts(subclass.ptr(), p_class->subclasses[i], false);
}
}
Error GDScriptCompiler::compile(const GDScriptParser *p_parser, GDScript *p_script, bool p_keep_state) {
err_line = -1;
err_column = -1;
error = "";
parser = p_parser;
main_script = p_script;
const GDScriptParser::Node *root = parser->get_parse_tree();
ERR_FAIL_COND_V(root->type != GDScriptParser::Node::TYPE_CLASS, ERR_INVALID_DATA);
source = p_script->get_path();
// Create scripts for subclasses beforehand so they can be referenced
_make_scripts(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
p_script->_owner = NULL;
Error err = _parse_class_level(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
if (err)
return err;
err = _parse_class_blocks(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
if (err)
return err;
return OK;
}
String GDScriptCompiler::get_error() const {
return error;
}
int GDScriptCompiler::get_error_line() const {
return err_line;
}
int GDScriptCompiler::get_error_column() const {
return err_column;
}
GDScriptCompiler::GDScriptCompiler() {
}