Stowage/godot
2
0
Fork 0
mirror of https://github.com/godotengine/godot.git synced 2025-10-23 01:43:36 +00:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request #6845 from karroffel/master

Browse source 
Adds pattern matching to GDScript
This commit is contained in:
Juan Linietsky 2017-01-14 17:08:10 -03:00 • committed by GitHub
commit 4261880c94
6 changed files with 696 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

65
modules/gdscript/gd_compiler.cpp
View file

@ -1099,7 +1099,72 @@ Error GDCompiler::_parse_block(CodeGen& codegen,const GDParser::BlockNode *p_blo
switch(cf->cf_type) {
case GDParser::ControlFlowNode::CF_MATCH: {
GDParser::MatchNode *match = cf->match;
GDParser::IdentifierNode *id = memnew(GDParser::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++;
GDParser::OperatorNode *op = memnew(GDParser::OperatorNode);
op->op=GDParser::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) {
return ERR_PARSE_ERROR;
}
// break address
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int break_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0); // break addr
for (int j = 0; j < match->compiled_pattern_branches.size(); j++) {
GDParser::MatchNode::CompiledPatternBranch branch = match->compiled_pattern_branches[j];
// jump over continue
// jump unconditionally
// continue address
// compile the condition
int ret = _parse_expression(codegen, branch.compiled_pattern, p_stack_level);
if (ret < 0) {
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(ret);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int continue_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
Error err = _parse_block(codegen, branch.body, p_stack_level, p_break_addr, continue_addr);
if (err) {
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(break_addr);
codegen.opcodes[continue_addr + 1] = codegen.opcodes.size();
}
codegen.opcodes[break_addr + 1] = codegen.opcodes.size();
} break;
case GDParser::ControlFlowNode::CF_IF: {
#ifdef DEBUG_ENABLED