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GDScript: Forbid invalid identifiers in match bindings

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Also forbid shadowing a variable from an upper scope.
This commit is contained in:
George Marques
2018-08-21 13:38:18 -03:00
parent d97624e295
commit abbdb9d951
1 changed files with 12 additions and 4 deletions
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16
modules/gdscript/gdscript_parser.cpp
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@@ -2024,12 +2024,20 @@ GDScriptParser::PatternNode *GDScriptParser::_parse_pattern(bool p_static) {
// bind
case GDScriptTokenizer::TK_PR_VAR: {
tokenizer->advance();
if (!tokenizer->is_token_literal()) {
_set_error("Expected identifier for binding variable name.");
return NULL;
}
pattern->pt_type = GDScriptParser::PatternNode::PT_BIND;
pattern->bind = tokenizer->get_token_identifier();
// Check if binding is already used
if (current_block->variables.has(pattern->bind)) {
_set_error("Binding name of '" + pattern->bind.operator String() + "' was already used in the pattern.");
return NULL;
// Check if variable name is already used
BlockNode *bl = current_block;
while (bl) {
if (bl->variables.has(pattern->bind)) {
_set_error("Binding name of '" + pattern->bind.operator String() + "' is already declared in this scope.");
return NULL;
}
bl = bl->parent_block;
}
// Create local variable for proper identifier detection later
LocalVarNode *lv = alloc_node<LocalVarNode>();