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Functions are working, tests incomplete

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This required a massive cross-cutting rework to the scope system,
multiple subtle bugfixes and relearning of the parser internals, but it
does appear that functions are working correctly.

A few caveats: for now, parameters are always constant, regardless of
type, return values can't be specified, and some script tests have been
written.

Most importantly, a key feature is working: closures.
This commit is contained in:
Kayne Ruse
2026-04-12 11:47:26 +10:00
parent b0d9c15d33
commit c0c03a4110
18 changed files with 158 additions and 92 deletions
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20
source/toy_parser.c
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@@ -731,7 +731,7 @@ static Toy_AstFlag invoke(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast
//finally, emit the call as an Ast
Toy_private_emitAstFunctionInvokation(bucketHandle, rootHandle, args);
return TOY_AST_FLAG_NONE;
return TOY_AST_FLAG_INVOKATION;
}
//grammar rules
@@ -964,25 +964,23 @@ static void makeFunctionDeclarationStmt(Toy_Bucket** bucketHandle, Toy_Parser* p
advance(parser);
Toy_Token nameToken = parser->previous;
//TODO: fix this with param type info
//URGENT: fix this with param type info
//read the type specifier if present
// Toy_ValueType varType = TOY_VALUE_ANY;
// bool constant = true; //parameters are immutable
Toy_ValueType varType = TOY_VALUE_ANY;
bool constant = true; //parameters are immutable
if (match(parser, TOY_TOKEN_OPERATOR_COLON)) {
// varType = readType(parser);
readType(parser);
varType = readType(parser);
if (match(parser, TOY_TOKEN_KEYWORD_CONST)) {
// constant = true;
constant = true;
}
}
//emit the parameter as a name string
Toy_String* name = Toy_toStringLength(bucketHandle, nameToken.lexeme, nameToken.length);
Toy_Value value = TOY_VALUE_FROM_STRING(name);
//emit the parameter as a var declaration
Toy_Ast* ast = NULL;
Toy_private_emitAstValue(bucketHandle, &ast, value); //TODO: params with type info
Toy_String* name = Toy_toStringLength(bucketHandle, nameToken.lexeme, nameToken.length);
Toy_private_emitAstVariableDeclaration(bucketHandle, &ast, name, varType, constant, NULL);
//add to the params aggregate (is added backwards, because weird)
Toy_private_emitAstAggregate(bucketHandle, &params, TOY_AST_FLAG_COLLECTION, ast);