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Implemented the attribute operator, using a period

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This commit is contained in:
Kayne Ruse
2026-04-24 11:31:54 +10:00
parent d2ac1eeb8e
commit 9a75226491
7 changed files with 94 additions and 1 deletions
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source/toy_parser.c
+27 -1
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@@ -121,6 +121,7 @@ static Toy_AstFlag compound(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_A
static Toy_AstFlag aggregate(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag unaryPostfix(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag invoke(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag attribute(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
//precedence definitions
static ParsingTuple parsingRulesetTable[] = {
@@ -212,7 +213,7 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_SEMICOLON,
{PREC_GROUP,NULL,aggregate},// TOY_TOKEN_OPERATOR_COMMA,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_DOT,
{PREC_CALL,NULL,attribute},// TOY_TOKEN_OPERATOR_DOT,
{PREC_UNARY,NULL,binary},// TOY_TOKEN_OPERATOR_CONCAT,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_REST,
@@ -734,6 +735,31 @@ static Toy_AstFlag invoke(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast
return TOY_AST_FLAG_INVOKATION;
}
static Toy_AstFlag attribute(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
//infix must advance
advance(parser);
if (parser->previous.type == TOY_TOKEN_OPERATOR_DOT) {
Toy_Ast* expr = NULL;
parsePrecedence(bucketHandle, parser, &expr, PREC_PRIMARY);
//hijack access node and take the value (presumably an identifier)
if (expr->type != TOY_AST_VAR_ACCESS || expr->varAccess.child == NULL || expr->varAccess.child->type != TOY_AST_VALUE) {
printError(parser, parser->previous, "Malformed expression passed to attribute precedence rule");
Toy_private_emitAstError(bucketHandle, rootHandle);
return TOY_AST_FLAG_NONE;
}
Toy_private_emitAstAttribute(bucketHandle, rootHandle, expr->varAccess.child);
return TOY_AST_FLAG_NONE;
}
else {
printError(parser, parser->previous, "Unexpected token passed to attribute precedence rule");
Toy_private_emitAstError(bucketHandle, rootHandle);
return TOY_AST_FLAG_NONE;
}
}
//grammar rules
static void parsePrecedence(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle, ParsingPrecedence precRule) {
//'step over' the token to parse