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Prefix '++' working (postfix is next)

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Kayne Ruse
2025-01-09 16:45:48 +11:00
parent 3aee2ba664
commit 6f16c31f24
7 changed files with 102 additions and 79 deletions
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24
source/toy_parser.c
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@@ -180,8 +180,8 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_MULTIPLY_ASSIGN,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_DIVIDE_ASSIGN,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_MODULO_ASSIGN,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_INCREMENT,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_DECREMENT,
{PREC_CALL,unary,NULL},// TOY_TOKEN_OPERATOR_INCREMENT,
{PREC_CALL,unary,NULL},// TOY_TOKEN_OPERATOR_DECREMENT,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_ASSIGN,
//comparator operators
@@ -419,6 +419,26 @@ static Toy_AstFlag unary(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast*
Toy_private_emitAstUnary(bucketHandle, rootHandle, TOY_AST_FLAG_NEGATE);
}
else if (parser->previous.type == TOY_TOKEN_OPERATOR_INCREMENT || parser->previous.type == TOY_TOKEN_OPERATOR_DECREMENT) {
Toy_AstFlag flag = parser->previous.type == TOY_TOKEN_OPERATOR_INCREMENT ? TOY_AST_FLAG_PREFIX_INCREMENT : TOY_AST_FLAG_PREFIX_DECREMENT;
//grab the info below
Toy_Ast* primary = NULL;
parsePrecedence(bucketHandle, parser, &primary, PREC_PRIMARY);
//double check it's a name string within an access NOTE: doing some fiddling with the existing AST here
if (primary->type != TOY_AST_VAR_ACCESS || primary->varAccess.child->type != TOY_AST_VALUE || TOY_VALUE_IS_STRING(primary->varAccess.child->value.value) != true || TOY_VALUE_AS_STRING(primary->varAccess.child->value.value)->info.type != TOY_STRING_NAME) {
printError(parser, parser->previous, "Unexpected non-name-string token in unary operator increment precedence rule");
Toy_private_emitAstError(bucketHandle, rootHandle);
}
else {
//swap the varAccess for a unary prefix, as the latter leaves the value on the stack
*rootHandle = primary->varAccess.child;
Toy_private_emitAstUnary(bucketHandle, rootHandle, flag);
}
}
else {
printError(parser, parser->previous, "Unexpected token passed to unary precedence rule");
Toy_private_emitAstError(bucketHandle, rootHandle);