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Better error messages for table[key] += ...

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This commit is contained in:
Bruce Hill 2024-11-30 15:54:21 -05:00
parent 40c33987fa
commit 919e47a418
1 changed files with 14 additions and 0 deletions
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14
compile.c
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@ -618,6 +618,13 @@ CORD compile_statement(env_t *env, ast_t *ast)
} else if (test->expr->tag == UpdateAssign) {
type_t *lhs_t = get_type(env, Match(test->expr, UpdateAssign)->lhs);
auto update = Match(test->expr, UpdateAssign);
if (update->lhs->tag == Index) {
type_t *indexed = value_type(get_type(env, Match(update->lhs, Index)->indexed));
if (indexed->tag == TableType)
code_err(update->lhs, "Update assignments are not currently supported for tables");
}
ast_t *update_var = WrapAST(ast, UpdateAssign,
.lhs=WrapAST(update->lhs, InlineCCode, .code="(*expr)", .type=lhs_t),
.op=update->op, .rhs=update->rhs);
@ -692,6 +699,13 @@ CORD compile_statement(env_t *env, ast_t *ast)
}
case UpdateAssign: {
auto update = Match(ast, UpdateAssign);
if (update->lhs->tag == Index) {
type_t *indexed = value_type(get_type(env, Match(update->lhs, Index)->indexed));
if (indexed->tag == TableType)
code_err(update->lhs, "Update assignments are not currently supported for tables");
}
if (!is_idempotent(update->lhs)) {
type_t *lhs_t = get_type(env, update->lhs);
return CORD_all("{ ", compile_declaration(Type(PointerType, lhs_t), "update_lhs"), " = &",