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Add type assertion for any

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This commit is contained in:
Ginger Bill
2017-04-30 15:29:46 +01:00
parent 784f3ecf7e
commit e63393e394
2 changed files with 103 additions and 29 deletions
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src/check_expr.c
+33 -27
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@@ -5583,38 +5583,44 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
return kind;
}
if (!is_type_union(src)) {
if (is_type_union(src)) {
bool ok = false;
for (isize i = 1; i < bsrc->Record.variant_count; i++) {
Entity *f = bsrc->Record.variants[i];
if (are_types_identical(f->type, dst)) {
ok = true;
break;
}
}
if (!ok) {
gbString expr_str = expr_to_string(o->expr);
gbString dst_type_str = type_to_string(t);
error_node(o->expr, "Cannot type assert `%s` to `%s`", expr_str, dst_type_str);
gb_string_free(dst_type_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
add_type_info_type(c, o->type);
add_type_info_type(c, t);
o->type = t;
o->mode = Addressing_OptionalOk;
} else if (is_type_any(o->type)) {
o->type = t;
o->mode = Addressing_OptionalOk;
add_type_info_type(c, o->type);
add_type_info_type(c, t);
} else {
error_node(o->expr, "Type assertions can only operate on unions");
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
bool ok = false;
for (isize i = 1; i < bsrc->Record.variant_count; i++) {
Entity *f = bsrc->Record.variants[i];
if (are_types_identical(f->type, dst)) {
ok = true;
break;
}
}
if (!ok) {
gbString expr_str = expr_to_string(o->expr);
gbString dst_type_str = type_to_string(t);
error_node(o->expr, "Cannot type assert `%s` to `%s`", expr_str, dst_type_str);
gb_string_free(dst_type_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
add_type_info_type(c, o->type);
add_type_info_type(c, t);
o->type = t;
o->mode = Addressing_OptionalOk;
case_end;
case_ast_node(ue, UnaryExpr, node);