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Fix issue #31; Removed down_cast

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This commit is contained in:
Ginger Bill
2017-04-04 21:54:55 +01:00
parent 382a5ca6a2
commit 3e80411d37
7 changed files with 70 additions and 75 deletions
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src/check_expr.c
+1 -66
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@@ -3950,7 +3950,7 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
id == BuiltinProc_kmag) {
if (!is_type_quaternion(x->type)) {
gbString s = type_to_string(x->type);
error_node(call, "Argument has type `%s`, expected a complex type", s);
error_node(call, "Argument has type `%s`, expected a quaternion type", s);
gb_string_free(s);
return false;
}
@@ -5455,71 +5455,6 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
o->type = t;
o->mode = Addressing_OptionalOk;
} break;
case Token_down_cast: {
if (o->mode == Addressing_Constant) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Cannot `down_cast` a constant expression: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
if (is_type_untyped(o->type)) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Cannot `down_cast` an untyped expression: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
if (!(is_type_pointer(o->type) && is_type_pointer(t))) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Can only `down_cast` pointers: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
Type *src = type_deref(o->type);
Type *dst = type_deref(t);
Type *bsrc = base_type(src);
Type *bdst = base_type(dst);
if (!(is_type_struct(bsrc) || is_type_raw_union(bsrc))) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Can only `down_cast` pointer from structs or unions: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
if (!(is_type_struct(bdst) || is_type_raw_union(bdst))) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Can only `down_cast` pointer to structs or unions: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
String param_name = check_down_cast_name(dst, src);
if (param_name.len == 0) {
gbString expr_str = expr_to_string(o->expr);
error_node(o->expr, "Illegal `down_cast`: `%s`", expr_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
o->mode = Addressing_Value;
o->type = t;
} break;
default:
GB_PANIC("Unknown cast expression");