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Fix issue #78 and have a better error message.

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This commit is contained in:
Ginger Bill
2017-07-13 11:35:01 +01:00
parent b5587f1937
commit 03570275c1
2 changed files with 5 additions and 3 deletions
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6
src/check_expr.cpp
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@@ -6980,7 +6980,7 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
if (!ok) {
gbString expr_str = expr_to_string(o->expr);
gbString dst_type_str = type_to_string(t);
error(o->expr, "Cannot type assert `%s` to `%s`", expr_str, dst_type_str);
error(o->expr, "Cannot type assert `%s` to `%s` as it is not a variant of that union", expr_str, dst_type_str);
gb_string_free(dst_type_str);
gb_string_free(expr_str);
o->mode = Addressing_Invalid;
@@ -7000,7 +7000,9 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
add_type_info_type(c, o->type);
add_type_info_type(c, t);
} else {
error(o->expr, "Type assertions can only operate on unions and `any`");
gbString str = type_to_string(o->type);
error(o->expr, "Type assertions can only operate on unions and `any`, got %s", str);
gb_string_free(str);
o->mode = Addressing_Invalid;
o->expr = node;
return kind;