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-rw-r--r--src/check_decl.cpp5
-rw-r--r--src/check_stmt.cpp6
2 files changed, 10 insertions, 1 deletions
diff --git a/src/check_decl.cpp b/src/check_decl.cpp
index 9d043e60a..bb56749af 100644
--- a/src/check_decl.cpp
+++ b/src/check_decl.cpp
@@ -1488,6 +1488,11 @@ void check_proc_body(CheckerContext *ctx_, Token token, DeclInfo *decl, Type *ty
if (!(e->flags & EntityFlag_Using)) {
continue;
}
+ if (is_blank_ident(e->token)) {
+ error(e->token, "'using' a procedure parameter requires a non blank identifier");
+ break;
+ }
+
bool is_value = (e->flags & EntityFlag_Value) != 0 && !is_type_pointer(e->type);
String name = e->token.string;
Type *t = base_type(type_deref(e->type));
diff --git a/src/check_stmt.cpp b/src/check_stmt.cpp
index 630182273..9cacb4a35 100644
--- a/src/check_stmt.cpp
+++ b/src/check_stmt.cpp
@@ -584,7 +584,11 @@ void check_label(CheckerContext *ctx, Ast *label, Ast *parent) {
// Returns 'true' for 'continue', 'false' for 'return'
bool check_using_stmt_entity(CheckerContext *ctx, AstUsingStmt *us, Ast *expr, bool is_selector, Entity *e) {
if (e == nullptr) {
- error(us->token, "'using' applied to an unknown entity");
+ if (is_blank_ident(expr)) {
+ error(us->token, "'using' in a statement is not allowed with the blank identifier '_'");
+ } else {
+ error(us->token, "'using' applied to an unknown entity");
+ }
return true;
}