================
@@ -0,0 +1,22 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++14 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++17 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++20 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++23 %s
+
+// Test that 'auto' cannot be combined with a type specifier in C++.
+void f() {
+ auto int x = 1; // expected-error {{'auto' cannot be combined with a
type specifier}}
----------------
zygoloid wrote:
We can definitely detect that there's both an `auto` here and another kind of
type-specifier during parsing. (We don't even have a way to represent that
combination in an AST, so we can't detect this during instantiation.)
https://github.com/llvm/llvm-project/pull/166004
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