[clang] [clang] Fix assertion failure with explicit(bool) in pre-C++11 modes (PR #152985)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,14 @@
+// Regression test for assertion failure when explicit(bool) is used in pre-C++20
+// Fixes GitHub issue #152729
+// RUN: %clang_cc1 -std=c++03 -verify %s
+// RUN: %clang_cc1 -std=c++11 -verify %s
+// RUN: %clang_cc1 -std=c++14 -verify %s
+// RUN: %clang_cc1 -std=c++17 -verify %s
+
+struct S {
+  explicit(true) S(int);
+  // expected-warning at -1 {{explicit(bool) is a C++20 extension}}
+  
+  explicit(false) S(float);
+  // expected-warning at -1 {{explicit(bool) is a C++20 extension}}
+};
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AaronBallman wrote:

Can you add a newline to the end of the file?

https://github.com/llvm/llvm-project/pull/152985