[c++20] Add support for explicit(bool), as described in P0892R2.

Patch by Tyker!

Differential Revision: https://reviews.llvm.org/D60934

llvm-svn: 360311

1 files changed, 21 insertions, 2 deletions

diff --git a/clang/test/SemaCXX/explicit.cpp b/clang/test/SemaCXX/explicit.cpp
index a3902e5d10f..58760d347f0 100644
--- a/clang/test/SemaCXX/explicit.cpp
+++ b/clang/test/SemaCXX/explicit.cpp
@@ -1,4 +1,6 @@
 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s
+
 namespace Constructor {
 struct A {
   A(int);
@@ -34,6 +36,21 @@ B &&b3(0); // expected-error {{could not bind}}
 B b4{0};
 B &&b5 = {0}; // expected-error {{chosen constructor is explicit}}
 B &&b6{0};
+
+struct S {
+  template <bool b = true>
+  explicit S();
+};
+
+struct T : S {
+  //  T();
+};
+
+struct U : T {
+  U();
+};
+U::U() {}
+
 }
 
 namespace Conversion {
@@ -183,7 +200,8 @@ namespace Conversion {
     const int &copyList7 = {b};
     const int &copyList8 = {n}; // expected-error {{no viable conversion}}
   }
-  
+
+#if __cplusplus < 201707L
   void testNew()
   {
     // 5.3.4p6:
@@ -200,7 +218,8 @@ namespace Conversion {
     new int[i];
     new int[ni]; // expected-error {{array size expression of type 'NotInt' requires explicit conversion to type 'int'}}
   }
-  
+#endif
+
   void testDelete()
   {
     // 5.3.5pp2: