[PATCH] D113245: [Sema] Mark explicit specialization declaration in a friend invalid

[Yuanfang Chen via Phabricator via cfe-commits]

ychen updated this revision to Diff 394352.
ychen added a comment.

- format


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D113245/new/

https://reviews.llvm.org/D113245

Files:
  clang/lib/Sema/SemaDecl.cpp
  clang/test/CXX/temp/temp.spec/temp.expl.spec/p20-2.cpp


Index: clang/test/CXX/temp/temp.spec/temp.expl.spec/p20-2.cpp
===================================================================
--- /dev/null
+++ clang/test/CXX/temp/temp.spec/temp.expl.spec/p20-2.cpp
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+template<typename T>
+void f(T);
+
+template<typename T>
+struct A {
+  // expected-error@+1{{cannot declare an explicit specialization in a friend}}
+  template <> friend void f<>(int) {}
+};
+
+// Makes sure implicit instantiation here does not trigger
+// the assertion "Member specialization must be an explicit specialization"
+void foo(void) {
+    A<int> a;
+}
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -9195,6 +9195,7 @@
             << Name << RemoveRange
             << FixItHint::CreateRemoval(RemoveRange)
             << FixItHint::CreateInsertion(InsertLoc, "<>");
+          Invalid = true;
         }
       }
     } else {



Index: clang/test/CXX/temp/temp.spec/temp.expl.spec/p20-2.cpp
===================================================================
--- /dev/null
+++ clang/test/CXX/temp/temp.spec/temp.expl.spec/p20-2.cpp
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+template<typename T>
+void f(T);
+
+template<typename T>
+struct A {
+  // expected-error@+1{{cannot declare an explicit specialization in a friend}}
+  template <> friend void f<>(int) {}
+};
+
+// Makes sure implicit instantiation here does not trigger
+// the assertion "Member specialization must be an explicit specialization"
+void foo(void) {
+    A<int> a;
+}
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -9195,6 +9195,7 @@
             << Name << RemoveRange
             << FixItHint::CreateRemoval(RemoveRange)
             << FixItHint::CreateInsertion(InsertLoc, "<>");
+          Invalid = true;
         }
       }
     } else {

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