From ced7617c3853d19ffa00a578e92ffd7c54b6c2fb Mon Sep 17 00:00:00 2001
From: Richard Smith <richard@metafoo.co.uk>
Date: Fri, 20 Mar 2020 18:44:13 -0700
Subject: [PATCH] PR45267: Don't reject pure-specifiers with escaped newlines
 in their '0' token.

---
 clang/lib/Parse/ParseDeclCXX.cpp | 2 +-
 clang/test/Parser/cxx-class.cpp  | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index 85dc4e3e706a..86a9a8208b2e 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -2670,7 +2670,7 @@ Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
 
     auto &Zero = NextToken();
     SmallString<8> Buffer;
-    if (Zero.isNot(tok::numeric_constant) || Zero.getLength() != 1 ||
+    if (Zero.isNot(tok::numeric_constant) ||
         PP.getSpelling(Zero, Buffer) != "0")
       return false;
 
diff --git a/clang/test/Parser/cxx-class.cpp b/clang/test/Parser/cxx-class.cpp
index e672c45068da..e73c8740a3ef 100644
--- a/clang/test/Parser/cxx-class.cpp
+++ b/clang/test/Parser/cxx-class.cpp
@@ -37,7 +37,9 @@ public:
   virtual int vf5a(){0;}; // function definition, expected-warning {{unused}}
   virtual int vf6()(0); // expected-error +{{}} expected-note +{{}}
   virtual int vf7() = { 0 }; // expected-error {{does not look like a pure-specifier}}
-  
+  virtual int PR45267() = \
+                        0; // ok, despite escaped newline
+
 private:
   int x,f(),y,g();
   inline int h();