clang-format: Allow splitting "= default" and "= delete".

Otherwise, this can violate the column limit.

llvm-svn: 235592

clang/lib/Format/TokenAnnotator.cpp

@@ -2063,7 +2063,8 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
   if (Left.isOneOf(TT_TemplateCloser, TT_UnaryOperator) ||
       Left.is(tok::kw_operator))
     return false;
-  if (Left.is(tok::equal) && Line.Type == LT_VirtualFunctionDecl)
+  if (Left.is(tok::equal) && !Right.isOneOf(tok::kw_default, tok::kw_delete) &&
+      Line.Type == LT_VirtualFunctionDecl)
     return false;
   if (Left.is(tok::l_paren) && Left.is(TT_AttributeParen))
     return false;

clang/unittests/Format/FormatTest.cpp

@@ -2497,6 +2497,14 @@ TEST_F(FormatTest, FormatsSmallMacroDefinitionsInSingleLine) {
 TEST_F(FormatTest, DoesNotBreakPureVirtualFunctionDefinition) {
   verifyFormat("virtual void write(ELFWriter *writerrr,\n"
                "                   OwningPtr<FileOutputBuffer> &buffer) = 0;");
+
+  // Do break defaulted and deleted functions.
+  verifyFormat("virtual void ~Deeeeeeeestructor() =\n"
+               "    default;",
+               getLLVMStyleWithColumns(40));
+  verifyFormat("virtual void ~Deeeeeeeestructor() =\n"
+               "    delete;",
+               getLLVMStyleWithColumns(40));
 }
 
 TEST_F(FormatTest, BreaksStringLiteralsOnlyInDefine) {