[clang-format] Insert a space between l_paren and ref-qualifier (#111465)

Fixes #111346.

Author: owenca

clang/lib/Format/TokenAnnotator.cpp

@@ -5454,6 +5454,10 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
   }
   if ((Left.is(TT_TemplateOpener)) != (Right.is(TT_TemplateCloser)))
     return ShouldAddSpacesInAngles();
+  if (Left.is(tok::r_paren) && Right.is(TT_PointerOrReference) &&
+      Right.isOneOf(tok::amp, tok::ampamp)) {
+    return true;
+  }
   // Space before TT_StructuredBindingLSquare.
   if (Right.is(TT_StructuredBindingLSquare)) {
     return !Left.isOneOf(tok::amp, tok::ampamp) ||

clang/unittests/Format/FormatTest.cpp

@@ -11519,6 +11519,7 @@ TEST_F(FormatTest, UnderstandsFunctionRefQualification) {
                AlignLeft);
   verifyFormat("template <typename T> void operator=(T) & {}", AlignLeft);
   verifyFormat("template <typename T> void operator=(T) && {}", AlignLeft);
+  verifyFormat("for (foo<void() &&>& cb : X)", AlignLeft);
 
   FormatStyle AlignMiddle = getLLVMStyle();
   AlignMiddle.PointerAlignment = FormatStyle::PAS_Middle;