[clang-format] Don't insert space between r_paren and 'new' in ObjC decl

Summary:
Previously, clang-format would insert a space between
the closing parenthesis and 'new' in the following valid Objective-C
declaration:

  + (instancetype)new;

This was because 'new' is treated as a keyword, not an identifier.

TokenAnnotator::spaceRequiredBefore() already handled the case where
r_paren came before an identifier, so this diff extends it to
handle r_paren before 'new'.

Test Plan: New tests added. Ran tests with:
  % make -j12 FormatTests && ./tools/clang/unittests/Format/FormatTests

Reviewers: djasper, jolesiak, stephanemoore

Reviewed By: djasper, jolesiak, stephanemoore

Subscribers: stephanemoore, klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D44692

llvm-svn: 328174

2 files changed, 16 insertions, 2 deletions

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 7734b7e9a2b..681e790f877 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -2615,8 +2615,10 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
   if (Line.Type == LT_ObjCMethodDecl) {
     if (Left.is(TT_ObjCMethodSpecifier))
       return true;
-    if (Left.is(tok::r_paren) && Right.is(tok::identifier))
-      // Don't space between ')' and <id>
+    if (Left.is(tok::r_paren) && Right.isOneOf(tok::identifier, tok::kw_new))
+      // Don't space between ')' and <id> or ')' and 'new'. 'new' is not a
+      // keyword in Objective-C, and '+ (instancetype)new;' is a standard class
+      // method declaration.
       return false;
   }
   if (Line.Type == LT_ObjCProperty &&
diff --git a/clang/unittests/Format/FormatTestObjC.cpp b/clang/unittests/Format/FormatTestObjC.cpp
index 35c4d886386..51443c0f393 100644
--- a/clang/unittests/Format/FormatTestObjC.cpp
+++ b/clang/unittests/Format/FormatTestObjC.cpp
@@ -514,6 +514,7 @@ TEST_F(FormatTestObjC, FormatObjCMethodDeclarations) {
                "    evenLongerKeyword:(float)theInterval\n"
                "                error:(NSError **)theError {\n"
                "}");
+  verifyFormat("+ (instancetype)new;\n");
   Style.ColumnLimit = 60;
   verifyFormat("- (instancetype)initXxxxxx:(id<x>)x\n"
                "                         y:(id<yyyyyyyyyyyyyyyyyyyy>)y\n"
@@ -914,6 +915,17 @@ TEST_F(FormatTestObjC, ObjCForIn) {
                "     }]) {\n}");
 }
 
+TEST_F(FormatTestObjC, ObjCNew) {
+  verifyFormat("+ (instancetype)new {\n"
+               "  return nil;\n"
+               "}\n");
+  verifyFormat("+ (instancetype)myNew {\n"
+               "  return [self new];\n"
+               "}\n");
+  verifyFormat("SEL NewSelector(void) { return @selector(new); }\n");
+  verifyFormat("SEL MacroSelector(void) { return MACRO(new); }\n");
+}
+
 TEST_F(FormatTestObjC, ObjCLiterals) {
   verifyFormat("@\"String\"");
   verifyFormat("@1");