[PATCH] D44638: [clang-format] Fix ObjC selectors with multiple params passed to macro

[Ben Hamilton via Phabricator via cfe-commits]

benhamilton created this revision.
benhamilton added reviewers: jolesiak, djasper, Wizard.
Herald added subscribers: cfe-commits, klimek.

Objective-C selectors can with arguments be in the form:

foo:
foo:bar:
foo:bar:baz:

These can be passed to a macro, like NS_SWIFT_NAME():

https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html

and must never have spaces inserted around the colons.

Previously, there was logic in TokenAnnotator's tok::colon parser to
handle the single-argument case, but it failed for the
multiple-argument cases.

This diff fixes the bug and adds more tests.

Test Plan: New tests added. Ran tests with:

  % make -j12 FormatTests && ./tools/clang/unittests/Format/FormatTests


Repository:
  rC Clang

https://reviews.llvm.org/D44638

Files:
  lib/Format/TokenAnnotator.cpp
  unittests/Format/FormatTestObjC.cpp


Index: unittests/Format/FormatTestObjC.cpp
===================================================================
--- unittests/Format/FormatTestObjC.cpp
+++ unittests/Format/FormatTestObjC.cpp
@@ -618,6 +618,9 @@
   verifyFormat("for (id foo in [self getStuffFor:bla]) {\n"
                "}");
   verifyFormat("[self aaaaa:MACRO(a, b:, c:)];");
+  verifyFormat("[self aaaaa:MACRO(a, b:c:, d:e:)];");
+  verifyFormat("[self aaaaa:MACRO(a, b:c:d:, e:f:g:)];");
+  verifyFormat("int XYMyFoo(int a, int b) NS_SWIFT_NAME(foo(self:scale:));");
   verifyFormat("[self aaaaa:(1 + 2) bbbbb:3];");
   verifyFormat("[self aaaaa:(Type)a bbbbb:3];");
 
Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -701,7 +701,8 @@
         else
           Tok->Type = TT_InheritanceColon;
       } else if (Tok->Previous->is(tok::identifier) && Tok->Next &&
-                 Tok->Next->isOneOf(tok::r_paren, tok::comma)) {
+                 (Tok->Next->isOneOf(tok::r_paren, tok::comma) ||
+                  Tok->Next->startsSequence(tok::identifier, tok::colon))) {
         // This handles a special macro in ObjC code where selectors including
         // the colon are passed as macro arguments.
         Tok->Type = TT_ObjCMethodExpr;


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