[PATCH] D52842: clang-format: Don't insert spaces in front of :: for Java 8 Method References.

[Nico Weber via Phabricator via cfe-commits]

thakis updated this revision to Diff 168161.
thakis edited the summary of this revision.

https://reviews.llvm.org/D52842

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


Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -2553,8 +2553,10 @@
     return false;
   if (Left.is(TT_TemplateCloser) && Left.MatchingParen &&
       Left.MatchingParen->Previous &&
-      Left.MatchingParen->Previous->is(tok::period))
+      (Left.MatchingParen->Previous->is(tok::period) ||
+       Left.MatchingParen->Previous->is(tok::coloncolon)))
     // A.<B<C<...>>>DoSomething();
+    // A::<B<C<...>>>DoSomething();
     return false;
   if (Left.is(TT_TemplateCloser) && Right.is(tok::l_square))
     return false;
@@ -2774,6 +2776,9 @@
   if (!Style.SpaceBeforeAssignmentOperators &&
       Right.getPrecedence() == prec::Assignment)
     return false;
+  if (Style.Language == FormatStyle::LK_Java && Right.is(tok::coloncolon) &&
+      (Left.is(tok::identifier) || Left.is(tok::kw_this)))
+    return false;
   if (Right.is(tok::coloncolon) && Left.is(tok::identifier))
     // Generally don't remove existing spaces between an identifier and "::".
     // The identifier might actually be a macro name such as ALWAYS_INLINE. If
Index: unittests/Format/FormatTestJava.cpp
===================================================================
--- unittests/Format/FormatTestJava.cpp
+++ unittests/Format/FormatTestJava.cpp
@@ -443,6 +443,22 @@
                getStyleWithColumns(40));
 }
 
+TEST_F(FormatTestJava, MethodReference) {
+  EXPECT_EQ(
+      "private void foo() {\n"
+      "  f(this::methodReference);\n"
+      "  f(C.super::methodReference);\n"
+      "  Consumer<String> c = System.out::println;\n"
+      "  Iface<Integer> mRef = Ty::<Integer>meth;\n"
+      "}",
+      format("private void foo() {\n"
+             "  f(this ::methodReference);\n"
+             "  f(C.super ::methodReference);\n"
+             "  Consumer<String> c = System.out ::println;\n"
+             "  Iface<Integer> mRef = Ty :: <Integer> meth;\n"
+             "}"));
+}
+
 TEST_F(FormatTestJava, CppKeywords) {
   verifyFormat("public void union(Type a, Type b);");
   verifyFormat("public void struct(Object o);");


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