Formatter: parse and format inline namespaces like regular namespaces

This changes formatting from:

inline namespace X {
  class A {
  };
}

to:

inline namespace X {
class A {
};
}

llvm-svn: 171266

clang/lib/Format/UnwrappedLineParser.cpp

@@ -100,10 +100,19 @@ void UnwrappedLineParser::parseComments() {
 void UnwrappedLineParser::parseStatement() {
   parseComments();
 
+  int TokenNumber = 0;
   switch (FormatTok.Tok.getKind()) {
   case tok::kw_namespace:
     parseNamespace();
     return;
+  case tok::kw_inline:
+    nextToken();
+    TokenNumber++;
+    if (FormatTok.Tok.is(tok::kw_namespace)) {
+      parseNamespace();
+      return;
+    }
+    break;
   case tok::kw_public:
   case tok::kw_protected:
   case tok::kw_private:
@@ -132,7 +141,6 @@ void UnwrappedLineParser::parseStatement() {
   default:
     break;
   }
-  int TokenNumber = 0;
   do {
     ++TokenNumber;
     switch (FormatTok.Tok.getKind()) {

clang/unittests/Format/FormatTest.cpp

@@ -349,6 +349,13 @@ TEST_F(FormatTest, FormatsNamespaces) {
                "  f();\n"
                "}\n"
                "}");
+  verifyFormat("inline namespace X {\n"
+               "class A {\n"
+               "};\n"
+               "void f() {\n"
+               "  f();\n"
+               "}\n"
+               "}");
   verifyFormat("using namespace some_namespace;\n"
                "class A {\n"
                "};\n"