clang-format: Don't break lines starting with "import <string-literal>"

The author might be missing the "#" or these might be protocol buffer
definitions. Either way, we should not break the line or the string.

There don't seem to be other valid use cases.

llvm-svn: 199501

clang/lib/Format/TokenAnnotator.cpp

@@ -529,6 +529,15 @@ public:
       parsePreprocessorDirective();
       return LT_PreprocessorDirective;
     }
+  
+    // Directly allow to 'import <string-literal>' to support protocol buffer
+    // definitions (code.google.com/p/protobuf) or missing "#" (either way we
+    // should not break the line).
+    IdentifierInfo *Info = CurrentToken->Tok.getIdentifierInfo();
+    if (Info && Info->getPPKeywordID() == tok::pp_import &&
+        CurrentToken->Next && CurrentToken->Next->is(tok::string_literal))
+      parseIncludeDirective();
+
     while (CurrentToken != NULL) {
       if (CurrentToken->is(tok::kw_virtual))
         KeywordVirtualFound = true;

clang/unittests/Format/FormatTest.cpp

@@ -4657,6 +4657,10 @@ TEST_F(FormatTest, HandlesIncludeDirectives) {
   verifyFormat("#if __has_include(<strstream>)\n"
                "#include <strstream>\n"
                "#endif");
+
+  // Protocol buffer definition or missing "#".
+  verifyFormat("import \"aaaaaaaaaaaaaaaaa/aaaaaaaaaaaaaaa\";",
+               getLLVMStyleWithColumns(30));
 }
 
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