Fix clang-format's expression parser for leading }s.

The leading "}" in the construct "} else if (..) {" was confusing the
expression parser. Thus, no fake parentheses were generated and the
indentation was broken in some cases.

llvm-svn: 183393

clang/lib/Format/TokenAnnotator.cpp

@@ -773,7 +773,11 @@ private:
 /// operator precedence.
 class ExpressionParser {
 public:
-  ExpressionParser(AnnotatedLine &Line) : Current(Line.First) {}
+  ExpressionParser(AnnotatedLine &Line) : Current(Line.First) {
+    // Skip leading "}", e.g. in "} else if (...) {".
+    if (Current->is(tok::r_brace))
+      next();
+  }
 
   /// \brief Parse expressions with the given operatore precedence.
   void parse(int Precedence = 0) {

clang/unittests/Format/FormatTest.cpp

@@ -2073,6 +2073,10 @@ TEST_F(FormatTest, ExpressionIndentation) {
                "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
                "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
                "        bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}");
+  verifyFormat("if () {\n"
+               "} else if (aaaaa && bbbbb > // break\n"
+               "                        ccccc) {\n"
+               "}");
 }
 
 TEST_F(FormatTest, ConstructorInitializers) {