clang-format: [Java/JS] Properly support instanceof and its precedence.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241337 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/TokenAnnotator.cpp

@@ -1008,7 +1008,7 @@ private:
     if (Tok.isNot(tok::identifier) || !Tok.Previous)
       return false;
 
-    if (Tok.Previous->is(TT_LeadingJavaAnnotation))
+    if (Tok.Previous->isOneOf(TT_LeadingJavaAnnotation, Keywords.kw_instanceof))
       return false;
 
     // Skip "const" as it does not have an influence on whether this is a name.
@@ -1336,6 +1336,10 @@ private:
         return 0;
       if (Current->is(TT_RangeBasedForLoopColon))
         return prec::Comma;
+      if ((Style.Language == FormatStyle::LK_Java ||
+           Style.Language == FormatStyle::LK_JavaScript) &&
+          Current->is(Keywords.kw_instanceof))
+        return prec::Relational;
       if (Current->is(TT_BinaryOperator) || Current->is(tok::comma))
         return Current->getPrecedence();
       if (Current->isOneOf(tok::period, tok::arrow))
@@ -2238,7 +2242,8 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
     return true;
   if (Right.is(tok::kw_typename) && Left.isNot(tok::kw_const))
     return true;
-  if (Left.isBinaryOperator() && !Left.isOneOf(tok::arrowstar, tok::lessless) &&
+  if ((Left.isBinaryOperator() || Left.is(TT_BinaryOperator)) &&
+      !Left.isOneOf(tok::arrowstar, tok::lessless) &&
       Style.BreakBeforeBinaryOperators != FormatStyle::BOS_All &&
       (Style.BreakBeforeBinaryOperators == FormatStyle::BOS_None ||
        Left.getPrecedence() == prec::Assignment))

unittests/Format/FormatTestJava.cpp

@@ -67,6 +67,8 @@ TEST_F(FormatTestJava, FormatsInstanceOfLikeOperators) {
   verifyFormat("return aaaaaaaaaaaaaaaaaaaaaaaaaaaaa instanceof\n"
                "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;",
                Style);
+  verifyFormat("return aaaaaaaaaaaaaaaaaaa instanceof bbbbbbbbbbbbbbbbbbbbbbb\n"
+               "    && ccccccccccccccccccc instanceof dddddddddddddddddddddd;");
 }
 
 TEST_F(FormatTestJava, Chromium) {