owenpan added inline comments.

================
Comment at: clang/lib/Format/FormatTokenLexer.cpp:433-446
   bool FourthTokenIsLess = false;
-  if (Tokens.size() > 3)
-    FourthTokenIsLess = (Tokens.end() - 4)[0]->is(tok::less);
 
-  auto First = Tokens.end() - 3;
+  if (Tokens.size() > 3) {
+    auto Fourth = (Tokens.end() - 4)[0];
+    FourthTokenIsLess = Fourth->is(tok::less);
+
+    // Do not remove a whitespace between the two "<" e.g. "operator< <>".
----------------
curdeius wrote:
> I hate the naming here.
> Unless I'm mistaken we have: Fourth, First + 0, First + 1, First + 2.
> But I'll clean it up at some time.
Me too. Maybe changing `First` to point at `Fourth` and get rid of `Fourth`, 
which has a different level of indirection than `First` now. I would probably 
get rid of `FourthTokenIsLess` as well.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117398/new/

https://reviews.llvm.org/D117398

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