Fix clang-format's detection of structured bindings.

Correctly determine when [ is part of a structured binding instead of a
lambda.

To be able to reuse the implementation already available, this patch also:
- sets the Previous link of FormatTokens in the UnwrappedLineParser
- moves the isCppStructuredBinding function into FormatToken

Before:
  auto const const &&[x, y] { A *i };

After:
  auto const const && [x, y]{A * i};

Fixing formatting of the type of the structured binding is still missing.

llvm-svn: 313742

1 files changed, 0 insertions, 1 deletions

diff --git a/clang/lib/Format/UnwrappedLineParser.h b/clang/lib/Format/UnwrappedLineParser.h
index 93b3bfafbad..a4b5576f92d 100644
--- a/clang/lib/Format/UnwrappedLineParser.h
+++ b/clang/lib/Format/UnwrappedLineParser.h
@@ -129,7 +129,6 @@ private:
   // - if the token is '}' and closes a block, LevelDifference is -1.
   void nextToken(int LevelDifference = 0);
   void readToken(int LevelDifference = 0);
-  const FormatToken *getPreviousToken();
 
   // Decides which comment tokens should be added to the current line and which
   // should be added as comments before the next token.