This fixes a case where the column limit was incorrectly calculated
leading to a macro like this:

  #define A                                       \
    [] {                                          \
      xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(        \
          xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx); \
    }

exceeding the column limit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@238182 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@237114 91177308-0d34-0410-b5e6-96231b3b80d8

Before:
  #define MACRO()                     \
    Debug(aaa, /* force line break */ \
          {                           \
      int i;                          \
      int j;                          \
          })

After:
  #define MACRO()                     \
    Debug(aaa, /* force line break */ \
          {                           \
            int i;                    \
            int j;                    \
          })

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@237108 91177308-0d34-0410-b5e6-96231b3b80d8

Summary:
a) Pull out a class LevelIndentTracker whose responsibility is to keep track
   of the indent of levels across multiple annotated lines.
b) Put all responsibility for merging lines into the LineJoiner; make the
   LineJoiner iterate over the lines so we never operate on a line that might
   be merged later; this makes the interface safer to use.
c) Move formatting of the end-of-file whitespace into formatFirstToken.

Fix bugs that became obvious after the refactoring:
1. We would not format lines with offsets correctly inside nested blocks if
   only the outer expression was affected:
   int x = s({ // clang-format only this line
     class X {
       public:
    // ^ this starts at the non-modified indnent level; previously we would
    //   not fix this, now we correctly outdent it.
       void f();
     };
   });
2. We would incorrectly align comments across lines that do not have comments
   for lines with nested blocks:
   int expression; // with comment
   int x = s({
     int y; // comment
     int z; // we would incorrectly align this comment with the comment on
            // 'expression'
   });

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@237104 91177308-0d34-0410-b5e6-96231b3b80d8

Pull various parts of the UnwrappedLineFormatter into their own
abstractions. NFC.

There are two things left for subsequent changes (to keep this
reasonably small)
- the UnwrappedLineFormatter now has a bad name
- the UnwrappedLineFormatter::format function is still too large

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236974 91177308-0d34-0410-b5e6-96231b3b80d8

Implements a way to retrieve information about whether some lines were not formatted due to syntax errors.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236722 91177308-0d34-0410-b5e6-96231b3b80d8

Patch by Martin Probst.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236485 91177308-0d34-0410-b5e6-96231b3b80d8

Before (with the appropriate flags settings):
  if (a) {
    f();
  } else { g(); }

Before (with other appropriate flags settings):
  if (a) { f(); } else {
    g();
  }

After:
  if (a) {
    f();
  } else {
    g();
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236217 91177308-0d34-0410-b5e6-96231b3b80d8

Buggy case:
  someFunction(
      [] {
        // comment
        int i; // invoke formatting here.
      },       // force line break
      aaa);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236091 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235580 91177308-0d34-0410-b5e6-96231b3b80d8

Formatting:
  #define A { {
  #define B } }

Before:
  #define A               \
    {                     \
      { #define B }       \
    }

After:
  #define A               \
    {                     \
      {
  #define B               \
    }                     \
    }

This fixes llvm.org/PR22884.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232166 91177308-0d34-0410-b5e6-96231b3b80d8

I.e.:

  #define A public:

  // The new line before this line would be removed.
  int a;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@231636 91177308-0d34-0410-b5e6-96231b3b80d8

Before:

  @try {
    // ...
  }
  @finally {
    // ...
  }

Now:

  @try {
    // ...
  } @finally {
    // ...
  }

This is consistent with how we format C++ try blocks and SEH try blocks.
clang-format not doing this before was an implementation oversight.

This is dependent on BraceBreakingStyle.  The snippet above is with the
Attach style.  Style Stroustrip for example still results in the "Before:"
snippet, which makes sense since other blocks (try, else) break after '}' too.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228483 91177308-0d34-0410-b5e6-96231b3b80d8

This lets clang-format format

    __try {
    } __except(0) {
    }

and

    __try {
    } __finally {
    }

correctly. __try and __finally are keywords if `LangOpts.MicrosoftExt` is set,
so this turns this on.  This also enables a few other keywords, but it
shouldn't overly perturb regular clang-format operation.  __except is a
context-sensitive keyword, so `AdditionalKeywords` needs to be passed around to
a few more places.

Fixes PR22321.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228148 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@227427 91177308-0d34-0410-b5e6-96231b3b80d8

We did't properly mark all of an AnnotatedLine's children as finalized
and thus would reformat the same tokens in different branches of #if/#else
sequences leading to invalid replacements.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226930 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224430 91177308-0d34-0410-b5e6-96231b3b80d8

This fixed llvm.org/PR21804 and hopefully a few other strange cases.

Before:
    if (blah_blah(whatever, whatever, [] {
      doo_dah();
      doo_dah();
    })) {
    }
    }

After:
    if (blah_blah(whatever, whatever, [] {
          doo_dah();
          doo_dah();
        })) {
    }
    }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224112 91177308-0d34-0410-b5e6-96231b3b80d8

No functional changes intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223936 91177308-0d34-0410-b5e6-96231b3b80d8