https://llvm.org/bugs/show_bug.cgi?id=30924

            Bug ID: 30924
           Summary: output when breaking comments is not stable
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangb...@nondot.org
          Reporter: lec...@gmail.com
                CC: djas...@google.com, kli...@google.com,
                    llvm-bugs@lists.llvm.org
    Classification: Unclassified

I'm using the llvm style and clang-format-4.0

The code i'm using for this test is the following :


struct foo {
  int32_t foo; ///< awesome member documentation
  int32_t bar; ///< Some really long comment for doxygen that I still want
after the member to keep my codebase coherent. make it loooooong
  int32_t foobar; ///< Antoher member
};

After the first run :

struct foo {
  int32_t foo;    ///< awesome member documentation
  int32_t bar;    ///< Some really long comment for doxygen that I still want
after the member to keep my codebase
                  ///coherent. make it loooooong
  int32_t foobar; ///< Antoher member
};

After the second run :

struct foo {
  int32_t foo;    ///< awesome member documentation
  int32_t bar;    ///< Some really long comment for doxygen that I still want
after the member to keep my codebase
                  /// coherent. make it loooooong
  int32_t foobar; ///< Antoher member
};

You can notice the "///coherent" became "/// coherent"



------


Another (similar) issue with this when it breaks on more than once :


original code :


struct foo {
    int32_t foo; ///< awesome member documentation
    int32_t bar; ///< Some really long comment for doxygen that I still want
after the member to keep my codebase coherent. make it
looooooooooooooooooooooooo oooooooooooooooooooooooo ooooooooooooooooooooo
oooooooooong
    int32_t foobar; ///< Antoher member
};

After the first run :

struct foo
{
    int32_t foo;    ///< awesome member documentation
    int32_t bar;    ///< Some really long comment for doxygen that I still want
after the member to
                    ///keep my codebase coherent. make it
looooooooooooooooooooooooo
                    ///oooooooooooooooooooooooo ooooooooooooooooooooo
oooooooooong
    int32_t foobar; ///< Antoher member
};

After the second run :

struct foo
{
    int32_t foo; ///< awesome member documentation
    int32_t bar; ///< Some really long comment for doxygen that I still want
after the member to
                 /// keep my codebase coherent. make it
looooooooooooooooooooooooo
    /// oooooooooooooooooooooooo ooooooooooooooooooooo oooooooooong
    int32_t foobar; ///< Antoher member
};

As you can see the 3rd line of comment is not aligned with the previous ones

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