[clang-format] Bug when formatting a macro

[prj-]

$  clang-format --version
clang-format version 17.0.6
$ cat simple.cpp
#ifndef PLEXFE_QFUNCTION
  #define PLEXFE_QFUNCTION(fname, f0_name, f1_name) \
    CEED_QFUNCTION(PlexQFunction##fname)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) \
    { \
        const CeedScalar invJ[2][2]    = { \
          {qdata[i+Q*3], qdata[i+Q*5]}, \
          {qdata[i+Q*4], qdata[i+Q*6]} \
        }; \
      return CEED_ERROR_SUCCESS; \
    }
#endif

PLEXFE_QFUNCTION(A, B, C)
$ clang-format --style=file:clang-format.txt simple.cpp 
#ifndef PLEXFE_QFUNCTION
  #define PLEXFE_QFUNCTION(fname, f0_name, f1_name) \
    CEED_QFUNCTION(PlexQFunction##fname)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) \
    { \
      const CeedScalar invJ[2][2] = { \
        {qdata[i + Q * 3], qdata[i + Q * 5]},
        {qdata[i + Q * 4], qdata[i + Q * 6]}
      }; \
      return CEED_ERROR_SUCCESS; \
    }
#endif

PLEXFE_QFUNCTION(A, B, C)

Also triggered by Debian clang-format version 18.0.0 (++20240102111311+9b7cf5bfb08b-1~exp1~20240102111413.1794).
clang-format.txt

[prj-]

Is there something I could do to help get this bug fixed?

[prj-]

@owenca, any update on this?

[owenca]

Is there something I could do to help get this bug fixed?

A minimum reproducer would help. :)

[owenca]

Here's one:

$ cat test.cpp
#define FOO \
  int foo[][2] = { \
    {0, 1} \
  };
$ clang-format -version
clang-format version 17.0.6
$ clang-format -style='{AlignArrayOfStructures: Left, AlignEscapedNewlines: DontAlign}' test.cpp
#define FOO \
  int foo[][2] = { \
      {0, 1}
  };
$ 

[prj-]

Thank you very much.

[frank101010]

I've found out that this bug can be worked around by adding a trailing comma to the last element in the list, i.e. formatting

#define FOO \
  int foo[][2] = { \
      {0, 1}, \
  };

should work fine.