File: diff.lang.texinfo

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@c Generator: GNU source-highlight, by Lorenzo Bettini, http://www.gnu.org/software/src-highlite
@example
@r{@i{# language definition for files created with 'diff'}}

@r{@i{# diff created with -u option}}
@b{state} @t{@i{oldfile}} = @t{'(?=^[-]@{3@})'} @b{begin}
  @t{@i{oldfile}} @b{start} @t{'^[-]@{3@}'}
  @t{@i{oldfile}} @b{start} @t{'^[-]'}
  @t{@i{newfile}} @b{start} @t{'^[+]'}
  @t{@i{difflines}} @b{start} @t{'^@@@@'}
@b{end}

@r{@i{# diff created with -c option}}
@b{state} @t{@i{oldfile}} = @t{'(?=^[*]@{3@})'} @b{begin}
  @b{environment} @t{@i{oldfile}} = @t{'^[*]@{3@}[[:blank:]]+[[:digit:]]'} @b{begin}
    @t{@i{normal}} @b{start} @t{'^[[:space:]]'}
    @t{@i{newfile}} = @t{'(?=^[-]@{3@})'} @b{exit}
  @b{end}
  @t{@i{oldfile}} @b{start} @t{'^[*]@{3@}'}

  @b{environment} @t{@i{newfile}} = @t{'^[-]@{3@}[[:blank:]]+[[:digit:]]'} @b{begin}
    @t{@i{normal}} @b{start} @t{'^[[:space:]]'}
    @t{@i{newfile}} = @t{'(?=^[*]@{3@})'} @b{exit}
    @t{@i{normal}} @b{start} @t{'^diff'} @b{exit}
  @b{end}
  @t{@i{newfile}} @b{start} @t{'^[-]@{3@}'}
@b{end}

@r{@i{# otherwise, created without options}}
@b{state} @t{@i{difflines}} = @t{'(?=^[[:digit:]])'} @b{begin}
  @t{@i{difflines}} @b{start} @t{'^[[:digit:]]'}
  @t{@i{oldfile}} @b{start} @t{'^[<]'}
  @t{@i{newfile}} @b{start} @t{'^[>]'}
@b{end}

@end example