3.1.4 Where to place directives for GNU indent.

If you want to invoke GNU indent on a gperf input file, you will see that GNU indent doesn't understand the ‘%%’, ‘%{’ and ‘%}’ directives that control gperf's interpretation of the input file. Therefore you have to insert some directives for GNU indent. More precisely, assuming the most general input file structure

     declarations part 1
     %{
     verbatim code
     %}
     declarations part 2
     %%
     keywords
     %%
     functions

you would insert ‘*INDENT-OFF*’ and ‘*INDENT-ON*’ comments as follows:

     /* *INDENT-OFF* */
     declarations part 1
     %{
     /* *INDENT-ON* */
     verbatim code
     /* *INDENT-OFF* */
     %}
     declarations part 2
     %%
     keywords
     %%
     /* *INDENT-ON* */
     functions