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3.5.6 ‘format-arg-count’ - count the args to a format

Usage: (format-arg-count format)
Sometimes, it is useful to simply be able to figure out how many arguments are required by a format string. For example, if you are extracting a format string for the purpose of generating a macro to invoke a printf-like function, you can run the formatting string through this function to determine how many arguments to provide for in the macro. e.g. for this extraction text:

 /*=fumble bumble
  * fmt: 'stumble %s: %d\n'

You may wish to generate a macro:

 #define BUMBLE(a1,a2) printf_like(something,(a1),(a2))

You can do this by knowing that the format needs two arguments.

format - formatting string

This document was generated by Bruce Korb on August 21, 2015 using texi2html 1.82.