diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 55 |
1 files changed, 55 insertions, 0 deletions
@@ -17321,6 +17321,61 @@ function The environment object holds the captured bindings of a lexical closure. +.coNP Functions @ fun-fixparam-count and @ fun-optparam-count +.synb +.mets (fun-fixparam-count << func ) +.mets (fun-optparam-count << func ) +.syne +.desc +The +.code fun-fixparam-count +reports +.metn func 's +number of fixed parameters. The fixed parameters consist of the required +parameters and the optional parameters. Variadic functions have a parameter +which captures the remaining arguments which are in excess of the fixed +parameters. That parameter is not considered a fixed parameter and therefore +doesn't contribute to this count. + +The +.code fun-optparam-count +reports +.metn func 's +number of optional parameters. + +The +.meta func +argument must be a function. + +Note: if a function isn't variadic (see the +.meta fun-variadic +function) then the value reported by +.code fun-fixparam-count +represents the maximum number of arguments which can be passed to the function. +The minimum number of required arguments can be calculated for any function by +subtracting the value from +.code fun-optparam-count +from the value from +.codn fun-fixparam-count . + +.coNP Function @ fun-variadic +.synb +.mets (fun-variadic << func ) +.syne +.desc +The +.code fun-variadic +function returns +.code t +if +.meta func +is a variadic function, otherwise +.codn nil . + +The +.meta func +argument must be a function. + .coNP Function @ interp-fun-p .synb .mets (interp-fun-p << obj ) |