Up

_envHasFun

Return few infos about a function, a global variable, a type or a constante in a channel environment.
It can be also called to return if it exists or not in a given channel.

Prototype :

fun [Chn S] [S S I S]

• Chn : any channel. If nil, the initial environment will be set. Else, associated environment with this channel will be set (= the initial environment + all packages and strings loaded in this channel).
• S : a function name (or a global variable name, a type name, ...).

Return : [S S I S] a tuple :

• S : the name (of the function, type, etc). By example "_openchannel".
• S : its type (nothing for a type). By example : "fun [S S Env] Chn".
• I : the arity (the number of arguments for a function) : negative for a type, a Scol constante or a global variable (in this last case : nil). By example : 3
• S : the package name where it defined (for the initial environment : "Initial environment")

See also :