Initializing help system before first use

getsignature

Purpose
Retrieve the signature of a subroutine.
Synopsis
function getsignature(sbr:procedure|function):string
Argument
sbr 
A reference to a subroutine or a union containing a subroutine
Return value
The signature of the subroutine
Example 
public declarations
  f2: function(real, set of string):boolean
end-declarations

writeln("f takes ", getnbargs(->f2)," arguments, ",       ! = 2
  "f returns a boolean: ", getrettype(->f2)=boolean.id,   ! = true
  ", signature of f: ", getsignature(->f2))               ! = rEs
Further information
The signature of a subroutine is a text string characterising the types of the parameters it requires (but it does not provide information on the return type of a function). This string is empty for a subroutine not requiring any argument.
Related topics
getnbargs, getrettype.
Module
mmreflect

Parent Topic Procedures and functions

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