Initializing help system before first use

callfunc, callfunclsa

Purpose
Call a public function with the given name.
Synopsis
function callfunc(func:string|any, retval:any):reflecterror
function callfunc(func:string|any, retval:any, p1, p2...):reflecterror
function callfunclsa(func:string|any, retval:any, lsa:list):reflecterror
Arguments
func 
The name or a reference to the function to call
retval 
Union where the result of the function call is returned
pi 
Parameters of the function
lsa 
List of parameters of the function
Return value
The error status as a reflecterror
Example
The following Mosel code: 
public function product(i:integer,j:integer):integer
 returned:=i*j
end-function
declarations
 u:any
end-declarations

callfunc('product',u,4,4)
writeln("4*4=",u.integer)
produces this output: 
4*4=16
Further information
1. When used with a name, this routine selects the function to call based on the provided arguments without performing any conversion (for instance, using an integer where a real is expected will not work). The execution will terminate on a runtime error if no compatible function can be found.
2. The result of the function call is returned via the parameter retval that must be a union compatible with the type of the function. The execution will terminate on a runtime error if the result of the call cannot be saved in the provided entity.
3. The last version of the subroutine makes it possible to pass all the subroutine parameters via a single list.
4. The execution status of the function is notified via its return value. If this value is ignored ( i.e. the function is used as a procedure) the execution of the model will be interrupted in case of error ( e.g. routine not found or invalid number or type of parameters).
Related topics
callproc
Module
mmreflect

Parent Topic Procedures and functions

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