isdefined
Purpose
Check whether the provided entity is defined.
Synopsis
int isdefined(XPRMcontext ctx, int type, void *ref);
Arguments
|
ctx
|
Mosel's execution context
|
|
type
|
Type or structure of the provided reference
|
|
ref
|
A reference to an entity of the specified type
|
Return value
-1 if the type code is not valid,
1 if the entity is
defined, or
0 otherwise.
Further information
1. The parameter
type can be either a type number or a structure code (
e.g.
XPRM_STR_UNION).
2. In the case of a reference to a subroutine or a union this function will succeed if the reference is not
NULL and the container has received a value. For other types it will return 0 if
ref is
NULL and
1 otherwise.
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