-  ←Prev 
- AST
 A Library for Handling
 World Coordinate Systems
 in Astronomy
- Next→ 
- TOC ↑
    
Description: 
 This is a family
of functions which test whether an 
Object is a member of the class called
Class,
or of any class derived from it.  
Synopsis 
 int
astIsAClass(
const AstClass
this
)  
 Parameters: 
  this  
 Pointer to the Object.  
    Applicability 
 
Object  
 These functions apply to all Objects.  
    Returned Value 
 
astIsAClass()
 One if the Object belongs to the class called
Class
(or to a class derived from it), otherwise zero.  
    Examples: 
  member = astIsAFrame(
obj );  
Tests whether Object" obj" is a member of the Frame class, or of any class
derived from a Frame.      Notes: 
 
- 
Every AST class provides a function
(astIsAClass)
of this form, where Class
should be replaced by the class name.
 
- 
This function attempts to execute even if the AST error status is set on entry,
although no further error report will be made if it subsequently fails under these
circumstances.
 
- 
A value of zero will be returned if this function should fail for any reason. In
particular, it will fail if the pointer supplied does not identify an Object of any
sort.   
  Copyright (C) 2021 East Asian Observatory
  -  ←Prev 
- AST
 A Library for Handling
 World
Coordinate Systems
 in Astronomy
- Next→ 
- TOC ↑