Name

cgGetNumParentTypes - gets the number of parent types of a given type

Synopsis

#include <Cg/cg.h>

int cgGetNumParentTypes( CGtype type );

Parameters

type

The child type.

Return Values

Returns the number of parent types.

Returns 0 if there are no parents.

Description

cgGetNumParentTypes returns the number of parents from which type inherits.

A parent type is one from which the given type inherits, or an interface type that the given type implements.

Note that the current Cg language specification implies that a type may only have a single parent type -- an interface implemented by the given type.

Examples

Given the type definitions:

interface myiface {
  float4 eval(void);
};

struct mystruct : myiface {
  float4 value;
  float4 eval(void ) { return value; }
};

mystruct has a single parent type, myiface.

Errors

None.

History

cgGetNumParentTypes was introduced in Cg 1.2.

See Also

cgGetParentType