1.5 Designator classes
size-of
Function
Summary
Takes a designator class and returns the size of the C type that the class designates.
Signature
size-of designator-class => size
Arguments
- designator-class
- A subclass of
<C-value>.
Values
- size
- An instance of
<integer>.
Library
c-ffi
Module
c-ffi
Description
Takes a designator class and returns the size of the C type that the class designates.
The size-of function can be applied to any designator class. However, if it is applied to <C-void>, <C-value>, or <C-struct>, it returns zero. It corresponds to C's sizeof operator and returns an integer, size, in the same units as sizeof does on the target platform. It can be useful when allocating a C object whose declared size is not accurate and has to be adjusted manually.