WSIZEOF | NOWSIZEOF
Category
Object code control
Pragma equivalent
Purpose
Causes the sizeof operator to return the widened size for function return types.
When the WSIZEOF compiler option is in effect, sizeof returns the size of the widened type for function return types instead of the size of the original return type.
When the NOWSIZEOF compiler option is in effect, sizeof returns the size of the original return type.
Defaults
NOWSIZEOF
Usage
When the sizeof operator was applied to a function return
type using the WSIZEOF compiler option, earlier C and C++ compilers
(prior to and including C/C++ for IBM® MVS™ Version 3 Release 1) returned
the size of the widened type instead of the original type. For example,
if the following code fragment, was compiled with an earlier compiler, i would
have a value of 4.
char foo();
i = sizeof foo();
Using the z/OS® XL C/C++ compiler, i has a value of 1, which is the size of the original type char.
The WSIZEOF compiler option toggles the behavior of the sizeof operator between that of the C and C++ compilers prior to and including C/C++ MVS Version 3 Release 1, and z/OS XL C/C++.
Predefined macros
None.