Other macros
These macros are supported by XL C/C++. They do not have predefined values.
| Macro name | Description | Example |
|---|---|---|
| __has_include | Checks for the existence of a given include
file. You must use this macro as expressions in #if or #elif preprocessing directives. The macro evaluates to 1 if the given include file is found in the include paths; otherwise, it evaluates to 0. |
__has_include("include_file_name.h") __has_include(<include_file_name.h>) |
| __has_include_next | Checks for a second instance of a given include
file. You must use this macro as expressions in #if or #elif preprocessing directives. You can use this macro only in headers. If the macro is used in the top-level compilation file, the compiler will issue a warning message. The compiler will also issue a warning message if an absolute path is used in the file argument. The macro evaluates to 1 if a second instance of the given include file is found in the include paths; otherwise, it evaluates to 0. |
__has_include_next("include_file_name.h") __has_include_next(<include_file_name.h>) |
