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The
Microsoft-specific
__noop
intrinsic specifies that a function should be ignored. The argument list is parsed, but no code is generated for the arguments. The compiler considers the arguments as referenced for the purposes of compiler warning C4100 and similar analysis. The
__noop
intrinsic is intended for use in global debug functions that take a variable number of arguments.
The compiler converts the
__noop
intrinsic to 0 at compile time.
Example
The following code shows how you could use
__noop
.
// compiler_intrinsics__noop.cpp
// compile using: cl /EHsc /W4 compiler_intrinsics__noop.cpp
// compile with or without /DDEBUG
#include <stdio.h>
#if DEBUG
#define PRINT printf_s
#else
#define PRINT __noop
#endif
#define IGNORE(x) { __noop(x); }
int main(int argv, char ** argc)
IGNORE(argv);
IGNORE(argc);
PRINT("\nDEBUG is defined\n");
See also
Compiler intrinsics
Keywords
