option.h File Reference

Optional values. More...

#include <datatype99.h>
#include <metalang99.h>

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Macros
#define	COMPY_DEF_OPTION(...)   ML99_OVERLOAD(COMPY_PRIV_DEF_OPTION_, __VA_ARGS__)
	Defines a typed optional value.

Detailed Description

Optional values.

Macro Definition Documentation

COMPY_DEF_OPTION

#define COMPY_DEF_OPTION

(

...

)

ML99_OVERLOAD(COMPY_PRIV_DEF_OPTION_, __VA_ARGS__)

Defines a typed optional value.

• COMPY_DEF_OPTION(T) expands to datatype99(T##Option, (T##_Some, T), (T##_None)).
• COMPY_DEF_OPTION(name, T) expands to datatype99(name##Option, (name##_Some, T), (name##_None)).

See Datatype99 for the macro usage.