Preprocessor.h File Reference

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Macros
#define	OPEN3D_FIX_MSVC_(...)
#define	OPEN3D_CONCAT_IMPL_(s1, s2)
#define	OPEN3D_CONCAT(s1, s2)
#define	OPEN3D_STRINGIFY_IMPL_(s)
#define	OPEN3D_STRINGIFY(s)
#define	OPEN3D_GET_NTH_ARG_(...)
#define	OPEN3D_GET_NTH_ARG_IMPL_(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, N, ...)
#define	OPEN3D_REVERSE_NUM_SEQUENCE_()
#define	OPEN3D_NUM_ARGS(...)
#define	OPEN3D_OVERLOAD(func, ...)

Macro Definition Documentation

OPEN3D_CONCAT

#define OPEN3D_CONCAT	(		s1,
			s2 )

Value:

OPEN3D_CONCAT_IMPL_(s1, s2)

OPEN3D_CONCAT_IMPL_

#define OPEN3D_CONCAT_IMPL_	(		s1,
			s2 )

Value:

s1##s2

OPEN3D_CONCAT(s1, s2)

Concatenates the expanded expressions s1 and s2.

OPEN3D_FIX_MSVC_

#define OPEN3D_FIX_MSVC_

(

...

)

Value:

__VA_ARGS__

OPEN3D_FIX_MSVC_(...)

Internal helper function which defers the evaluation of the enclosed expression.

Use this macro only to workaround non-compliant behaviour of the MSVC preprocessor.

Note: Could be dropped in the future if the compile flag /Zc:preprocessor can be applied.

OPEN3D_GET_NTH_ARG_

#define OPEN3D_GET_NTH_ARG_

(

...

)

Value:

    OPEN3D_FIX_MSVC_(OPEN3D_GET_NTH_ARG_IMPL_(__VA_ARGS__))

OPEN3D_NUM_ARGS(...)

Returns the number of supplied arguments.

Note: Only works for 1-10 arguments.

OPEN3D_GET_NTH_ARG_IMPL_

#define OPEN3D_GET_NTH_ARG_IMPL_	(		arg1,
			arg2,
			arg3,
			arg4,
			arg5,
			arg6,
			arg7,
			arg8,
			arg9,
			arg10,
			N,
			... )

Value:

    N

OPEN3D_NUM_ARGS

#define OPEN3D_NUM_ARGS

(

...

)

Value:

    OPEN3D_GET_NTH_ARG_(__VA_ARGS__, OPEN3D_REVERSE_NUM_SEQUENCE_())

OPEN3D_OVERLOAD

#define OPEN3D_OVERLOAD	(		func,
			... )

Value:

    OPEN3D_CONCAT(func, OPEN3D_NUM_ARGS(__VA_ARGS__))

OPEN3D_OVERLOAD(func, ...)

Overloads the enumerated macros func1, func2, etc. based on the number of additional arguments.

Example:

#define FOO_1(x1) foo(x1)
#define FOO_2(x1, x2) bar(x1, x2)
#define FOO(...) '\'
    OPEN3D_FIX_MSVC_(OPEN3D_OVERLOAD(FOO_, __VA_ARGS__)(__VA_ARGS__))
 
FOO(1)    -> foo(1)
FOO(2, 3) -> bar(2, 3)

OPEN3D_REVERSE_NUM_SEQUENCE_

#define OPEN3D_REVERSE_NUM_SEQUENCE_

(

)

Value:

10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

OPEN3D_STRINGIFY

#define OPEN3D_STRINGIFY

(

s

)

Value:

OPEN3D_STRINGIFY_IMPL_(s)

OPEN3D_STRINGIFY_IMPL_

#define OPEN3D_STRINGIFY_IMPL_

(

s

)

Value:

#s

OPEN3D_STRINGIFY(s)

Converts the expanded expression s to a string.