Open3D (C++ API)  0.18.0+5c982c7
Macros
Preprocessor.h File Reference

(5c982c7 (Thu Apr 18 12:15:13 2024 -0700))

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Macros

#define OPEN3D_FIX_MSVC_(...)   __VA_ARGS__
 
#define OPEN3D_CONCAT_IMPL_(s1, s2)   s1##s2
 
#define OPEN3D_CONCAT(s1, s2)   OPEN3D_CONCAT_IMPL_(s1, s2)
 
#define OPEN3D_STRINGIFY_IMPL_(s)   #s
 
#define OPEN3D_STRINGIFY(s)   OPEN3D_STRINGIFY_IMPL_(s)
 
#define OPEN3D_GET_NTH_ARG_(...)    OPEN3D_FIX_MSVC_(OPEN3D_GET_NTH_ARG_IMPL_(__VA_ARGS__))
 
#define OPEN3D_GET_NTH_ARG_IMPL_(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, N, ...)    N
 
#define OPEN3D_REVERSE_NUM_SEQUENCE_()   10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
 
#define OPEN3D_NUM_ARGS(...)    OPEN3D_GET_NTH_ARG_(__VA_ARGS__, OPEN3D_REVERSE_NUM_SEQUENCE_())
 
#define OPEN3D_OVERLOAD(func, ...)    OPEN3D_CONCAT(func, OPEN3D_NUM_ARGS(__VA_ARGS__))
 

Macro Definition Documentation

◆ OPEN3D_CONCAT

#define OPEN3D_CONCAT (   s1,
  s2 
)    OPEN3D_CONCAT_IMPL_(s1, s2)

◆ OPEN3D_CONCAT_IMPL_

#define OPEN3D_CONCAT_IMPL_ (   s1,
  s2 
)    s1##s2

OPEN3D_CONCAT(s1, s2)

Concatenates the expanded expressions s1 and s2.

◆ OPEN3D_FIX_MSVC_

#define OPEN3D_FIX_MSVC_ (   ...)    __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_ (   ...)     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,
  ... 
)     N

◆ OPEN3D_NUM_ARGS

#define OPEN3D_NUM_ARGS (   ...)     OPEN3D_GET_NTH_ARG_(__VA_ARGS__, OPEN3D_REVERSE_NUM_SEQUENCE_())

◆ OPEN3D_OVERLOAD

#define OPEN3D_OVERLOAD (   func,
  ... 
)     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)
#define OPEN3D_FIX_MSVC_(...)
Definition: Preprocessor.h:20
#define OPEN3D_OVERLOAD(func,...)
Definition: Preprocessor.h:64

◆ OPEN3D_REVERSE_NUM_SEQUENCE_

#define OPEN3D_REVERSE_NUM_SEQUENCE_ ( )    10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

◆ OPEN3D_STRINGIFY

#define OPEN3D_STRINGIFY (   s)    OPEN3D_STRINGIFY_IMPL_(s)

◆ OPEN3D_STRINGIFY_IMPL_

#define OPEN3D_STRINGIFY_IMPL_ (   s)    #s

OPEN3D_STRINGIFY(s)

Converts the expanded expression s to a string.