blob: 03b5fe314d92980801448c02785ac348ba7628db [file] [log] [blame]
* rw_sigdefs.h - definitions of helpers macros to define member and
* non-member functions overload id's
* $Id$
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* implied. See the License for the specific language governing
* permissions and limitations under the License.
// FCAT() concatenates prefix, underscrore, and suffix
#define _FCAT(a, b) a ## b
#define FCAT(a, b) _FCAT (a ## _, b)
// FID_N() constructs the name for an overload of a container function
#define FID_0(f) FCAT (f, void)
#define FID_1(f, a) FCAT (f, a)
#define FID_2(f, a, b) FID_1 (FCAT (f, a), b)
#define FID_3(f, a, b, c) FID_2 (FCAT (f, a), b, c)
#define FID_4(f, a, b, c, d) FID_3 (FCAT (f, a), b, c, d)
#define FID_5(f, a, b, c, d, e) FID_4 (FCAT (f, a), b, c, d, e)
// ARG() creates a bitmap of an argument type at the given position
#define ARG(a, N) ((arg_ ## a << (N * arg_bits)) << fid_bits)
// SIG_N() creates an argument bitmap for the given function signature
#define SIG_0(f) fid_ ## f
#define SIG_1(f, a) SIG_0 (f) | ARG (a, 0)
#define SIG_2(f, a, b) SIG_1 (f, a) | ARG (b, 1)
#define SIG_3(f, a, b, c) SIG_2 (f, a, b) | ARG (c, 2)
#define SIG_4(f, a, b, c, d) SIG_3 (f, a, b, c) | ARG (d, 3)
#define SIG_5(f, a, b, c, d, e) SIG_4 (f, a, b, c, d) | ARG (e, 4)
#define SIG_6(f, a, b, c, d, e, g) SIG_5 (f, a, b, c, d, e) | ARG (g, 5)
// convenience macro to define member function overload id's
// where the first argument encodes the constness of the member
// function (or the lack thereof)
#define MEMBER_0(f, self) \
FID_0 (f) = SIG_1 (f, self) | bit_member
#define MEMBER_1(f, self, a) \
FID_1 (f, a) = SIG_2 (f, self, a) | bit_member
#define MEMBER_2(f, self, a, b) \
FID_2 (f, a, b) = SIG_3 (f, self, a, b) | bit_member
#define MEMBER_3(f, self, a, b, c) \
FID_3 (f, a, b, c) = SIG_4 (f, self, a, b, c) | bit_member
#define MEMBER_4(f, self, a, b, c, d) \
FID_4 (f, a, b, c, d) = SIG_5 (f, self, a, b, c, d) | bit_member
#define MEMBER_5(f, self, a, b, c, d, e) \
FID_5 (f, a, b, c, d, e) = SIG_6 (f, self, a, b, c, d, e) | bit_member
// convenience macro to define non-member function overload id's
#define NON_MEMBER_0(f) \
FID_0 (f) = SIG_0 (f)
#define NON_MEMBER_1(f, a) \
FID_1 (f, a) = SIG_1 (f, a)
#define NON_MEMBER_2(f, a, b) \
FID_2 (f, a, b) = SIG_2 (f, a, b)
#define NON_MEMBER_3(f, a, b, c) \
FID_3 (f, a, b, c) = SIG_3 (f, a, b, c)
#define NON_MEMBER_4(f, a, b, c, d) \
FID_4 (f, a, b, c, d) = SIG_4 (f, a, b, c, d)
#define NON_MEMBER_5(f, a, b, c, d, e) \
FID_5 (f, a, b, c, d, e) = SIG_5 (f, a, b, c, d, e)
#else // #ifdef RW_SIGDEFS_H_INCLUDED
// clean up helper macros used above
#undef _FCAT
#undef FCAT
#undef FID_0
#undef FID_1
#undef FID_2
#undef FID_3
#undef FID_4
#undef FID_5
#undef ARG
#undef SIG_0
#undef SIG_1
#undef SIG_2
#undef SIG_3
#undef SIG_4
#undef SIG_5
#undef MEMBER_0
#undef MEMBER_1
#undef MEMBER_2
#undef MEMBER_3
#undef MEMBER_4
#undef MEMBER_5