boostorg/preprocessor
1
0
Fork 1
mirror of https://github.com/boostorg/preprocessor.git synced 2025-07-12 20:16:36 +02:00
Code Issues Packages Projects Releases Wiki Activity
Files
0021c42186d334e4b046b2d8c7a45a454773f46c
preprocessor/example/delay.cpp
Vesa Karvonen 0021c42186 Minor technical detail added 
[SVN r12499]
2002-01-25 13:54:07 +00:00

86 lines
6.5 KiB
C++
Raw Blame History

// Copyright (C) 2001
// Housemarque Oy
// http://www.housemarque.com
//
// Permission to copy, use, modify, sell and distribute this software is
// granted provided this copyright notice appears in all copies. This
// software is provided "as is" without express or implied warranty, and
// with no claim as to its suitability for any purpose.
// See http://www.boost.org for most recent version.
#include <boost/preprocessor/while.hpp>
#include <boost/preprocessor/dec.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/empty.hpp>
// The time complexity of DELAY(N) is O(pow(2,N)).
//
// Handy when recompiles are too fast to take a coffee break. :)
//
// Template metaprogramming can be used for implementing similar
// delays. Unfortunately template instantiation consumes memory,
// therefore compilers usually fail to fully compile long template
// based delays, because they run out of memory. This macro takes
// only small (O(N)) amount of memory to preprocess.
#ifndef DELAY_MAX
#define DELAY_MAX 16
#endif
#define DELAY(N) BOOST_PP_IF(1,BOOST_PP_EMPTY,BOOST_PP_WHILE(DELAY_C,BOOST_PP_CAT(DELAY_F,N),BOOST_PP_DEC(N)))()
#define DELAY_C(D,N) N
#define DELAY_F0(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F1(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F2(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F3(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F4(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F5(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F6(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F7(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F8(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F9(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F10(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F11(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F12(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F13(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F14(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F15(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F16(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F17(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F18(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F19(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F20(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F21(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F22(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F23(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F24(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F25(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F26(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F27(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F28(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F29(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F30(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F31(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F32(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F33(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F34(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F35(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F36(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F37(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F38(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F39(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F40(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F41(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F42(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F43(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F44(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F45(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F46(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F47(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F48(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F49(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
#define DELAY_F50(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))
DELAY(DELAY_MAX)
Reference in New Issue View Git Blame Copy Permalink