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source: downloads/boost_1_34_1/libs/preprocessor/doc/examples/delay.c @ 69

Last change on this file since 69 was 29, checked in by landauf, 17 years ago

updated boost from 1_33_1 to 1_34_1
File size: 7.3 KB
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1# /* Copyright (C) 2002
2#  * Housemarque Oy
3#  * http://www.housemarque.com
4#  *
5#  * Distributed under the Boost Software License, Version 1.0. (See
6#  * accompanying file LICENSE_1_0.txt or copy at
7#  * http://www.boost.org/LICENSE_1_0.txt)
8#  */
9#
10# /* Revised by Paul Mensonides (2002) */
11#
12# /* See http://www.boost.org for most recent version. */
13#
14# /* The time complexity of DELAY(N) is O(2^N).
15#  *
16#  * Handy when recompiles are too fast to take a coffee break. :)
17#  *
18#  * Template metaprogramming can be used for implementing similar
19#  * delays. Unfortunately template instantiation consumes memory,
20#  * therefore compilers usually fail to fully compile long template
21#  * based delays, because they run out of memory.
22#  *
23#  * On many compilers (e.g. g++, MSVC++), this macro takes only a
24#  * small amount of memory to preprocess. On some compilers (e.g.
25#  * MWCW), however, this macro seems to consume huge amounts of
26#  * memory.
27#  */
28#
29# include <boost/preprocessor/arithmetic/dec.hpp>
30# include <boost/preprocessor/cat.hpp>
31# include <boost/preprocessor/control/while.hpp>
32# include <boost/preprocessor/facilities/empty.hpp>
33# include <boost/preprocessor/tuple/elem.hpp>
34#
35# ifndef DELAY_MAX
36# define DELAY_MAX 14
37# endif
38#
39# define DELAY(N) BOOST_PP_TUPLE_ELEM(2, 0, (BOOST_PP_EMPTY, BOOST_PP_WHILE(DELAY_C, BOOST_PP_CAT(DELAY_F, N), BOOST_PP_DEC(N))))()
40#
41# define DELAY_C(D, N) N
42#
43# 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)))
44# 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)))
45# 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)))
46# 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)))
47# 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)))
48# 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)))
49# 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)))
50# 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)))
51# 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)))
52# 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)))
53# 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)))
54# 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)))
55# 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)))
56# 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)))
57# 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)))
58# 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)))
59# 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)))
60# 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)))
61# 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)))
62# 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)))
63# 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)))
64# 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)))
65# 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)))
66# 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)))
67# 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)))
68# 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)))
69# 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)))
70# 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)))
71# 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)))
72# 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)))
73# 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)))
74# 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)))
75# 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)))
76# 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)))
77# 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)))
78# 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)))
79# 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)))
80# 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)))
81# 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)))
82# 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)))
83# 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)))
84# 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)))
85# 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)))
86# 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)))
87# 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)))
88# 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)))
89# 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)))
90# 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)))
91# 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)))
92# 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)))
93# 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)))
94
95DELAY(DELAY_MAX)
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