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MWCW workaround

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[SVN r12506]
This commit is contained in:
Vesa Karvonen
2002-01-25 15:26:51 +00:00
parent 0021c42186
commit 1fc3933855
1 changed files with 7 additions and 3 deletions
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10
example/delay.cpp
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@ -21,14 +21,18 @@
// 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.
// based delays, because they run out of memory.
//
// On many compilers (e.g. g++, MSVC++), this macro takes only a
// small amount of memory to preprocess. On some compilers (e.g.
// MWCW), however, this macro seems to consume huge amounts of
// memory.
#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(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))))()
#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)))