boostorg/preprocessor
1
0
Fork 1
mirror of https://github.com/boostorg/preprocessor.git synced 2025-07-13 20:46:34 +02:00
Code Issues Packages Projects Releases Wiki Activity

MWCW workaround

Browse Source 
[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
Download Patch File Download Diff File Expand all files Collapse all files

10
example/delay.cpp
View File

@ -21,14 +21,18 @@
// Template metaprogramming can be used for implementing similar // Template metaprogramming can be used for implementing similar
// delays. Unfortunately template instantiation consumes memory, // delays. Unfortunately template instantiation consumes memory,
// therefore compilers usually fail to fully compile long template // therefore compilers usually fail to fully compile long template
// based delays, because they run out of memory. This macro takes // based delays, because they run out of memory.
// only small (O(N)) amount of memory to preprocess. //
// 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 #ifndef DELAY_MAX
#define DELAY_MAX 16 #define DELAY_MAX 16
#endif #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_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_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_F1(D,N) BOOST_PP_IF(1,BOOST_PP_DEC(N),BOOST_PP_WHILE##D(DELAY_C,DELAY_F##N,BOOST_PP_DEC(N)))