卜部昌平 4ff3f20540 add #include guard hack ... According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html		2020-04-13 16:06:00 +09:00
..
select
array.h
bignum.h
class.h
compar.h
complex.h
cont.h
dir.h
enum.h
enumerator.h
error.h
eval.h
file.h
gc.h
hash.h
io.h
load.h
marshal.h
numeric.h
object.h
parse.h
proc.h
process.h
random.h
range.h
rational.h
re.h
ruby.h
select.h
signal.h
sprintf.h
string.h
struct.h
thread.h
time.h
variable.h
vm.h