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Comment clarification from Giovanni Bajo <giovannibajo-at-libero.it>

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and me.


[SVN r18031]
This commit is contained in:
Dave Abrahams
2003-03-20 15:26:40 +00:00
parent d7dcef4f46
commit cac5f11a3f
1 changed files with 14 additions and 9 deletions
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23
include/boost/detail/workaround.hpp
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@ -20,16 +20,21 @@
//
// (BOOST_MSVC) != 0 && (BOOST_MSVC) <= 1200
//
// When used for workarounds on the latest known version of a
// compiler, the following convention should be observed:
// When used for workarounds that apply to the latest known version
// and all earlier versions of a compiler, the following convention
// should be observed:
//
// #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1301))
//
// The version number in this case corresponds to the last version in
// which the workaround was known to have been required. It only has
// value as a comment unless BOOST_DETECT_OUTDATED_WORKAROUNDS is
// defined, in which case a compiler warning or error will be issued
// when the compiler version exceeds the argument to BOOST_TESTED_AT
// which the workaround was known to have been required. When
// BOOST_DETECT_OUTDATED_WORKAROUNDS is not the defined, the macro
// BOOST_TESTED_AT(x) expands to "!= 0", which effectively activates
// the workaround for any version of the compiler. When
// BOOST_DETECT_OUTDATED_WORKAROUNDS is defined, a compiler warning or
// error will be issued if the compiler version exceeds the argument
// to BOOST_TESTED_AT(). This can be used to locate workarounds which
// may be obsoleted by newer versions.
# ifndef BOOST_STRICT_CONFIG
@ -48,9 +53,9 @@
// When "test" is BOOST_TESTED_AT(x) and
// BOOST_DETECT_OUTDATED_WORKAROUNDS is #defined,
//
// symbol test => 1 if symbol <= x, -1 otherwise
// (symbol test) + 1 => 2 if symbol <= x, 0 otherwise
// 1 % ((symbol test) + 1) => 1 if symbol <= x, zero divide otherwise
// symbol test => if symbol <= x then 1 else -1
// (symbol test) + 1 => if symbol <= x then 2 else 0
// 1 % ((symbol test) + 1) => if symbol <= x then 1 else divide-by-zero
//
# ifdef BOOST_DETECT_OUTDATED_WORKAROUNDS