+ BOOST_FALLTHROUGH
+
+ The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through + between switch labels: +
+switch (x) { + case 40: + case 41: + if (truth_is_out_there) { + ++x; + BOOST_FALLTHROUGH; // Use instead of/along with annotations in + // comments. + } else { + return x; + } + case 42: + ... ++
+ As shown in the example above, the BOOST_FALLTHROUGH macro should + be followed by a semicolon. It is designed to mimic control-flow + statements like 'break;', so it can be placed in most places where + 'break;' can, but only if there are no statements on the execution + path between it and the next switch label. +
+
+ When compiled with Clang >3.2 in C++11 mode, the BOOST_FALLTHROUGH
+ macro is expanded to [[clang::fallthrough]]
+ attribute, which is analysed when performing switch labels fall-through
+ diagnostic ('-Wimplicit-fallthrough'). See clang documentation
+ on language extensions for details: http://clang.llvm.org/docs/LanguageExtensions.html#clang__fallthrough
+
+ When used with unsupported compilers, the BOOST_FALLTHROUGH macro + has no effect on diagnostics. +
++ In either case this macro has no effect on runtime behavior and + performance of code. +
+
BOOST_EXPLICIT_TEMPLATE_TYPE(t) BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t,v) BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t) BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t,v)
Table of Contents
-Last revised: February 19, 2013 at 16:25:18 GMT |
+Last revised: April 05, 2013 at 23:29:41 GMT |