Update of /cvsroot/boost/boost/boost/xpressive/proto
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv15662/proto
Modified Files:
generate.hpp
Log Message:
remove is_allowed<>, short-circuit generate_if<> for default_domain -- big
compile time win
Index: generate.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/xpressive/proto/generate.hpp,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- generate.hpp 5 Apr 2007 20:49:11 -0000 1.2
+++ generate.hpp 19 Apr 2007 03:16:25 -0000 1.3
@@ -31,11 +31,6 @@
}
};
- template<typename Domain, typename Expr, typename EnableIf>
- struct is_allowed
- : matches<Expr, typename Domain::grammar>
- {};
-
namespace detail
{
struct empty
@@ -44,12 +39,17 @@
template<typename Domain, typename Expr>
struct generate_if
: mpl::if_<
- is_allowed<Domain, Expr>
+ matches<Expr, typename Domain::grammar>
, generate<Domain, Expr>
, detail::empty
>::type
{};
+ // Optimization, generate fewer templates...
+ template<typename Expr>
+ struct generate_if<proto::default_domain, Expr>
+ : generate<proto::default_domain, Expr>
+ {};
}
}}
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