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[phoenix]

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- some tweaking in the pre-preprocessed files
    - simplified the invert example
    - added expression::make_foo proto expression generation functionals
    - Applied patch form Jeroen



[SVN r71874]
This commit is contained in:
Thomas Heller
2011-05-11 18:19:15 +00:00
parent b147251846
commit 7211ed3c2d
27 changed files with 353 additions and 360 deletions
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23
example/invert.cpp
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@@ -24,13 +24,15 @@ struct invert_actions
using phoenix::evaluator;
#ifdef _MSC_VER
// redifining evaluator, this is because MSVC chokes on function types like:
// F(G(...))
#define evaluator(A0, A1) proto::call<phoenix::evaluator(A0, A1)>
#endif
template <>
struct invert_actions::when<phoenix::rule::plus>
: proto::call<
proto::functional::make_expr<proto::tag::minus>(
phoenix::expression::make_minus(
evaluator(proto::_left, phoenix::_context)
, evaluator(proto::_right, phoenix::_context)
)
@@ -40,7 +42,7 @@ struct invert_actions::when<phoenix::rule::plus>
template <>
struct invert_actions::when<phoenix::rule::minus>
: proto::call<
proto::functional::make_expr<proto::tag::plus>(
phoenix::expression::make_plus(
evaluator(proto::_left, phoenix::_context)
, evaluator(proto::_right, phoenix::_context)
)
@@ -50,7 +52,7 @@ struct invert_actions::when<phoenix::rule::minus>
template <>
struct invert_actions::when<phoenix::rule::multiplies>
: proto::call<
proto::functional::make_expr<proto::tag::divides>(
phoenix::expression::make_divides(
evaluator(proto::_left, phoenix::_context)
, evaluator(proto::_right, phoenix::_context)
)
@@ -60,7 +62,7 @@ struct invert_actions::when<phoenix::rule::multiplies>
template <>
struct invert_actions::when<phoenix::rule::divides>
: proto::call<
proto::functional::make_expr<proto::tag::multiplies>(
phoenix::expression::make_multiplies(
evaluator(proto::_left, phoenix::_context)
, evaluator(proto::_right, phoenix::_context)
)
@@ -90,19 +92,18 @@ void print_expr(Expr const & expr)
}
template <typename Expr>
typename boost::result_of<
phoenix::evaluator(
typename
boost::phoenix::result_of::eval<
Expr const&
, phoenix::result_of::context<int, invert_actions>::type
)
>::type
, phoenix::result_of::context<boost::mpl::void_, invert_actions>::type
>::type
invert(Expr const & expr)
{
return
phoenix::eval(
expr
, phoenix::context(
int()
boost::mpl::void_()
, invert_actions()
)
);
@@ -122,7 +123,7 @@ int main()
print_expr(_1 * _2 / _3);
print_expr(_1 * _2 + _3);
print_expr(_1 * _2 - _3);
print_expr(phoenix::if_(_1 * _4)[_2 - _3]);
print_expr(if_(_1 * _4)[_2 - _3]);
print_expr(_1 * invert(_2 - _3));
}