mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
#ifndef SPROUT_BREED_EVAL_HPP
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#define SPROUT_BREED_EVAL_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/breed/breed_fwd.hpp>
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namespace sprout {
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namespace breed {
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namespace result_of {
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//
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// eval
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//
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template<typename Expr, typename Context>
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struct eval {
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public:
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typedef typename Context::template eval<Expr>::result_type type;
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};
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} // namespace result_of
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namespace functional {
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//
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// eval
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//
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struct eval {
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public:
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SPROUT_BREED_CALLABLE();
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public:
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template<typename Sig>
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struct result;
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template<typename This, typename Expr, typename Context>
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struct result<This(Expr, Context)> {
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typedef typename sprout::breed::result_of::eval<
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typename std::remove_reference<Expr>::type,
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typename std::remove_reference<Context>::type
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>::type type;
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};
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr, Context>::type
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operator()(Expr& e, Context& ctx) const {
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return typename Context::template eval<Expr>()(e, ctx);
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}
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr, Context>::type
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operator()(Expr& e, Context const& ctx) const {
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return typename Context::template eval<Expr>()(e, ctx);
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}
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr const, Context>::type
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operator()(Expr const& e, Context& ctx) const {
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return typename Context::template eval<Expr const>()(e, ctx);
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}
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template<typename Expr, typename Context>
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SPROUT_CONSTEXPR typename sprout::breed::result_of::eval<Expr const, Context>::type
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operator()(Expr const& e, Context const& ctx) const {
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return typename Context::template eval<Expr const>()(e, ctx);
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}
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};
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} // namespace functional
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//
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// eval
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//
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr, Context>::type
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eval(Expr& e, Context& ctx) {
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return typename Context::template eval<Expr>()(e, ctx);
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}
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr, Context>::type
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eval(Expr& e, Context const& ctx) {
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return typename Context::template eval<Expr>()(e, ctx);
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}
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr const, Context>::type
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eval(Expr const& e, Context& ctx) {
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return typename Context::template eval<Expr const>()(e, ctx);
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}
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template<typename Expr, typename Context>
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typename sprout::breed::result_of::eval<Expr const, Context>::type
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SPROUT_CONSTEXPR eval(Expr const& e, Context const& ctx) {
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return typename Context::template eval<Expr const>()(e, ctx);
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}
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} // namespace breed
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} // namespace sprout
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#endif // #ifndef SPROUT_BREED_EVAL_HPP
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