mirror of
https://github.com/boostorg/yap.git
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1534 lines
42 KiB
C++
1534 lines
42 KiB
C++
#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/tuple.hpp>
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#include <boost/hana/type.hpp>
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#include <boost/hana/size.hpp>
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// For printing
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#include <boost/hana/for_each.hpp>
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#include <boost/type_index.hpp>
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#include <iostream>
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#include <cassert> // TODO: For testing.
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#define BOOST_PROTO17_STREAM_OPERATORS // TODO: For testing.
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// TODO: Verbose debugging mode for matching.
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// TODO: Proto-style "Fuzzy and Exact Matches of Terminals".
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namespace boost::proto17 {
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enum class expr_kind {
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terminal,
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placeholder,
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plus,
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minus,
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// etc...
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};
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template <expr_kind Kind, typename ...T>
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struct expression;
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template <typename T>
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using terminal = expression<expr_kind::terminal, T>;
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#define BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN(expr) \
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noexcept(noexcept(expr)) -> decltype(expr) { return expr; }
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namespace adl_detail {
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template <typename T, typename U>
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constexpr auto eval_plus (T && t, U && u) BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN(
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static_cast<T &&>(t) + static_cast<U &&>(u)
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)
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struct eval_plus_fn
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{
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template <typename T, typename U>
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constexpr auto operator() (T && t, U && u) const BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN(
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eval_plus(static_cast<T &&>(t), static_cast<U &&>(u))
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)
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};
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template <typename T, typename U>
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constexpr auto eval_minus (T && t, U && u) BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN(
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static_cast<T &&>(t) - static_cast<U &&>(u)
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)
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struct eval_minus_fn
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{
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template <typename T, typename U>
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constexpr auto operator() (T && t, U && u) const BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN(
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eval_minus(static_cast<T &&>(t), static_cast<U &&>(u))
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)
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};
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}
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#undef BOOST_PROTO17_NOEXCEPT_DECLTYPE_RETURN
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using adl_detail::eval_plus_fn;
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using adl_detail::eval_minus_fn;
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inline namespace function_objects {
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inline constexpr eval_plus_fn eval_plus{};
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inline constexpr eval_minus_fn eval_minus{};
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}
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namespace detail {
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template <typename T>
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struct partial_decay
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{
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using type = T;
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};
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template <typename T>
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struct partial_decay<T[]> { using type = T *; };
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template <typename T, std::size_t N>
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struct partial_decay<T[N]> { using type = T *; };
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template <typename T>
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struct partial_decay<T(&)[]> { using type = T *; };
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template <typename T, std::size_t N>
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struct partial_decay<T(&)[N]> { using type = T *; };
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template <typename R, typename ...A>
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struct partial_decay<R(A...)> { using type = R(*)(A...); };
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template <typename R, typename ...A>
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struct partial_decay<R(A..., ...)> { using type = R(*)(A..., ...); };
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template <typename T,
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typename U = typename detail::partial_decay<T>::type,
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bool AddRValueRef = std::is_same_v<T, U> && !std::is_const_v<U>>
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struct rhs_value_type_phase_1;
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template <typename T, typename U>
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struct rhs_value_type_phase_1<T, U, true>
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{ using type = U &&; };
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template <typename T, typename U>
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struct rhs_value_type_phase_1<T, U, false>
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{ using type = U; };
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template <typename ...T>
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struct is_expr
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{ static bool const value = false; };
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template <expr_kind Kind, typename ...T>
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struct is_expr<expression<Kind, T...>>
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{ static bool const value = true; };
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template <typename T,
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typename U = typename rhs_value_type_phase_1<T>::type,
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bool RemoveRefs = std::is_rvalue_reference_v<U>,
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bool IsExpr = is_expr<std::decay_t<T>>::value>
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struct rhs_type;
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template <typename T, typename U, bool RemoveRefs>
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struct rhs_type<T, U, RemoveRefs, true>
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{ using type = std::remove_cv_t<std::remove_reference_t<T>>; };
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template <typename T, typename U>
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struct rhs_type<T, U, true, false>
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{ using type = terminal<std::remove_reference_t<U>>; };
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template <typename T, typename U>
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struct rhs_type<T, U, false, false>
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{ using type = terminal<U>; };
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constexpr bool is_hana_llong (...)
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{ return false; }
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template <long long I>
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constexpr bool is_hana_llong(hana::basic_type<hana::llong<I>>)
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{ return true; };
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// TODO: Fix.
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template <typename Tuple, long long I>
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auto get_tuple_element(Tuple && tuple, hana::tuple<hana::llong<I>>)
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{ return hana::at_c<I>(tuple); };
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template <typename Tuple, expr_kind Kind, typename ...T>
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auto default_eval_expr (expression<Kind, T...> const & expr, Tuple && tuple)
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{
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using namespace hana::literals;
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if constexpr (Kind == expr_kind::terminal) {
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static_assert(sizeof...(T) == 1);
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return expr.elements[0_c];
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} else if constexpr (Kind == expr_kind::placeholder) {
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static_assert(sizeof...(T) == 1);
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// TODO: Fix.
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return get_tuple_element(tuple, expr.elements);
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} else if constexpr (Kind == expr_kind::plus) {
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return
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eval_plus(
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default_eval_expr(expr.elements[0_c], static_cast<Tuple &&>(tuple)),
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default_eval_expr(expr.elements[1_c], static_cast<Tuple &&>(tuple))
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);
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} else if constexpr (Kind == expr_kind::minus) {
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return
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eval_minus(
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default_eval_expr(expr.elements[0_c], static_cast<Tuple &&>(tuple)),
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default_eval_expr(expr.elements[1_c], static_cast<Tuple &&>(tuple))
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);
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} else {
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assert(false && "Unhandled expr_kind in default_evaluate!");
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return;
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}
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}
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}
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// TODO: Customization point.
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// TODO: static assert/SFINAE std::is_callable<>
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// TODO: static assert/SFINAE no placeholders
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template <typename R, expr_kind Kind, typename ...T>
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R evaluate_expression_as (expression<Kind, T...> const & expr)
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{ return static_cast<R>(detail::default_eval_expr(expr, hana::tuple<>())); }
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// TODO: static assert/SFINAE std::is_callable<>
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template <typename Expr, typename ...T>
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auto evaluate (Expr const & expr, T && ...t)
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{ return detail::default_eval_expr(expr, hana::make_tuple(static_cast<T &&>(t)...)); }
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template <expr_kind Kind, typename ...T>
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struct expression
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{
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using this_type = expression<Kind, T...>;
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using tuple_type = hana::tuple<T...>;
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static const expr_kind kind = Kind;
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expression (T && ... t) :
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elements (static_cast<T &&>(t)...)
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{}
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expression (hana::tuple<T...> const & rhs) :
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elements (rhs)
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{}
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expression (hana::tuple<T...> && rhs) :
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elements (std::move(rhs))
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{}
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expression & operator= (hana::tuple<T...> const & rhs)
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{ elements = rhs.elements; }
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expression & operator= (hana::tuple<T...> && rhs)
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{ elements = std::move(rhs.elements); }
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tuple_type elements;
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template <typename R>
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operator R ()
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{ return evaluate_expression_as<R>(*this); }
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template <typename U>
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auto operator+ (U && rhs) const &
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{
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using rhs_type = typename detail::rhs_type<U>::type;
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return expression<expr_kind::plus, this_type, rhs_type>{
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hana::tuple<this_type, rhs_type>{*this, rhs_type{static_cast<U &&>(rhs)}}
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};
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}
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template <typename U>
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auto operator+ (U && rhs) &&
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{
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using rhs_type = typename detail::rhs_type<U>::type;
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return expression<expr_kind::plus, this_type, rhs_type>{
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hana::tuple<this_type, rhs_type>{std::move(*this), rhs_type{static_cast<U &&>(rhs)}}
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};
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}
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template <typename U>
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auto operator- (U && rhs) const &
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{
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using rhs_type = typename detail::rhs_type<U>::type;
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return expression<expr_kind::minus, this_type, rhs_type>{
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hana::tuple<this_type, rhs_type>{*this, rhs_type{static_cast<U &&>(rhs)}}
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};
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}
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template <typename U>
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auto operator- (U && rhs) &&
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{
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using rhs_type = typename detail::rhs_type<U>::type;
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return expression<expr_kind::minus, this_type, rhs_type>{
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hana::tuple<this_type, rhs_type>{std::move(*this), rhs_type{static_cast<U &&>(rhs)}}
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};
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}
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};
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template <long long I>
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using placeholder = expression<expr_kind::placeholder, hana::llong<I>>;
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namespace literals {
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template <char ...c>
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constexpr auto operator"" _p ()
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{
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using i = hana::llong<hana::ic_detail::parse<sizeof...(c)>({c...})>;
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return expression<expr_kind::placeholder, i>(i{});
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}
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}
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namespace match {
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template <typename KindMatches, typename ...T>
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struct expression
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{
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KindMatches kind_matches;
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hana::tuple<T...> elements;
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};
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// TODO: Use this to detect identical types within a match.
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template <long long I>
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struct placeholder : hana::llong<I> {};
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}
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template <typename KindMatches, typename T>
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constexpr bool is_match_expression (hana::basic_type<T>)
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{ return false; }
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template <typename KindMatches, typename ...T>
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constexpr bool is_match_expression (hana::basic_type<match::expression<KindMatches, T...>>)
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{ return true; }
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namespace literals {
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template <char ...c>
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constexpr auto operator"" _T ()
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{ return match::placeholder<hana::ic_detail::parse<sizeof...(c)>({c...})>{}; }
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}
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namespace detail {
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inline std::ostream & print_kind (std::ostream & os, expr_kind kind)
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{
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switch (kind) {
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case expr_kind::plus: return os << "+";
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case expr_kind::minus: return os << "-";
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// TODO
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default: return os << "** ERROR: UNKNOWN OPERATOR! **";
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}
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}
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template <typename T>
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auto print_value (std::ostream & os, T const & x) -> decltype(os << x)
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{ return os << x; }
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inline std::ostream & print_value (std::ostream & os, ...)
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{ return os << "<<unprintable-value>>"; }
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template <typename T>
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std::ostream & print_type (std::ostream & os)
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{
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os << typeindex::type_id<T>().pretty_name();
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if (std::is_const_v<T>)
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os << " const";
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if (std::is_volatile_v<T>)
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os << " volatile";
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using no_cv_t = std::remove_cv_t<T>;
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if (std::is_lvalue_reference_v<T>)
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os << " &";
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if (std::is_rvalue_reference_v<T>)
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os << " &&";
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return os;
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}
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template <expr_kind Kind, typename T, typename ...Ts>
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std::ostream & print_impl (
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std::ostream & os,
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expression<Kind, T, Ts...> const & expr,
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int indent,
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char const * indent_str)
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{
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for (int i = 0; i < indent; ++i) {
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os << indent_str;
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}
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if constexpr (Kind == expr_kind::terminal) {
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using namespace hana::literals;
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static_assert(sizeof...(Ts) == 0);
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os << "term<";
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print_type<T>(os);
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os << ">[=";
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print_value(os, expr.elements[0_c]);
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os << "]\n";
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} else if constexpr (Kind == expr_kind::placeholder) {
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using namespace hana::literals;
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static_assert(sizeof...(Ts) == 0);
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os << "placeholder<" << (long long)expr.elements[0_c] << ">\n";
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} else {
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os << "expr<";
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print_kind(os, Kind);
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os << ">\n";
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hana::for_each(expr.elements, [&os, indent, indent_str](auto const & element) {
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print_impl(os, element, indent + 1, indent_str);
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});
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}
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return os;
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}
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}
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template <typename T>
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std::ostream & print (std::ostream & os, terminal<T> const & term)
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{ return detail::print_impl(os, term, 0, " "); }
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template <expr_kind Kind, typename ...T>
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std::ostream & print (std::ostream & os, expression<Kind, T...> const & expr)
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{ return detail::print_impl(os, expr, 0, " "); }
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#if defined(BOOST_PROTO17_STREAM_OPERATORS)
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template <typename T>
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std::ostream & operator<< (std::ostream & os, terminal<T> const & term)
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{ return detail::print_impl(os, term, 0, " "); }
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template <expr_kind Kind, typename ...T>
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std::ostream & operator<< (std::ostream & os, expression<Kind, T...> const & expr)
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{ return detail::print_impl(os, expr, 0, " "); }
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#endif
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namespace detail {
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inline bool matches (...)
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{ return false; }
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template <typename MatchExpr, typename TreeExpr>
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bool matches (MatchExpr const & match_subtree, TreeExpr const & subtree);
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template <std::size_t I, typename MatchExpr, typename TreeExpr>
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void recursive_match_impl (MatchExpr const & match_subtree, TreeExpr const & subtree, bool & result)
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{
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if (!matches(match_subtree[hana::size_c<I>], subtree[hana::size_c<I>])) {
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result = false;
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}
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if constexpr (0 < I) {
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recursive_match_impl<I - 1>(match_subtree, subtree, result);
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}
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}
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template <typename MatchExpr, typename TreeExpr>
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bool matches (MatchExpr const & match_subtree, TreeExpr const & subtree)
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{
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static_assert(is_match_expression(hana::typeid_(match_subtree)),
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"Attempted to use a non-tree as a match expression.");
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static_assert(is_expression(hana::typeid_(subtree)),
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"Attempted to use find a match in a non-tree.");
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// TODO: Verbose mode.
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if (!match_subtree.kind_matches(subtree)) {
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return false;
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} else {
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auto constexpr subtree_size = hana::size(subtree.elements);
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if constexpr (hana::size(match_subtree.elements) != subtree_size) {
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// TODO: Verbose mode.
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return false;
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} else {
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bool children_match = true;
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recursive_match_impl<subtree_size - 1>(
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match_subtree.elements,
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subtree.elements,
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children_match
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);
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return children_match;
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}
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}
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}
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template <typename Matcher, typename Callable, expr_kind Kind, typename ...T>
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auto mutate_subtrees_of (
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Matcher const & match_subtree,
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expression<Kind, T...> & tree,
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Callable && mutation
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) {
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// TODO: Process children first.
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if (matches(match_subtree, tree)) {
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return mutation(tree);
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} else if (Kind == expr_kind::terminal) {
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return tree;
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} else {
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auto mutate_child = [&match_subtree, &mutation] (auto & t) {
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return mutate_subtrees_of(match_subtree, t, static_cast<Callable &&>(mutation));
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};
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auto return_elements = hana::transform(tree.elements, mutate_child);
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return make_expression(Kind, std::move(return_elements));
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}
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}
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}
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}
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#include <string>
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template <typename T>
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using term = boost::proto17::terminal<T>;
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namespace bp17 = boost::proto17;
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using namespace std::string_literals;
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void term_plus_x ()
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{
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// char const * string
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{
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term<double> unity{1.0};
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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term<char const *>
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> unevaluated_expr = unity + "3";
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}
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// std::string temporary
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{
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term<double> unity{1.0};
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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term<std::string>
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> unevaluated_expr = unity + "3"s;
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}
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// arrays
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{
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term<double> unity{1.0};
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int ints[] = {1, 2};
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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term<int *>
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> unevaluated_expr = unity + ints;
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}
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{
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term<double> unity{1.0};
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int const ints[] = {1, 2};
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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term<int const *>
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> unevaluated_expr = unity + ints;
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}
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{
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term<double> unity{1.0};
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int ints[] = {1, 2};
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bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int *>
|
|
> unevaluated_expr = unity + std::move(ints);
|
|
}
|
|
|
|
// pointers
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
int * int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int * &>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int const ints[] = {1, 2};
|
|
int const * int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const * &>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
int * int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int *>
|
|
> unevaluated_expr = unity + std::move(int_ptr);
|
|
}
|
|
|
|
// const pointers
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
int * const int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int * const &>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int const ints[] = {1, 2};
|
|
int const * const int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const * const &>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
int * const int_ptr = ints;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int * const>
|
|
> unevaluated_expr = unity + std::move(int_ptr);
|
|
}
|
|
|
|
// values
|
|
{
|
|
term<double> unity{1.0};
|
|
int i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int const i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> unevaluated_expr = unity + std::move(i);
|
|
}
|
|
}
|
|
|
|
void term_plus_x_this_ref_overloads()
|
|
{
|
|
{
|
|
term<double> unity{1.0};
|
|
int i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> const unity{1.0};
|
|
int i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i = 1;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = std::move(unity) + i;
|
|
}
|
|
}
|
|
|
|
void term_plus_term ()
|
|
{
|
|
// char const * string
|
|
{
|
|
term<double> unity{1.0};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<char const *>
|
|
> unevaluated_expr = unity + term<char const *>{"3"};
|
|
}
|
|
|
|
// std::string temporary
|
|
{
|
|
term<double> unity{1.0};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<std::string>
|
|
> unevaluated_expr = unity + term<std::string>{"3"s};
|
|
}
|
|
|
|
// pointers
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints_[] = {1, 2};
|
|
term<int *> ints = {ints_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int *>
|
|
> unevaluated_expr = unity + ints;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int const ints_[] = {1, 2};
|
|
term<int const *> ints = {ints_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const *>
|
|
> unevaluated_expr = unity + ints;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints_[] = {1, 2};
|
|
term<int *> ints = {ints_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int *>
|
|
> unevaluated_expr = unity + std::move(ints);
|
|
}
|
|
|
|
// const pointers
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
term<int * const> int_ptr = {ints};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int * const>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int const ints[] = {1, 2};
|
|
term<int const * const> int_ptr = {ints};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const * const>
|
|
> unevaluated_expr = unity + int_ptr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int ints[] = {1, 2};
|
|
term<int * const> int_ptr = {ints};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int * const>
|
|
> unevaluated_expr = unity + std::move(int_ptr);
|
|
}
|
|
|
|
// values
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int const> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> unevaluated_expr = unity + std::move(i);
|
|
}
|
|
|
|
// const value terminals
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> const i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int const> const i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
// lvalue refs
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int const &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
> unevaluated_expr = unity + i;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> unevaluated_expr = unity + std::move(i);
|
|
}
|
|
|
|
// rvalue refs
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> unevaluated_expr = unity + std::move(i);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> unevaluated_expr = unity + std::move(i);
|
|
}
|
|
}
|
|
|
|
void term_plus_expr ()
|
|
{
|
|
// values
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int const> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
// const value terminals/expressions
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> const i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> const expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
term<int> i = {1};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
> const expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
// lvalue refs
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int const &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
>
|
|
> unevaluated_expr = unity + expr;
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int const &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
> expr = unity + i;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
// rvalue refs
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 1;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
}
|
|
|
|
void placeholders ()
|
|
{
|
|
using namespace boost::proto17::literals;
|
|
|
|
{
|
|
bp17::placeholder<0> p0 = 0_p;
|
|
}
|
|
|
|
{
|
|
bp17::placeholder<0> p0 = 0_p;
|
|
term<double> unity{1.0};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
bp17::placeholder<0>,
|
|
term<double>
|
|
> expr = p0 + unity;
|
|
}
|
|
|
|
{
|
|
bp17::placeholder<0> p0 = 0_p;
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
bp17::placeholder<0>,
|
|
bp17::placeholder<1>
|
|
> expr = p0 + 1_p;
|
|
}
|
|
}
|
|
|
|
void const_term_expr ()
|
|
{
|
|
{
|
|
term<double const> unity{1.0};
|
|
int i_ = 42;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double const>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double const>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double const>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> const unity{1.0};
|
|
int i_ = 42;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 42;
|
|
term<int const &> i{i_};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
> const expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int const &>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
}
|
|
}
|
|
|
|
void print ()
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 42;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
|
|
std::cout << "================================================================================\n";
|
|
bp17::print(std::cout, unity);
|
|
std::cout << "================================================================================\n";
|
|
bp17::print(std::cout, expr);
|
|
std::cout << "================================================================================\n";
|
|
bp17::print(std::cout, unevaluated_expr);
|
|
|
|
struct thing {};
|
|
term<thing> a_thing(thing{});
|
|
std::cout << "================================================================================\n";
|
|
bp17::print(std::cout, a_thing);
|
|
|
|
std::cout << "\n";
|
|
std::cout << "================================================================================\n";
|
|
std::cout << "================================================================================\n";
|
|
{
|
|
using namespace boost::proto17::literals;
|
|
std::cout << (0_p + unity);
|
|
std::cout << (2_p + 3_p);
|
|
std::cout << (unity + 1_p);
|
|
}
|
|
|
|
#if defined(BOOST_PROTO17_STREAM_OPERATORS)
|
|
std::cout << "\n";
|
|
std::cout << "================================================================================\n";
|
|
std::cout << "================================================================================\n";
|
|
std::cout << unity;
|
|
std::cout << "================================================================================\n";
|
|
std::cout << expr;
|
|
std::cout << "================================================================================\n";
|
|
std::cout << unevaluated_expr;
|
|
std::cout << "================================================================================\n";
|
|
std::cout << a_thing;
|
|
#endif
|
|
}
|
|
|
|
void default_eval ()
|
|
{
|
|
term<double> unity{1.0};
|
|
int i_ = 42;
|
|
term<int &&> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::minus,
|
|
term<double>,
|
|
term<int &&>
|
|
> expr = unity - std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<double>,
|
|
bp17::expression<
|
|
bp17::expr_kind::minus,
|
|
term<double>,
|
|
term<int &&>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
|
|
{
|
|
double result = unity;
|
|
std::cout << "unity=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = expr;
|
|
std::cout << "expr=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = unevaluated_expr;
|
|
std::cout << "unevaluated_expr=" << result << "\n"; // -40
|
|
}
|
|
|
|
{
|
|
double result = evaluate(unity, boost::hana::make_tuple(5, 6, 7));
|
|
std::cout << "evaluate(unity)=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = evaluate(expr, boost::hana::make_tuple());
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = evaluate(unevaluated_expr, boost::hana::make_tuple(std::string("15")));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // -40
|
|
}
|
|
}
|
|
|
|
namespace test {
|
|
|
|
struct number
|
|
{
|
|
explicit operator double () const { return value; }
|
|
|
|
double value;
|
|
};
|
|
|
|
// User-defined binary-plus! With weird semantics!
|
|
inline auto eval_plus (number a, number b)
|
|
{ return number{a.value - b.value}; }
|
|
|
|
}
|
|
|
|
void eval ()
|
|
{
|
|
term<test::number> unity{{1.0}};
|
|
double d_ = 42.0;
|
|
term<test::number> i{{d_}};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<test::number>,
|
|
term<test::number>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<test::number>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<test::number>,
|
|
term<test::number>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
|
|
{
|
|
double result = unity;
|
|
std::cout << "unity=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = expr;
|
|
std::cout << "expr=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = unevaluated_expr;
|
|
std::cout << "unevaluated_expr=" << result << "\n"; // 42
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(unity, boost::hana::make_tuple(5, 6, 7));
|
|
std::cout << "evaluate(unity)=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(expr, boost::hana::make_tuple());
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(unevaluated_expr, boost::hana::make_tuple(std::string("15")));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // 42
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
void placeholder_eval ()
|
|
{
|
|
using namespace boost::proto17::literals;
|
|
|
|
bp17::placeholder<2> p2 = 2_p;
|
|
int i_ = 42;
|
|
term<int> i{std::move(i_)};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
bp17::placeholder<2>,
|
|
term<int>
|
|
> expr = p2 + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
bp17::placeholder<2>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
bp17::placeholder<2>,
|
|
term<int>
|
|
>
|
|
> unevaluated_expr = p2 + std::move(expr);
|
|
|
|
{
|
|
double result = evaluate(p2, boost::hana::make_tuple(5, 6, 7));
|
|
std::cout << "evaluate(p2)=" << result << "\n"; // 7
|
|
}
|
|
|
|
{
|
|
double result = evaluate(expr, boost::hana::make_tuple(std::string("15"), 3, 1));
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // 43
|
|
}
|
|
|
|
{
|
|
double result = evaluate(unevaluated_expr, boost::hana::make_tuple(std::string("15"), 2, 3));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // 48
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int main ()
|
|
{
|
|
term_plus_x();
|
|
term_plus_x_this_ref_overloads();
|
|
term_plus_term();
|
|
term_plus_expr();
|
|
placeholders();
|
|
|
|
const_term_expr();
|
|
|
|
print();
|
|
|
|
default_eval();
|
|
eval();
|
|
|
|
#if 0 // TODO: Fix.
|
|
placeholder_eval();
|
|
#endif
|
|
|
|
#if 0 // TODO
|
|
{
|
|
bp17::terminal<double> unity{1.0};
|
|
|
|
auto unevaluated_expr = unity + "3";
|
|
auto mutated_expr = mutate(unevaluated_expr, match_expr, mutation);
|
|
auto result = bp17::eval(unevaluated_expr);
|
|
}
|
|
|
|
{
|
|
bp17::terminal<double> a{1.0};
|
|
bp17::terminal<double> x{2.0};
|
|
bp17::terminal<int> b{3};
|
|
|
|
auto unevaluated_expr = a * x + b;
|
|
auto match_expr = 0_T * 0_T + 1_T;
|
|
auto mutated_expr = mutate(unevaluated_expr, match_expr, mutation);
|
|
auto result = bp17::eval(mutated_expr);
|
|
}
|
|
|
|
{
|
|
bp17::terminal<double> a{1.0};
|
|
bp17::terminal<double> x{2.0};
|
|
bp17::terminal<int> b{3};
|
|
|
|
auto match_double_2 = [] (auto && terminal) {
|
|
if constexpr (hana::typeid_(terminal) == hana::type<double>{})
|
|
return terminal == 2.0;
|
|
else
|
|
return false;
|
|
};
|
|
|
|
auto unevaluated_expr = a * x + b;
|
|
auto match_expr = bp17::match<double> * match_double_2 + 0_T;
|
|
auto mutated_expr = mutate(unevaluated_expr, match_expr, mutation);
|
|
auto result = bp17::eval(mutated_expr);
|
|
}
|
|
#endif
|
|
}
|