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1525 lines
39 KiB
C++
1525 lines
39 KiB
C++
#include "expression.hpp"
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#define BOOST_PROTO17_STREAM_OPERATORS // TODO: For testing.
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#include "print.hpp"
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#include <algorithm>
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#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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// 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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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 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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template <typename F>
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auto make_terminal (F && f)
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{
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return expression<expr_kind::terminal, F>{
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hana::tuple<F>{static_cast<F &&>(f)}
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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<
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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 + std::move(ints);
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}
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// pointers
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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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int * int_ptr = ints;
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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 + int_ptr;
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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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int const * int_ptr = ints;
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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 + int_ptr;
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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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int * int_ptr = ints;
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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 + std::move(int_ptr);
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}
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// const pointers
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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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int * const int_ptr = ints;
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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 + int_ptr;
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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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int const * const int_ptr = ints;
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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 * const &>
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> unevaluated_expr = unity + int_ptr;
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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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int * const int_ptr = ints;
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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 + std::move(int_ptr);
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}
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// values
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{
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term<double> unity{1.0};
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int i = 1;
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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 + i;
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}
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{
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term<double> unity{1.0};
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int const i = 1;
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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 + i;
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}
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{
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term<double> unity{1.0};
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int i = 1;
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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 + std::move(i);
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}
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}
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void term_plus_x_this_ref_overloads()
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{
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{
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term<double> unity{1.0};
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int i = 1;
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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 + i;
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}
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{
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term<double> const unity{1.0};
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int i = 1;
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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 + i;
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}
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{
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term<double> unity{1.0};
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int i = 1;
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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 = std::move(unity) + i;
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}
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}
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void term_plus_term ()
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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 + term<char const *>{"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 + term<std::string>{"3"s};
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}
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// pointers
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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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term<int *> ints = {ints_};
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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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term<int const *> ints = {ints_};
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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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term<int *> ints = {ints_};
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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 + std::move(ints);
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}
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// const pointers
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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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term<int * const> int_ptr = {ints};
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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 + int_ptr;
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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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term<int const * const> int_ptr = {ints};
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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 * const>
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> unevaluated_expr = unity + int_ptr;
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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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term<int * const> int_ptr = {ints};
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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 + std::move(int_ptr);
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}
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// values
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{
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term<double> unity{1.0};
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term<int> i = {1};
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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 + i;
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}
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{
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term<double> unity{1.0};
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term<int const> i = {1};
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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 + i;
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}
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{
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term<double> unity{1.0};
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term<int> i = {1};
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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 + std::move(i);
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}
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// const value terminals
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{
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term<double> unity{1.0};
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term<int> const i = {1};
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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 + i;
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}
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{
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term<double> unity{1.0};
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term<int const> const i = {1};
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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 + i;
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}
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// lvalue refs
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{
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term<double> unity{1.0};
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int i_ = 1;
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term<int &> i{i_};
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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 + i;
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}
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{
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term<double> unity{1.0};
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int i_ = 1;
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term<int const &> i{i_};
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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 + i;
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}
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{
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term<double> unity{1.0};
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int i_ = 1;
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term<int &> i{i_};
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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 + std::move(i);
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}
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// rvalue refs
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{
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term<double> unity{1.0};
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int i_ = 1;
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term<int &&> i{std::move(i_)};
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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 + std::move(i);
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}
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{
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term<double> unity{1.0};
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int i_ = 1;
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term<int &&> i{std::move(i_)};
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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 + std::move(i);
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}
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}
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void term_plus_expr ()
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{
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// values
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{
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term<double> unity{1.0};
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term<int> i = {1};
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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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> expr = unity + i;
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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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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>
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> unevaluated_expr = unity + expr;
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}
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{
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term<double> unity{1.0};
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term<int const> i = {1};
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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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> expr = unity + i;
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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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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>
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> unevaluated_expr = unity + expr;
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}
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|
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{
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term<double> unity{1.0};
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term<int> i = {1};
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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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> expr = unity + std::move(i);
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bp17::expression<
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bp17::expr_kind::plus,
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term<double>,
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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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>
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> unevaluated_expr = unity + expr;
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}
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|
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// const value terminals/expressions
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|
{
|
|
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 ()
|
|
{
|
|
std::cout << "\ndefault_eva()\n";
|
|
|
|
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, 5, 6, 7);
|
|
std::cout << "evaluate(unity)=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = evaluate(expr);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = evaluate(unevaluated_expr, std::string("15"));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // -40
|
|
}
|
|
|
|
std::cout << "\n";
|
|
}
|
|
|
|
namespace user {
|
|
|
|
struct number
|
|
{
|
|
explicit operator double () const { return value; }
|
|
|
|
double value;
|
|
};
|
|
|
|
// User-defined binary-plus! With weird semantics!
|
|
template <typename A, typename B>
|
|
inline auto eval_plus (A a, B b)
|
|
{ return number{a.value - b.value}; }
|
|
|
|
template <typename E, typename ...T>
|
|
constexpr auto eval_expression_as (
|
|
E const & expr,
|
|
boost::hana::basic_type<user::number>,
|
|
T && ...t)
|
|
{
|
|
std::cout << "User eval! ";
|
|
return static_cast<user::number>(
|
|
bp17::detail::default_eval_expr(
|
|
expr,
|
|
boost::hana::make_tuple(static_cast<T &&>(t)...)
|
|
)
|
|
);
|
|
}
|
|
|
|
}
|
|
|
|
void user_operator_eval ()
|
|
{
|
|
std::cout << "\nuser_operator_eval()\n";
|
|
|
|
term<user::number> unity{{1.0}};
|
|
double d_ = 42.0;
|
|
term<user::number> i{{d_}};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
term<user::number>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
term<user::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, 5, 6, 7);
|
|
std::cout << "evaluate(unity)=" << result << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(expr);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(unevaluated_expr, std::string("15"));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // 42
|
|
}
|
|
|
|
std::cout << "\n";
|
|
}
|
|
|
|
void user_eval_expression_as ()
|
|
{
|
|
term<user::number> unity{{1.0}};
|
|
double d_ = 42.0;
|
|
term<user::number> i{{d_}};
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
term<user::number>
|
|
> expr = unity + std::move(i);
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
bp17::expression<
|
|
bp17::expr_kind::plus,
|
|
term<user::number>,
|
|
term<user::number>
|
|
>
|
|
> unevaluated_expr = unity + std::move(expr);
|
|
|
|
std::cout << "\nuser_eval_expression_as()\n";
|
|
|
|
{
|
|
user::number result = unity;
|
|
std::cout << "unity=" << result.value << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
user::number result = expr;
|
|
std::cout << "expr=" << result.value << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
user::number result = unevaluated_expr;
|
|
std::cout << "unevaluated_expr=" << result.value << "\n"; // 42
|
|
}
|
|
|
|
{
|
|
user::number result = evaluate(unity, 5, 6, 7);
|
|
std::cout << "evaluate(unity)=" << result.value << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(expr);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
double result = (double)evaluate(unevaluated_expr, std::string("15"));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // 42
|
|
}
|
|
|
|
{
|
|
user::number result = bp17::evaluate_as<user::number>(unity, 5, 6, 7);
|
|
std::cout << "evaluate(unity)=" << result.value << "\n"; // 1
|
|
}
|
|
|
|
{
|
|
user::number result = bp17::evaluate_as<user::number>(expr);
|
|
std::cout << "evaluate(expr)=" << result.value << "\n"; // -41
|
|
}
|
|
|
|
{
|
|
user::number result = bp17::evaluate_as<user::number>(unevaluated_expr, std::string("15"));
|
|
std::cout << "evaluate(unevaluated_expr)=" << result.value << "\n"; // 42
|
|
}
|
|
|
|
std::cout << "\n";
|
|
}
|
|
|
|
void placeholder_eval ()
|
|
{
|
|
std::cout << "\nplaceholder_eval()\n";
|
|
|
|
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, 5, 6, 7);
|
|
std::cout << "evaluate(p2)=" << result << "\n"; // 7
|
|
}
|
|
|
|
{
|
|
double result = evaluate(expr, std::string("15"), 3, 1);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // 43
|
|
}
|
|
|
|
{
|
|
double result = evaluate(unevaluated_expr, std::string("15"), 2, 3);
|
|
std::cout << "evaluate(unevaluated_expr)=" << result << "\n"; // 48
|
|
}
|
|
|
|
std::cout << "\n";
|
|
}
|
|
|
|
namespace user {
|
|
|
|
inline auto max (int a, int b)
|
|
{ return a < b ? b : a; };
|
|
|
|
struct tag_type {};
|
|
|
|
inline number tag_function (double a, double b)
|
|
{ return number{a + b}; }
|
|
|
|
// User-defined operator() implementation.
|
|
template <typename F, typename ...T>
|
|
inline auto eval_call (F && f, T && ...t)
|
|
{
|
|
if constexpr (sizeof...(T) == 2u && std::is_same_v<std::decay_t<F>, tag_type>) {
|
|
return tag_function((double)t...);
|
|
} else {
|
|
assert(!"Unhandled case in eval_call()");
|
|
return;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
void call_expr ()
|
|
{
|
|
std::cout << "\ncall_expr()\n";
|
|
|
|
using namespace boost::proto17::literals;
|
|
|
|
{
|
|
bp17::expression<
|
|
bp17::expr_kind::call,
|
|
bp17::placeholder<0>,
|
|
bp17::placeholder<1>,
|
|
bp17::placeholder<2>
|
|
> expr = 0_p(1_p, 2_p);
|
|
|
|
{
|
|
auto min = [] (int a, int b) { return a < b ? a : b; };
|
|
int result = evaluate(expr, min, 3, 7);
|
|
std::cout << "evaluate(expr, min, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
|
|
{
|
|
int result = evaluate(expr, &user::max, 3, 7);
|
|
std::cout << "evaluate(expr, &user::max, 3, 7)=" << result << "\n"; // 7
|
|
}
|
|
|
|
{
|
|
int result = evaluate(expr, user::max, 3, 7);
|
|
std::cout << "evaluate(expr, user::max, 3, 7)=" << result << "\n"; // 7
|
|
}
|
|
}
|
|
|
|
{
|
|
auto min_lambda = [] (int a, int b) { return a < b ? a : b; };
|
|
|
|
{
|
|
auto min = bp17::make_terminal(min_lambda);
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
|
|
{
|
|
term<decltype(min_lambda)> min = {{min_lambda}};
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
struct min_function_object_t
|
|
{
|
|
auto operator() (int a, int b) const { return a < b ? a : b; }
|
|
} min_function_object;
|
|
|
|
{
|
|
term<min_function_object_t> min = bp17::make_terminal(min_function_object);
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
using namespace boost::hana::literals;
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
|
|
{
|
|
term<min_function_object_t> min = {{min_function_object}};
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
|
|
{
|
|
auto min = bp17::make_terminal(min_function_object_t{});
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
|
|
{
|
|
term<min_function_object_t> min = {{min_function_object_t{}}};
|
|
auto expr = min(0_p, 1_p);
|
|
|
|
{
|
|
int result = evaluate(expr, 3, 7);
|
|
std::cout << "evaluate(expr, 3, 7)=" << result << "\n"; // 3
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
{
|
|
auto min_lambda = [] (int a, int b) { return a < b ? a : b; };
|
|
|
|
{
|
|
auto min = bp17::make_terminal(min_lambda);
|
|
auto expr = min(0, 1);
|
|
|
|
{
|
|
int result = evaluate(expr);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // 0
|
|
}
|
|
}
|
|
|
|
{
|
|
term<decltype(min_lambda)> min = {{min_lambda}};
|
|
bp17::expression<
|
|
bp17::expr_kind::call,
|
|
term<decltype(min_lambda)>,
|
|
term<int>,
|
|
term<int>
|
|
> expr = min(0, 1);
|
|
|
|
{
|
|
int result = evaluate(expr);
|
|
std::cout << "evaluate(expr)=" << result << "\n"; // 0
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
{
|
|
auto plus = bp17::make_terminal(user::tag_type{});
|
|
auto expr = plus(user::number{13}, 1);
|
|
|
|
{
|
|
user::number result = expr;
|
|
std::cout << "expr=" << result.value << "\n"; // 42
|
|
}
|
|
}
|
|
|
|
{
|
|
term<user::tag_type> plus = {{user::tag_type{}}};
|
|
bp17::expression<
|
|
bp17::expr_kind::call,
|
|
term<user::tag_type>,
|
|
term<int>,
|
|
term<int>
|
|
> expr = plus(0, 1);
|
|
|
|
{
|
|
user::number result = expr;
|
|
std::cout << "expr=" << result.value << "\n"; // 0
|
|
}
|
|
}
|
|
}
|
|
|
|
std::cout << "\n";
|
|
}
|
|
|
|
namespace reference_returning {
|
|
|
|
struct number
|
|
{
|
|
double value;
|
|
};
|
|
|
|
number const the_result{13.0};
|
|
|
|
// User-defined binary-plus! With weird reference semantics!
|
|
template <typename A, typename B>
|
|
inline number const & eval_plus (A a, B b)
|
|
{ return the_result; }
|
|
|
|
}
|
|
|
|
void reference_returns ()
|
|
{
|
|
term<reference_returning::number> unity = {{1.0}};
|
|
auto expr = unity + reference_returning::number{1.0};
|
|
|
|
// TODO: This has to fail due to the general implicit declaration rules
|
|
// (see [conv] 3-6). This needs to be noted in docs.
|
|
#if 0
|
|
{
|
|
reference_returning::number const & n = expr;
|
|
if (&n == &reference_returning::the_result)
|
|
std::cout << "Got the_result.\n";
|
|
else
|
|
std::cout << "FAIL\n";
|
|
}
|
|
#endif
|
|
|
|
{
|
|
reference_returning::number const & n = evaluate(expr);
|
|
if (&n == &reference_returning::the_result)
|
|
std::cout << "Got the_result.\n";
|
|
else
|
|
std::cout << "FAIL\n";
|
|
}
|
|
|
|
static_assert(
|
|
std::is_same_v<
|
|
decltype(evaluate(expr)),
|
|
reference_returning::number const &
|
|
>
|
|
);
|
|
}
|
|
|
|
int main ()
|
|
{
|
|
term_plus_x();
|
|
term_plus_x_this_ref_overloads();
|
|
term_plus_term();
|
|
term_plus_expr();
|
|
placeholders();
|
|
|
|
const_term_expr();
|
|
|
|
print();
|
|
|
|
default_eval();
|
|
user_eval_expression_as();
|
|
user_operator_eval();
|
|
|
|
placeholder_eval();
|
|
|
|
call_expr();
|
|
|
|
reference_returns();
|
|
|
|
#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
|
|
}
|