98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
#include <psemek/parser/primitives.hpp>
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#include <psemek/app/default_application_factory.hpp>
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#include <iostream>
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#include <fstream>
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#include <iterator>
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#include <psemek/util/clock.hpp>
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#include <psemek/gfx/obj_parser.hpp>
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template <typename Stream>
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Stream & operator << (Stream & s, std::monostate)
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{
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return s << "()";
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}
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template <typename Stream>
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Stream & operator << (Stream & s, psemek::parser::end_token)
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{
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return s << "(end)";
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}
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template <typename Stream>
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Stream & operator << (Stream & s, psemek::parser::ws_token)
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{
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return s << "(ws)";
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}
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template <typename Stream>
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Stream & operator << (Stream & s, psemek::parser::newline_token)
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{
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return s << "(newline)";
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}
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template <typename Stream, typename T>
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Stream & operator << (Stream & s, std::optional<T> const & x)
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{
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if (x)
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return s << *x;
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return s << "(none)";
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}
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template <typename Stream, typename T>
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Stream & operator << (Stream & s, std::vector<T> const & v)
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{
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s << '[';
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for (std::size_t i = 0; i < v.size(); ++i)
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{
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if (i > 0) s << ", ";
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s << v[i];
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}
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return s << ']';
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}
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template <typename Stream, typename T, std::size_t ... I>
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void print_tuple (Stream & s, T const & t, std::index_sequence<I...>)
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{
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((s << (I == 0 ? "" : ", ") << std::get<I>(t)), ...);
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}
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template <typename Stream, typename ... Ts>
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Stream & operator << (Stream & s, std::tuple<Ts...> const & t)
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{
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s << '(';
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print_tuple(s, t, std::make_index_sequence<sizeof...(Ts)>{});
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return s << ')';
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}
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template <typename Stream, typename T, typename ... Ts>
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Stream & operator << (Stream & s, std::variant<T, Ts...> const & v)
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{
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auto visitor = [&s](auto const & x){ s << x; };
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std::visit(visitor, v);
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return s;
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}
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namespace psemek::app
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{
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std::unique_ptr<application::factory> make_application_factory()
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{
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return default_application_factory({.name = "Parser example"}, [](auto const & ...){
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using namespace psemek::parser;
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auto const p = map(concat(integer<int>, ws, one_of(ch('+'), ch('-')), ws, integer<int>), [](auto const & t){
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auto id = [](auto x){ return x; };
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return std::make_tuple(std::get<0>(t), std::visit(id, std::get<2>(t)), std::get<4>(t));
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});
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std::cout << p.parse("45 + 67") << std::endl;
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return nullptr;
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});
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}
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}
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