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#pragma once
#include <algorithm>
#include <array>
#include <cstddef>
#include <string>
#include <string_view>
#include <type_traits>
#include <lexy/_detail/config.hpp>
#include <lexy/_detail/integer_sequence.hpp>
#include <lexy/dsl/identifier.hpp>
namespace ovdl::detail {
template<std::size_t N, typename CharT>
struct string_literal;
struct _string_literal {
protected:
static constexpr auto _to_string(const auto& input) { return string_literal(input); }
static constexpr auto _concat(const auto&... input) { return string_literal(_to_string(input)...); }
};
template<std::size_t N, typename CharT = char>
struct string_literal : _string_literal {
using value_type = CharT;
using pointer = value_type*;
using const_pointer = const value_type*;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
using traits_type = std::char_traits<value_type>;
static constexpr size_type npos = size_type(-1);
static constexpr auto size = std::integral_constant<std::size_t, N - 1> {};
static constexpr auto length = size;
value_type _data[N];
constexpr string_literal() noexcept = default;
constexpr string_literal(const value_type (&literal)[N]) noexcept {
for (auto i = 0u; i != N; i++)
_data[i] = literal[i];
}
constexpr string_literal(value_type c) noexcept : _data {} {
_data[0] = c;
}
constexpr auto begin() noexcept { return std::begin(_data); }
constexpr auto end() noexcept { return std::end(_data); }
constexpr auto cbegin() const noexcept { return std::cbegin(_data); }
constexpr auto cend() const noexcept { return std::cend(_data); }
constexpr auto rbegin() noexcept { return std::rbegin(_data); }
constexpr auto rend() noexcept { return std::rend(_data); }
constexpr auto crbegin() const noexcept { return std::crbegin(_data); }
constexpr auto crend() const noexcept { return std::crend(_data); }
constexpr auto front() const noexcept { return as_string_view().front(); }
constexpr auto back() const noexcept { return as_string_view().back(); }
constexpr auto at(size_type pos) const { return as_string_view().at(pos); }
constexpr auto operator[](size_type pos) const noexcept { return as_string_view()[pos]; }
constexpr bool empty() const { return as_string_view().empty(); }
template<size_type N2>
constexpr bool operator==(const string_literal<N2, value_type>& other) const {
return as_string_view() == other.as_string_view();
}
constexpr bool starts_with(std::basic_string_view<value_type> sv) const noexcept { return as_string_view().starts_with(sv); }
constexpr bool starts_with(value_type ch) const noexcept { return as_string_view().starts_with(ch); }
constexpr bool starts_with(const value_type* s) const { return as_string_view().starts_with(s); }
template<size_type N2>
constexpr bool starts_with(const string_literal<N2, value_type>& other) const {
return starts_with(other.as_string_view());
}
constexpr bool ends_with(std::basic_string_view<value_type> sv) const noexcept { return as_string_view().ends_with(sv); }
constexpr bool ends_with(value_type ch) const noexcept { return as_string_view().ends_with(ch); }
constexpr bool ends_with(const value_type* s) const { return as_string_view().ends_with(s); }
template<size_type N2>
constexpr bool ends_with(const string_literal<N2, value_type>& other) const {
return ends_with(other.as_string_view());
}
constexpr auto clear() const noexcept {
return string_literal<0, value_type> {};
}
constexpr auto push_back(value_type c) const noexcept {
return *this + string_literal { c };
}
constexpr auto pop_back() const noexcept {
string_literal<N - 1, value_type> result {};
for (auto i = 0u; i != N - 2; i++)
result._data[i] = _data[i];
return result;
}
template<size_type count>
constexpr auto append(value_type ch) const noexcept {
string_literal<N + count, value_type> result {};
for (auto i = 0u; i != N; i++)
result._data[i] = _data[i];
for (auto i = N; i != N + count; i++)
result._data[i] = ch;
return result;
}
template<size_type N2>
constexpr auto append(string_literal<N2, value_type> str) const noexcept {
return *this + str;
}
template<size_type N2>
constexpr auto append(const value_type (&literal)[N2]) const noexcept {
return *this + literal;
}
template<size_type pos = 0, size_type count = npos>
constexpr auto substr() const noexcept {
static_assert(pos <= N, "pos must be less than or equal to N");
constexpr size_type result_size = std::min(count - pos, N - pos);
string_literal<result_size, value_type> result {};
for (size_type i = 0u, i2 = pos; i != result_size; i++, i2++)
result._data[i] = _data[i2];
return result;
}
constexpr auto substr() const noexcept {
return substr<>();
}
constexpr std::string_view substr(size_type pos, size_type count = npos) const noexcept {
return as_string_view().substr(pos, count);
}
constexpr size_type find(std::string_view str, size_type pos = 0) const noexcept {
return as_string_view().find(str, pos);
}
template<size_type N2>
constexpr size_type find(const value_type (&literal)[N2], size_type pos = 0) const noexcept {
return as_string_view().find(literal, pos, N2 - 2);
}
constexpr size_type rfind(std::string_view str, size_type pos = 0) const noexcept {
return as_string_view().rfind(str, pos);
}
template<size_type N2>
constexpr size_type rfind(const value_type (&literal)[N2], size_type pos = 0) const noexcept {
return as_string_view().find(literal, pos, N2 - 2);
}
constexpr int compare(std::string_view str) const noexcept {
return as_string_view().compare(str);
}
template<size_type N2>
constexpr int compare(const value_type (&literal)[N2]) const noexcept {
return as_string_view().compare(0, N, literal, N2 - 2);
}
constexpr operator std::basic_string_view<value_type>() const& { return as_string_view(); }
constexpr operator std::basic_string_view<value_type>() const&& = delete;
constexpr std::basic_string_view<value_type> as_string_view() const& { return std::basic_string_view<value_type>(_data, size() - 1); }
constexpr std::basic_string_view<value_type> as_string_view() const&& = delete;
constexpr operator const value_type*() const& { return c_str(); }
constexpr operator const value_type*() const&& = delete;
constexpr const value_type* c_str() const& { return _data; }
constexpr const value_type* c_str() const&& = delete;
constexpr const value_type* data() const& { return _data; }
constexpr const value_type* data() const&& = delete;
template<size_type N2>
constexpr auto operator+(const string_literal<N2, value_type>& other) const noexcept {
string_literal<N + N2 - 1, value_type> result {};
for (size_type i = 0u; i != N; i++)
result._data[i] = _data[i];
for (size_type i = N - 1, i2 = 0; i2 != N2; i++, i2++)
result._data[i] = other._data[i2];
return result;
}
template<size_type N2>
constexpr auto operator+(const value_type (&rhs)[N2]) const noexcept {
return *this + _to_string(rhs);
}
template<size_type N2>
friend constexpr auto operator+(const value_type (&lhs)[N2], string_literal<N, value_type> rhs) noexcept {
return _to_string(lhs) + rhs;
}
};
template<std::size_t N, typename CharT = char>
string_literal(const CharT (&)[N]) -> string_literal<N, CharT>;
template<typename CharT = char>
string_literal(CharT) -> string_literal<1, CharT>;
template<template<typename C, C... Cs> typename T, string_literal Str, std::size_t... Idx>
auto _to_type_string(lexy::_detail::index_sequence<Idx...>) {
return T<typename decltype(Str)::value_type, Str._data[Idx]...> {};
}
template<template<typename C, C... Cs> typename T, string_literal Str>
using to_type_string = decltype(ovdl::detail::_to_type_string<T, Str>(lexy::_detail::make_index_sequence<decltype(Str)::size()> {}));
}
namespace ovdl::dsl {
template<ovdl::detail::string_literal Str, typename L, typename T, typename... R>
constexpr auto keyword(lexyd::_id<L, T, R...>) {
return ovdl::detail::to_type_string<lexyd::_keyword<lexyd::_id<L, T>>::template get, Str> {};
}
}
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