#pragma once
/*
* Copyright (C) 2024 Brett Terpstra
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#ifndef BLT_ITERATOR_ITER_COMMON
#define BLT_ITERATOR_ITER_COMMON
#include
#include
namespace blt::iterator
{
template
struct wrapper_base
{
wrapper_base operator++(int)
{
auto tmp = *this;
++*this;
return tmp;
}
wrapper_base operator--(int)
{
static_assert(std::is_same_v ||
std::is_same_v,
"Iterator must allow random access");
auto tmp = *this;
--*this;
return tmp;
}
auto operator[](blt::ptrdiff_t n) const
{
static_assert(std::is_same_v,
"Iterator must allow random access");
return *(*this + n);
}
friend wrapper_base operator+(const wrapper_base& a, blt::ptrdiff_t n)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
auto copy = a;
copy += n;
return copy;
}
friend wrapper_base operator+(blt::ptrdiff_t n, const wrapper_base& a)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
auto copy = a;
copy += n;
return copy;
}
friend wrapper_base operator-(const wrapper_base& a, blt::ptrdiff_t n)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
auto copy = a;
copy -= n;
return copy;
}
friend wrapper_base operator-(blt::ptrdiff_t n, const wrapper_base& a)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
auto copy = a;
copy -= n;
return copy;
}
friend bool operator<(const wrapper_base& a, const wrapper_base& b)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
return b - a > 0;
}
friend bool operator>(const wrapper_base& a, const wrapper_base& b)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
return b < a;
}
friend bool operator>=(const wrapper_base& a, wrapper_base& b)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
return !(a < b); // NOLINT
}
friend bool operator<=(const wrapper_base& a, const wrapper_base& b)
{
static_assert(std::is_same_v,
"Iterator must allow random access");
return !(a > b); // NOLINT
}
friend bool operator==(const wrapper_base& a, const wrapper_base& b)
{
return a.base() == b.base();
}
friend bool operator!=(const wrapper_base& a, const wrapper_base& b)
{
return !(a.base() == b.base()); // NOLINT
}
};
}
#endif //BLT_ITERATOR_ITER_COMMON