Init

cppdraft/counted/iter/access.md

@@ -0,0 +1,42 @@
+[counted.iter.access]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.access)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.access)
+
+#### 24.5.7.3 Accessors [counted.iter.access]
+
+[🔗](#lib:base,counted_iterator)
+
+`constexpr const I& base() const & noexcept;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6063)
+
+*Effects*: Equivalent to: return current;
+
+[🔗](#lib:base,counted_iterator_)
+
+`constexpr I base() &&;
+`
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6074)
+
+*Returns*: std​::​move(current)[.](#2.sentence-1)
+
+[🔗](#lib:count,counted_iterator)
+
+`constexpr iter_difference_t<I> count() const noexcept;
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6085)
+
+*Effects*: Equivalent to: return length;

cppdraft/counted/iter/cmp.md

@@ -0,0 +1,72 @@
+[counted.iter.cmp]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.cmp)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.cmp)
+
+#### 24.5.7.6 Comparisons [counted.iter.cmp]
+
+[🔗](#lib:operator==,counted_iterator)
+
+`template<[common_with](concept.common#concept:common_with "18.4.6 Concept common_­with [concept.common]")<I> I2>
+  friend constexpr bool operator==(
+    const counted_iterator& x, const counted_iterator<I2>& y);
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6362)
+
+*Preconditions*: x and y refer to
+elements of the same sequence ([[counted.iterator]](counted.iterator "24.5.7.1 Class template counted_­iterator"))[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6367)
+
+*Effects*: Equivalent to: return x.length == y.length;
+
+[🔗](#lib:operator==,counted_iterator_)
+
+`friend constexpr bool operator==(
+  const counted_iterator& x, default_sentinel_t) noexcept;
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6379)
+
+*Effects*: Equivalent to: return x.length == 0;
+
+[🔗](#lib:operator%3c=%3e,counted_iterator)
+
+`template<[common_with](concept.common#concept:common_with "18.4.6 Concept common_­with [concept.common]")<I> I2>
+  friend constexpr strong_ordering operator<=>(
+    const counted_iterator& x, const counted_iterator<I2>& y);
+`
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6392)
+
+*Preconditions*: x and y refer to
+elements of the same sequence ([[counted.iterator]](counted.iterator "24.5.7.1 Class template counted_­iterator"))[.](#4.sentence-1)
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6397)
+
+*Effects*: Equivalent to: return y.length <=> x.length;
+
+[6](#6)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6401)
+
+[*Note [1](#note-1)*:
+
+The argument order in the *Effects*: element is reversed
+because length counts down, not up[.](#6.sentence-1)
+
+— *end note*]

cppdraft/counted/iter/const.md

@@ -0,0 +1,58 @@
+[counted.iter.const]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.const)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.const)
+
+#### 24.5.7.2 Constructors and conversions [counted.iter.const]
+
+[🔗](#lib:counted_iterator,constructor)
+
+`constexpr counted_iterator(I i, iter_difference_t<I> n);
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6013)
+
+*Hardened preconditions*: n >= 0 is true[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6017)
+
+*Effects*: Initializes current with std​::​move(i) andlength with n[.](#2.sentence-1)
+
+[🔗](#lib:counted_iterator,constructor_)
+
+`template<class I2>
+  requires [convertible_to](concept.convertible#concept:convertible_to "18.4.4 Concept convertible_­to [concept.convertible]")<const I2&, I>
+    constexpr counted_iterator(const counted_iterator<I2>& x);
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6031)
+
+*Effects*: Initializes current with x.current andlength with x.length[.](#3.sentence-1)
+
+[🔗](#lib:operator=,counted_iterator)
+
+`template<class I2>
+  requires [assignable_from](concept.assignable#concept:assignable_from "18.4.8 Concept assignable_­from [concept.assignable]")<I&, const I2&>
+    constexpr counted_iterator& operator=(const counted_iterator<I2>& x);
+`
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6045)
+
+*Effects*: Assigns x.current to current andx.length to length[.](#4.sentence-1)
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6050)
+
+*Returns*: *this[.](#5.sentence-1)

cppdraft/counted/iter/cust.md

@@ -0,0 +1,49 @@
+[counted.iter.cust]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.cust)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.cust)
+
+#### 24.5.7.7 Customizations [counted.iter.cust]
+
+[🔗](#lib:iter_move,counted_iterator)
+
+`friend constexpr decltype(auto)
+  iter_move(const counted_iterator& i)
+    noexcept(noexcept(ranges::iter_move(i.current)))
+    requires [input_iterator](iterator.concept.input#concept:input_iterator "24.3.4.9 Concept input_­iterator [iterator.concept.input]")<I>;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6419)
+
+*Hardened preconditions*: i.length > 0 is true[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6423)
+
+*Effects*: Equivalent to: return ranges​::​iter_move(i.current);
+
+[🔗](#lib:iter_swap,counted_iterator)
+
+`template<[indirectly_swappable](alg.req.ind.swap#concept:indirectly_swappable "24.3.7.4 Concept indirectly_­swappable [alg.req.ind.swap]")<I> I2>
+  friend constexpr void
+    iter_swap(const counted_iterator& x, const counted_iterator<I2>& y)
+      noexcept(noexcept(ranges::iter_swap(x.current, y.current)));
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6437)
+
+*Hardened preconditions*: Both x.length > 0 and y.length > 0 are true[.](#3.sentence-1)
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6441)
+
+*Effects*: Equivalent to ranges​::​iter_swap(x.current, y.current)[.](#4.sentence-1)

cppdraft/counted/iter/elem.md

@@ -0,0 +1,58 @@
+[counted.iter.elem]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.elem)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.elem)
+
+#### 24.5.7.4 Element access [counted.iter.elem]
+
+[🔗](#lib:operator*,counted_iterator)
+
+`constexpr decltype(auto) operator*();
+constexpr decltype(auto) operator*() const
+  requires [dereferenceable](iterator.synopsis#concept:dereferenceable "24.2 Header <iterator>&nbsp;synopsis [iterator.synopsis]")<const I>;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6100)
+
+*Hardened preconditions*: length > 0 is true[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6104)
+
+*Effects*: Equivalent to: return *current;
+
+[🔗](#lib:operator-%3e,counted_iterator)
+
+`constexpr auto operator->() const noexcept
+  requires [contiguous_iterator](iterator.concept.contiguous#concept:contiguous_iterator "24.3.4.14 Concept contiguous_­iterator [iterator.concept.contiguous]")<I>;
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6116)
+
+*Effects*: Equivalent to: return to_address(current);
+
+[🔗](#lib:operator%5b%5d,counted_iterator)
+
+`constexpr decltype(auto) operator[](iter_difference_t<I> n) const
+  requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6128)
+
+*Hardened preconditions*: n < length is true[.](#4.sentence-1)
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6132)
+
+*Effects*: Equivalent to: return current[n];

cppdraft/counted/iter/nav.md

@@ -0,0 +1,198 @@
+[counted.iter.nav]
+
+# 24 Iterators library [[iterators]](./#iterators)
+
+## 24.5 Iterator adaptors [[predef.iterators]](predef.iterators#counted.iter.nav)
+
+### 24.5.7 Counted iterators [[iterators.counted]](iterators.counted#counted.iter.nav)
+
+#### 24.5.7.5 Navigation [counted.iter.nav]
+
+[🔗](#lib:operator++,counted_iterator)
+
+`constexpr counted_iterator& operator++();
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6145)
+
+*Hardened preconditions*: length > 0 is true[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6149)
+
+*Effects*: Equivalent to:++current;--length;return *this;
+
+[🔗](#lib:operator++,counted_iterator_)
+
+`constexpr decltype(auto) operator++(int);
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6165)
+
+*Hardened preconditions*: length > 0 is true[.](#3.sentence-1)
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6169)
+
+*Effects*: Equivalent to:--length;try { return current++; }catch(...) { ++length; throw; }
+
+[🔗](#lib:operator++,counted_iterator__)
+
+`constexpr counted_iterator operator++(int)
+  requires [forward_iterator](iterator.concept.forward#concept:forward_iterator "24.3.4.11 Concept forward_­iterator [iterator.concept.forward]")<I>;
+`
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6186)
+
+*Effects*: Equivalent to:counted_iterator tmp = *this;++*this;return tmp;
+
+[🔗](#lib:operator--,counted_iterator)
+
+`constexpr counted_iterator& operator--()
+  requires [bidirectional_iterator](iterator.concept.bidir#concept:bidirectional_iterator "24.3.4.12 Concept bidirectional_­iterator [iterator.concept.bidir]")<I>;
+`
+
+[6](#6)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6203)
+
+*Effects*: Equivalent to:--current;++length;return *this;
+
+[🔗](#lib:operator--,counted_iterator_)
+
+`constexpr counted_iterator operator--(int)
+  requires [bidirectional_iterator](iterator.concept.bidir#concept:bidirectional_iterator "24.3.4.12 Concept bidirectional_­iterator [iterator.concept.bidir]")<I>;
+`
+
+[7](#7)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6220)
+
+*Effects*: Equivalent to:counted_iterator tmp = *this;--*this;return tmp;
+
+[🔗](#lib:operator+,counted_iterator)
+
+`constexpr counted_iterator operator+(iter_difference_t<I> n) const
+  requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[8](#8)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6237)
+
+*Effects*: Equivalent to: return counted_iterator(current + n, length - n);
+
+[🔗](#lib:operator+,counted_iterator_)
+
+`friend constexpr counted_iterator operator+(
+  iter_difference_t<I> n, const counted_iterator& x)
+    requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[9](#9)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6250)
+
+*Effects*: Equivalent to: return x + n;
+
+[🔗](#lib:operator+=,counted_iterator)
+
+`constexpr counted_iterator& operator+=(iter_difference_t<I> n)
+  requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[10](#10)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6262)
+
+*Hardened preconditions*: n <= length is true[.](#10.sentence-1)
+
+[11](#11)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6266)
+
+*Effects*: Equivalent to:current += n;
+length -= n;return *this;
+
+[🔗](#lib:operator-,counted_iterator)
+
+`constexpr counted_iterator operator-(iter_difference_t<I> n) const
+  requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[12](#12)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6283)
+
+*Effects*: Equivalent to: return counted_iterator(current - n, length + n);
+
+[🔗](#lib:operator-,counted_iterator_)
+
+`template<[common_with](concept.common#concept:common_with "18.4.6 Concept common_­with [concept.common]")<I> I2>
+  friend constexpr iter_difference_t<I2> operator-(
+    const counted_iterator& x, const counted_iterator<I2>& y);
+`
+
+[13](#13)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6296)
+
+*Preconditions*: x and y refer to elements of the same
+sequence ([[counted.iterator]](counted.iterator "24.5.7.1 Class template counted_­iterator"))[.](#13.sentence-1)
+
+[14](#14)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6301)
+
+*Effects*: Equivalent to: return y.length - x.length;
+
+[🔗](#lib:operator-,counted_iterator__)
+
+`friend constexpr iter_difference_t<I> operator-(
+  const counted_iterator& x, default_sentinel_t) noexcept;
+`
+
+[15](#15)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6313)
+
+*Effects*: Equivalent to:return -x.length;
+
+[🔗](#lib:operator-,counted_iterator___)
+
+`friend constexpr iter_difference_t<I> operator-(
+  default_sentinel_t, const counted_iterator& y) noexcept;
+`
+
+[16](#16)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6326)
+
+*Effects*: Equivalent to: return y.length;
+
+[🔗](#lib:operator-=,counted_iterator)
+
+`constexpr counted_iterator& operator-=(iter_difference_t<I> n)
+  requires [random_access_iterator](iterator.concept.random.access#concept:random_access_iterator "24.3.4.13 Concept random_­access_­iterator [iterator.concept.random.access]")<I>;
+`
+
+[17](#17)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6338)
+
+*Hardened preconditions*: -n <= length is true[.](#17.sentence-1)
+
+[18](#18)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iterators.tex#L6342)
+
+*Effects*: Equivalent to:current -= n;
+length += n;return *this;