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Update any_view.md #21

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90 changes: 48 additions & 42 deletions any_view.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
---
title: "`any_view`"
document: P3411R6
document: P3411R7
date: 2026-05-09
audience: SG9, LEWG
author:
Expand All @@ -18,6 +18,10 @@ toc-depth: 2

# Revision History

## R7

- Constrain default constructor of `iterator` on `forward` iterator category

## R6

- Prevent `reference_converts_from_temporary` when dereferencing
Expand Down Expand Up @@ -1414,7 +1418,9 @@ constexpr @*iterator*@();

:::bq

[3]{.pnum} *Postconditions*: `*this` has no *target iterator object*.
[3]{.pnum} *Constraints*: `Opts & any_view_options::forward` is `any_view_options::forward`

[4]{.pnum} *Postconditions*: `*this` has no *target iterator object*.

:::

Expand All @@ -1424,9 +1430,9 @@ constexpr Ref operator*() const;

:::bq

[4]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[5]{.pnum} *Preconditions*: `*this` has a *target iterator object*.

[5]{.pnum} *Effects*: Equivalent to:
[6]{.pnum} *Effects*: Equivalent to:

```cpp
return static_cast<Ref>(*it);
Expand All @@ -1442,9 +1448,9 @@ constexpr @*iterator*@& operator++();

:::bq

[6]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[7]{.pnum} *Preconditions*: `*this` has a *target iterator object*.

[7]{.pnum} *Effects*: Equivalent to:
[8]{.pnum} *Effects*: Equivalent to:

```cpp
++it;
Expand All @@ -1461,7 +1467,7 @@ constexpr void operator++(int);

:::bq

[8]{.pnum} *Effects*: Equivalent to: `++(*this);`
[9]{.pnum} *Effects*: Equivalent to: `++(*this);`

:::

Expand All @@ -1471,15 +1477,15 @@ constexpr @*iterator*@ operator++(int) requires @*see below*@;

:::bq

[9]{.pnum} *Effects*: Equivalent to:
[10]{.pnum} *Effects*: Equivalent to:

```cpp
auto tmp = *this;
++(*this);
return tmp;
```

[10]{.pnum} *Remarks*: The expression in the requires-clause is equivalent to:
[11]{.pnum} *Remarks*: The expression in the requires-clause is equivalent to:

```cpp
Opts & any_view_options::forward == any_view_options::forward
Expand All @@ -1492,11 +1498,11 @@ constexpr @*iterator*@& operator--();

:::bq

[11]{.pnum} *Constraints*: `Opts & any_view_options::bidirectional` is `any_view_options::bidirectional`
[12]{.pnum} *Constraints*: `Opts & any_view_options::bidirectional` is `any_view_options::bidirectional`

[12]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[13]{.pnum} *Preconditions*: `*this` has a *target iterator object*.

[13]{.pnum} *Effects*: Equivalent to:
[14]{.pnum} *Effects*: Equivalent to:

```cpp
--it;
Expand All @@ -1513,7 +1519,7 @@ constexpr @*iterator*@ operator--(int);

:::bq

[14]{.pnum} *Effects*: Equivalent to:
[15]{.pnum} *Effects*: Equivalent to:

```cpp
auto tmp = *this;
Expand All @@ -1529,11 +1535,11 @@ constexpr @*iterator*@& operator+=(difference_type n);

:::bq

[15]{.pnum} *Constraints*: `Opts & any_view_options::random_access` is `any_view_options::random_access`
[16]{.pnum} *Constraints*: `Opts & any_view_options::random_access` is `any_view_options::random_access`

[16]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[17]{.pnum} *Preconditions*: `*this` has a *target iterator object*.

[17]{.pnum} *Effects*: Equivalent to:
[18]{.pnum} *Effects*: Equivalent to:

```cpp
it += n;
Expand All @@ -1550,7 +1556,7 @@ constexpr @*iterator*@& operator-=(difference_type n);

:::bq

[18]{.pnum} *Effects*: Equivalent to:
[19]{.pnum} *Effects*: Equivalent to:

```cpp
auto tmp = *this;
Expand All @@ -1566,7 +1572,7 @@ constexpr Ref operator[](difference_type n) const;

:::bq

[19]{.pnum} *Effects*: Equivalent to:
[20]{.pnum} *Effects*: Equivalent to:

```cpp
return *((*this) + n);
Expand All @@ -1580,11 +1586,11 @@ constexpr add_pointer_t<Ref> operator->() const;

:::bq

[20]{.pnum} *Constraints*: `Opts & any_view_options::contiguous` is `any_view_options::contiguous`
[21]{.pnum} *Constraints*: `Opts & any_view_options::contiguous` is `any_view_options::contiguous`

[21]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[22]{.pnum} *Preconditions*: `*this` has a *target iterator object*.

[22]{.pnum} *Effects*: Equivalent to:
[23]{.pnum} *Effects*: Equivalent to:

```cpp
return to_address(it);
Expand All @@ -1600,31 +1606,31 @@ friend constexpr bool operator==(const @*iterator*@& x, const @*iterator*@& y);

:::bq

[20]{.pnum} *Constraints*: `Opts & any_view_options::forward` is `any_view_options::forward`
[24]{.pnum} *Constraints*: `Opts & any_view_options::forward` is `any_view_options::forward`

[21]{.pnum} *Effects*:
[25]{.pnum} *Effects*:

- [21.1]{.pnum} If both `x` and `y` have no *target iterator object*, equivalent to:
- [25.1]{.pnum} If both `x` and `y` have no *target iterator object*, equivalent to:

```cpp
return true;
```

- [21.2]{.pnum} Otherwise, if `x` has no *target iterator object* and `y` has a *target iterator object*, or, `x` has a *target iterator object* and `y` has no *target iterator object*, equivalent to:
- [25.2]{.pnum} Otherwise, if `x` has no *target iterator object* and `y` has a *target iterator object*, or, `x` has a *target iterator object* and `y` has no *target iterator object*, equivalent to:

```cpp
return false;
```

- [21.3]{.pnum} Otherwise, let `it1` be an lvalue designating the *target iterator object* of `x`, and `it2` be an lvalue designating the *target iterator object* of `y`.
- [25.3]{.pnum} Otherwise, let `it1` be an lvalue designating the *target iterator object* of `x`, and `it2` be an lvalue designating the *target iterator object* of `y`.

- [21.3.1]{.pnum} If `is_same_v<decltype(it1), decltype(it2)>` is `false`, equivalent to
- [25.3.1]{.pnum} If `is_same_v<decltype(it1), decltype(it2)>` is `false`, equivalent to

```cpp
return false;
```

- [21.3.2]{.pnum} Otherwise, equivalent to
- [25.3.2]{.pnum} Otherwise, equivalent to

```cpp
return it1 == it2;
Expand All @@ -1638,7 +1644,7 @@ friend constexpr bool operator<(const @*iterator*@& x, const @*iterator*@& y);

:::bq

[22]{.pnum} *Effects*: Equivalent to:
[26]{.pnum} *Effects*: Equivalent to:

```cpp
return (x - y) < 0;
Expand All @@ -1652,7 +1658,7 @@ friend constexpr bool operator>(const @*iterator*@& x, const @*iterator*@& y);

:::bq

[23]{.pnum} *Effects*: Equivalent to:
[27]{.pnum} *Effects*: Equivalent to:

```cpp
return (x - y) > 0;
Expand All @@ -1666,7 +1672,7 @@ friend constexpr bool operator<=(const @*iterator*@& x, const @*iterator*@& y);

:::bq

[24]{.pnum} *Effects*: Equivalent to:
[28]{.pnum} *Effects*: Equivalent to:

```cpp
return (x - y) <= 0;
Expand All @@ -1680,7 +1686,7 @@ friend constexpr bool operator>=(const @*iterator*@& x, const @*iterator*@& y);

:::bq

[25]{.pnum} *Effects*: Equivalent to:
[29]{.pnum} *Effects*: Equivalent to:

```cpp
return (x - y) >= 0;
Expand All @@ -1694,7 +1700,7 @@ friend constexpr @*iterator*@ operator+(@*iterator*@ i, difference_type n);

:::bq

[26]{.pnum} *Effects*: Equivalent to:
[30]{.pnum} *Effects*: Equivalent to:

```cpp
auto temp = i;
Expand All @@ -1710,7 +1716,7 @@ friend constexpr @*iterator*@ operator+(difference_type n, @*iterator*@ i);

:::bq

[27]{.pnum} *Effects*: Equivalent to:
[31]{.pnum} *Effects*: Equivalent to:

```cpp
return i + n;
Expand All @@ -1725,7 +1731,7 @@ friend constexpr @*iterator*@ operator-(@*iterator*@ i, difference_type n);

:::bq

[28]{.pnum} *Effects*: Equivalent to:
[32]{.pnum} *Effects*: Equivalent to:

```cpp
auto temp = i;
Expand All @@ -1741,11 +1747,11 @@ friend constexpr difference_type operator-(const @*iterator*@& x, const @*iterat

:::bq

[29]{.pnum} *Constraints*: `Opts & any_view_options::random_access` is `any_view_options::random_access`
[33]{.pnum} *Constraints*: `Opts & any_view_options::random_access` is `any_view_options::random_access`

[30]{.pnum} *Preconditions*: Both `x` and `y` have a *target iterator object*, and the two *target iterator object*s have the same type.
[34]{.pnum} *Preconditions*: Both `x` and `y` have a *target iterator object*, and the two *target iterator object*s have the same type.

[31]{.pnum} *Effects*: Equivalent to:
[35]{.pnum} *Effects*: Equivalent to:

```cpp
return it1 - it2;
Expand All @@ -1761,15 +1767,15 @@ friend constexpr RValueRef iter_move(const @*iterator*@ &iter);

:::bq

[32]{.pnum} *Preconditions*: `*this` has a *target iterator object*.
[36]{.pnum} *Preconditions*: `iter` has a *target iterator object*.

[33]{.pnum} *Effects*: Equivalent to:
[37]{.pnum} *Effects*: Equivalent to:

```cpp
return static_cast<RValueRef>(ranges::iter_move(it));
```

where `it` is an lvalue designating the *target iterator object* of `*this`
where `it` is an lvalue designating the *target iterator object* of `iter`

:::

Expand Down Expand Up @@ -1812,7 +1818,7 @@ friend constexpr bool operator==(const @*iterator*@& x, const @*sentinel*@& y);

[2]{.pnum} *Effects*:

- [2.1]{.pnum} If either `x` has no *target iterator object*, or `y` has a *target sentinel object*, equivalent to:
- [2.1]{.pnum} If either `x` has no *target iterator object*, or `y` has no *target sentinel object*, equivalent to:

@patrickroberts patrickroberts Jun 10, 2026

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And fixed the wording in effects for friend constexpr bool operator==(const iterator&, const sentinel&);, which I also assumed was just a typo.


```cpp
return false;
Expand Down
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