64 lines
1.6 KiB
Plaintext
64 lines
1.6 KiB
Plaintext
[/
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/ Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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/
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/ Distributed under the Boost Software License, Version 1.0. (See accompanying
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/ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section:CancellationSlot Cancellation slot requirements]
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A type `X` meets the `CancellationSlot` requirements if it satisfies the
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requirements of `CopyConstructible` (C++Std [copyconstructible]) and
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`Destructible` (C++Std [destructible]), as well as the additional requirements
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listed below.
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In the table below, `x1` and `x2` denote (possibly const) values of type `X`,
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`mx1` denotes an xvalue of type `X`, `H` denotes a type that satisfies
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`CancellationHandler`, `h` denotes an xvalue of type `H`, and `u0` to `uN`
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denote identifiers.
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[table CancellationSlot requirements
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[[expression] [type] [assertion/note[br]pre/post-conditions]]
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[
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[`X u(x1);`]
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[]
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[Shall not exit via an exception.[br]
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[br]
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post: `u == x1`.]
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]
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[
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[`X u(mx1);`]
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[]
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[Shall not exit via an exception.[br]
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[br]
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post: `u` equals the prior value of `mx1`.]
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]
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[
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[`x1 == x2`]
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[`bool`]
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[ Returns `true` only if `x1` and `x2` can be interchanged with identical
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effects.
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[br]
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`operator==` shall be reflexive, symmetric, and transitive, and shall not
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exit via an exception.]
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]
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[
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[`x1 != x2`]
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[`bool`]
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[Same as `!(x1 == x2)`.]
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]
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[
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[`x1.assign(h)`]
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[`H&`]
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[]
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]
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[
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[`x1.emplace<H>(u0, ..., uN)`]
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[`H&`]
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[Requires that `is_constructible<H, decltype(u0), ...,
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decltype(u0)>::value` be true.]
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]
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]
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[endsect]
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