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| [/ | ||
| Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com) | ||
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| Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
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| Official repository: https://github.com/CPPAlliance/url | ||
| ] | ||
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| [section MutableString] | ||
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| A ['MutableString] is a container that has the `assign` and | ||
| `append` member functions that accept iterators to `char`. | ||
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| The class __pct_encoded_view__ provides a operations | ||
| to assign and append percent-decoded values to a | ||
| ['MutableString]. | ||
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| When storing decoded values in a container, these functions | ||
| allow the caller to recycle the input string without | ||
| reallocating memory. | ||
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| [heading Related Identifiers] | ||
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| * __pct_encoded_view__ | ||
| * [link url.ref.boost__urls__pct_encoded_rule `pct_encoded_rule`] | ||
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| [heading Requirements] | ||
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| In this table: | ||
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| * `T` is a type meeting the requirements of ['MutableString] | ||
| * `s` is a mutable container of type `T` | ||
| * `first`, `last` are __InputIterator__s whose `value_type` is `char` | ||
| and which refer to the valid character sequence `[ first, last )` | ||
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| [table Valid expressions | ||
| [[Expression] [Type] [Semantics, Pre/Post-conditions]] | ||
| [ | ||
| [ | ||
| ``` | ||
| T::value_type | ||
| ``` | ||
| ] | ||
| [`char`] | ||
| [ | ||
| Requires: `std::is_same_v< T::value_type, char >` | ||
| ] | ||
| ][ | ||
| [ | ||
| ``` | ||
| s.assign(first,last) | ||
| ``` | ||
| ] | ||
| [] | ||
| [ | ||
| This member function assigns the characters from the | ||
| range in `[first, last)` to `s`. | ||
| ] | ||
| ][ | ||
| [ | ||
| ``` | ||
| s.append(first,last) | ||
| ``` | ||
| ] | ||
| [] | ||
| [ | ||
| This member function appends the characters from the | ||
| range in `[first, last)` to `s`. | ||
| ] | ||
| ]] | ||
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| [heading Exemplar] | ||
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| [snippet_mutable_string_exemplar] | ||
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| [heading Models] | ||
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| * __std_string__ | ||
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| [heading Models] | ||
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| * __pct_encoded_view__ | ||
| * [def __pct_encoded_view__ [link url.ref.boost__urls__pct_encoded_view `pct_encoded_view`]] | ||
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| [endsect] |
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| // | ||
| // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| // | ||
| // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| // | ||
| // Official repository: https://github.com/CPPAlliance/url | ||
| // | ||
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| #ifndef BOOST_URL_IS_MUTABLE_STRING_HPP | ||
| #define BOOST_URL_IS_MUTABLE_STRING_HPP | ||
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| #include <type_traits> | ||
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| namespace boost { | ||
| namespace urls { | ||
| namespace grammar { | ||
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| /** Alias for `std::true_type` if `T` satisfies __MutableString__ | ||
| for the iterator type `I` | ||
| */ | ||
| #ifdef BOOST_URL_DOCS | ||
| template<class T, class I> | ||
| using is_mutable_string = __see_below__; | ||
| #else | ||
| namespace detail | ||
| { | ||
| template<class T, class = void> | ||
| struct has_value_type : std::false_type {}; | ||
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| template<class T> | ||
| struct has_value_type<T, boost::void_t< | ||
| typename T::value_type>> | ||
| : std::true_type | ||
| {}; | ||
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| template<class T, class I, class = void> | ||
| struct has_assign_and_append : std::false_type {}; | ||
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| template<class T, class I> | ||
| struct has_assign_and_append<T, I, boost::void_t< | ||
| // T::append(I, I) | ||
| decltype( | ||
| std::declval<T&>() | ||
| .append( | ||
| std::declval<I>(), | ||
| std::declval<I>()) | ||
| ), | ||
| // T::assign(I, I) | ||
| decltype( | ||
| std::declval<T&>() | ||
| .assign( | ||
| std::declval<I>(), | ||
| std::declval<I>()) | ||
| )>> | ||
| : std::true_type | ||
| {}; | ||
| } | ||
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| template <class T, class I, class = void> | ||
| struct is_mutable_string : std::false_type {}; | ||
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| template <class T, class I> | ||
| struct is_mutable_string< | ||
| T, I, | ||
| typename std::enable_if< | ||
| detail::has_value_type<T>::value && | ||
| detail::has_assign_and_append<T, I>::value | ||
| >::type> | ||
| : std::is_same<typename T::value_type, char> | ||
| {}; | ||
| #endif | ||
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| } // grammar | ||
| } // urls | ||
| } // boost | ||
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| #endif |
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