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e575ee4462
There was a small mishmash of argument order, as seen on the table:
| Traits<T>::equals(U, T) | Traits<T>::equals(T, U)
============= | ======================= | =======================
uses equals() | HashMap | Vector, HashTable
defines equals() | *String[^1] | ByteBuffer
[^1]: String, DeprecatedString, their Fly-type equivalents and KString.
This mostly meant that you couldn't use a StringView for finding a value
in Vector<String>.
I'm changing the order of arguments to make the trait type itself first
(`Traits<T>::equals(T, U)`), as I think it's more expected and makes us
more consistent with the rest of the functions that put the stored type
first (like StringUtils functions and binary_serach). I've also renamed
the variable name "other" in find functions to "entry" to give more
importance to the value.
With this change, each of the following lines will now compile
successfully:
Vector<String>().contains_slow("WHF!"sv);
HashTable<String>().contains("WHF!"sv);
HashMap<ByteBuffer, int>().contains("WHF!"sv.bytes());
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Concepts.h>
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#include <AK/Traits.h>
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#include <AK/Types.h>
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namespace AK {
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename TUnaryPredicate>
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[[nodiscard]] constexpr TIterator find_if(TIterator first, TEndIterator last, TUnaryPredicate&& pred)
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{
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for (; first != last; ++first) {
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if (pred(*first)) {
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return first;
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}
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}
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return last;
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}
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename T>
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[[nodiscard]] constexpr TIterator find(TIterator first, TEndIterator last, T const& value)
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{
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// FIXME: Use the iterator's trait type, and swap arguments in equals call.
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return find_if(first, last, [&](auto const& v) { return Traits<T>::equals(value, v); });
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}
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template<typename TEndIterator, IteratorPairWith<TEndIterator> TIterator, typename T>
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[[nodiscard]] constexpr size_t find_index(TIterator first, TEndIterator last, T const& value)
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requires(requires(TIterator it) { it.index(); })
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{
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// FIXME: Use the iterator's trait type, and swap arguments in equals call.
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return find_if(first, last, [&](auto const& v) { return Traits<T>::equals(value, v); }).index();
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}
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}
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