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sus-cmp-fn.max_by_key.html
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<!DOCTYPE html>
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<meta name="description" content="Returns the element that gives the maximum value from the specified function."></meta>
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<a href="#">max_by_key</a>
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<div class="sidebar-pretitle sidebar-text">
function
</div>
<div class="sidebar-title sidebar-text">
<a href="#">max_by_key</a>
</div>
<div class="sidebar-subtitle sidebar-text">
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<div class="function">
<div class="section overview">
<h1 class="section-header">
<span>
Function
</span>
<a class="project-name" href="index.html">Subspace</a>
<span class="namespace-dots">::</span>
<a class="namespace-name" href="namespace.sus.html">sus</a>
<span class="namespace-dots">::</span>
<a class="namespace-name" href="sus-namespace.cmp.html">cmp</a>
<span class="namespace-dots">::</span>
<a class="function-name" href="#">max_by_key</a>
</h1>
<div class="overload-set">
<div class="overload">
<div class="function-signature"><div class="src rightside"><a href="https://github.com/chromium/subspace/blob/main/sus/cmp/ord.h#L264">source</a></div><div class="template">template <class T, class KeyFn, int &... , class Key = std::invoke_result_t<KeyFn &, const std::remove_reference_t<T> &>></div><span class="function-auto">auto</span> <a class="function-name" href="#">max_by_key</a>(T a, T b, KeyFn f) -> T<div class="requires">
<span class="requires-keyword keyword">
requires
</span>
<div class="requires-constraint"><pre class="requires-constraint-line">sus::fn::FnMut<KeyFn, ::sus::fn::NonVoid (const std::remove_reference_t<T> &)></pre></div>
<div class="requires-constraint"><pre class="requires-constraint-line">sus::cmp::Ord<Key></pre></div>
</div></div>
</div>
</div>
<div class="description long">
<p>Returns the element that gives the maximum value from the specified
function.</p>
<p>Returns the second argument if the comparison determines them to be equal.</p>
<p>By default this receives and returns objects by value. To receive and return
references, specify the type parameter, such as:
<code>sus::cmp::max_by_key<i32&>(a, b, k)</code>. Note that if either input is a
temporary object this can return a reference to an object past its lifetime.</p>
</div>
</div>
</div>
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