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978e851a0e
Add the constexpr version of max which is only available in std since c++14. Besides being a logical addition next to the already implemented constexpr version of min, there are actually other files, even in Swift/Basic itself, which re-implement this functionality, such as PrefixMap.h. Once this is implemented here, the functionality can be re-used in those other locations, instead of re-implemented each time.
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
//===--- Algorithm.h - ------------------------------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines helper algorithms, some of which are ported from C++14,
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// which may not be available on all platforms yet.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_ALGORITHM_H
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#define SWIFT_BASIC_ALGORITHM_H
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namespace swift {
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/// Returns the minimum of `a` and `b`, or `a` if they are equivalent.
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template <typename T>
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constexpr const T& min(const T &a, const T &b) {
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return !(b < a) ? a : b;
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}
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/// Returns the maximum of `a` and `b`, or `a` if they are equivalent.
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template <typename T>
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constexpr const T& max(const T &a, const T &b) {
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return (a < b) ? b : a;
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}
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} // end namespace swift
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#endif /* SWIFT_BASIC_ALGORITHM_H */
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