Ting-Yu Lin
db551c4afc
All the `operator==` converted was implemented via comparing all the member variables, so they can be implemented using `=default`. Drop the inaccurate comment for `nsStyleImageLayers::Layers::operator==` since the `mImage` was compared using plain `==`. This patch doesn't change behavior. Differential Revision: https://phabricator.services.mozilla.com/D319376
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsStyleAutoArray_h_
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#define nsStyleAutoArray_h_
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#include "mozilla/Assertions.h"
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#include "nsTArray.h"
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/**
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* An array of objects, similar to AutoTArray<T,1> but which is memmovable. It
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* always has length >= 1.
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*/
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template <typename T>
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class nsStyleAutoArray {
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public:
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// This constructor places a single element in mFirstElement.
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enum WithSingleInitialElement { WITH_SINGLE_INITIAL_ELEMENT };
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explicit nsStyleAutoArray(WithSingleInitialElement) {}
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nsStyleAutoArray(const nsStyleAutoArray&) = delete;
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nsStyleAutoArray& operator=(const nsStyleAutoArray&) = delete;
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nsStyleAutoArray(nsStyleAutoArray&&) = default;
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nsStyleAutoArray& operator=(nsStyleAutoArray&&) = default;
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bool Assign(const nsStyleAutoArray& aOther, mozilla::fallible_t) {
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mFirstElement = aOther.mFirstElement;
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return mOtherElements.Assign(aOther.mOtherElements, mozilla::fallible);
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}
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nsStyleAutoArray Clone() const {
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nsStyleAutoArray res(WITH_SINGLE_INITIAL_ELEMENT);
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res.mFirstElement = mFirstElement;
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res.mOtherElements = mOtherElements.Clone();
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return res;
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}
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bool operator==(const nsStyleAutoArray&) const = default;
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size_t Length() const { return mOtherElements.Length() + 1; }
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const T& operator[](size_t aIndex) const {
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return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
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}
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T& operator[](size_t aIndex) {
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return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
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}
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void EnsureLengthAtLeast(size_t aMinLen) {
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if (aMinLen > 0) {
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mOtherElements.EnsureLengthAtLeast(aMinLen - 1);
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}
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}
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void SetLengthNonZero(size_t aNewLen) {
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MOZ_ASSERT(aNewLen > 0);
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mOtherElements.SetLength(aNewLen - 1);
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}
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void TruncateLengthNonZero(size_t aNewLen) {
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MOZ_ASSERT(aNewLen > 0);
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MOZ_ASSERT(aNewLen <= Length());
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mOtherElements.TruncateLength(aNewLen - 1);
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}
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private:
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T mFirstElement;
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nsTArray<T> mOtherElements;
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};
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#endif /* nsStyleAutoArray_h_ */
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