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f2686f1332
Add MOZ_CONSTEXPR to the constructors to inform the compiler the constructors can be folded away. Remove protected/private destructors so that static destructors don't have to be registered with static constructors.
50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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 NS_SMILNULLTYPE_H_
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#define NS_SMILNULLTYPE_H_
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#include "mozilla/Attributes.h"
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#include "nsISMILType.h"
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class nsSMILNullType : public nsISMILType
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{
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public:
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// Singleton for nsSMILValue objects to hold onto.
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static nsSMILNullType*
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Singleton()
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{
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static nsSMILNullType sSingleton;
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return &sSingleton;
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}
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protected:
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// nsISMILType Methods
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// -------------------
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virtual void Init(nsSMILValue& aValue) const MOZ_OVERRIDE {}
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virtual void Destroy(nsSMILValue& aValue) const MOZ_OVERRIDE {}
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virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const MOZ_OVERRIDE;
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// The remaining methods should never be called, so although they're very
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// simple they don't need to be inline.
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virtual bool IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const MOZ_OVERRIDE;
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virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const MOZ_OVERRIDE;
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virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const MOZ_OVERRIDE;
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virtual nsresult Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const MOZ_OVERRIDE;
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private:
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// Private constructor: prevent instances beyond my singleton.
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MOZ_CONSTEXPR nsSMILNullType() {}
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};
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#endif // NS_SMILNULLTYPE_H_
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