// bslalg_typetraitbitwiseequalitycomparable.h -*-C++-*- #ifndef INCLUDED_BSLALG_TYPETRAITBITWISEEQUALITYCOMPARABLE #define INCLUDED_BSLALG_TYPETRAITBITWISEEQUALITYCOMPARABLE #include <bsls_ident.h> BSLS_IDENT("$Id: $") //@PURPOSE: Provide a trait to mark classes as bit-wise eq.-comparable. // //@DEPRECATED: Use 'bslmf_isbitwiseequalitycomparable' instead. // //@CLASSES: // bslalg::TypeTraitBitwiseEqualityComparable: bit-wise eq.-comparable trait // //@SEE_ALSO: // //@DESCRIPTION: This component provides a single traits class, // 'bslalg::TypeTraitBitwiseEqualityComparable', which allows the trait // 'bslmf::IsBitwiseEqualityComparable' to be declared using the (deprecated) // 'BSLALG_DECLARE_NESTED_TRAITS' macro. See the // 'bslmf_isbitwiseequalitycomparable' component for details of this trait. // ///Usage ///----- // No Usage example is provided since this component is deprecated. #include <bslscm_version.h> #include <bslmf_isbitwiseequalitycomparable.h> #include <bslmf_nestedtraitdeclaration.h> namespace BloombergLP { namespace bslalg { //========================================== // struct TypeTraitBitwiseEqualityComparable //========================================== struct TypeTraitBitwiseEqualityComparable { // Objects of a type with this trait can be compared for equality using // 'memcmp'. If two objects compare equal, then 'memcmp' returns 0, // otherwise it returns non-zero. Classes with this traits are assumed to // have no padding and to be bit-wise copyable (see the // 'TypeTraitBitwiseCopyable' trait). Undefined behavior may result if // this trait is assigned to a type that does not have an 'operator==' or // whose 'operator==' implementation may return different from comparing // the footprints with 'memcmp' . template <class TYPE> struct NestedTraitDeclaration : bslmf::NestedTraitDeclaration<TYPE, bslmf::IsBitwiseEqualityComparable> { // This class template ties the // 'bslalg::TypeTraitBitwiseEqualityComparable' trait tag to the // 'bslmf::IsBitwiseEqualityComparable' trait metafunction. }; template <class TYPE> struct Metafunction : bslmf::IsBitwiseEqualityComparable<TYPE>::type { }; }; } // close package namespace #ifndef BDE_OPENSOURCE_PUBLICATION // BACKWARD_COMPATIBILITY // ============================================================================ // BACKWARD COMPATIBILITY // ============================================================================ typedef bslalg::TypeTraitBitwiseEqualityComparable bslalg_TypeTraitBitwiseEqualityComparable; // This alias is defined for backward compatibility. #endif // BDE_OPENSOURCE_PUBLICATION -- BACKWARD_COMPATIBILITY } // close enterprise namespace #endif // ---------------------------------------------------------------------------- // Copyright 2013 Bloomberg Finance L.P. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // ----------------------------- END-OF-FILE ----------------------------------