// bslalg_typetraithastrivialdefaultconstructor.h -*-C++-*- #ifndef INCLUDED_BSLALG_TYPETRAITHASTRIVIALDEFAULTCONSTRUCTOR #define INCLUDED_BSLALG_TYPETRAITHASTRIVIALDEFAULTCONSTRUCTOR #include <bsls_ident.h> BSLS_IDENT("$Id: $") //@PURPOSE: Provide a trait to mark classes as having a trivial default ctor. // //@DEPRECATED: Use 'bslmf_istriviallydefaultconstructible' instead. // //@CLASSES: // bslalg::TypeTraitHasTrivialDefaultConstructor: has trivial default ctor // //@SEE_ALSO: // //@DESCRIPTION: This component provides a single traits class, // 'bslalg::TypeTraitHasTrivialDefaultConstructor', which allows the trait // 'bsl::is_trivially_default_constructible' to be declared using the // (deprecated) 'BSLALG_DECLARE_NESTED_TRAITS' macro. See the // 'bslmf_istriviallydefaultconstructible' component for details of this trait. // ///Usage ///----- // No Usage example is provided since this component is deprecated. #include <bslscm_version.h> #include <bslmf_istriviallydefaultconstructible.h> #include <bslmf_nestedtraitdeclaration.h> namespace BloombergLP { namespace bslalg { //============================================= // struct TypeTraitHasTrivialDefaultConstructor //============================================= struct TypeTraitHasTrivialDefaultConstructor { // A 'TYPE' with this trait has a trivial default constructor. Objects of // a type with this trait can be default-initialized by simply writing // zeros into the memory footprint of the object. Although it is possible // for such a type not to be bitwise copyable, undefined behavior may // result if this trait is assigned to such a type. (See the description // of 'TypeTraitBitwiseCopyable'.) template <class TYPE> struct NestedTraitDeclaration : bslmf::NestedTraitDeclaration<TYPE, bsl::is_trivially_default_constructible> { // This class template ties the // 'bslalg::TypeTraitHasTrivialDefaultConstructor' trait tag to the // 'bsl::is_trivially_default_constructible' trait metafunction. }; template <class TYPE> struct Metafunction : bsl::is_trivially_default_constructible<TYPE>::type { }; }; } // close package namespace #ifndef BDE_OPENSOURCE_PUBLICATION // BACKWARD_COMPATIBILITY // ============================================================================ // BACKWARD COMPATIBILITY // ============================================================================ typedef bslalg::TypeTraitHasTrivialDefaultConstructor bslalg_TypeTraitHasTrivialDefaultConstructor; // 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 ----------------------------------