mirror of
https://github.com/Mahdi-zarei/nekoray.git
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daa6c93900
* refactor: migrate from protobuf to simple-protobuf * update go.mod * fix server * Update gRPC.cpp * Update gRPC.cpp
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/***************************************************************************\
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* Name : template concepts *
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* Description : general template concepts used by protobuf de/serializer *
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* Author : antonin.kriz@gmail.com *
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* ------------------------------------------------------------------------- *
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* This is free software; you can redistribute it and/or modify it under the *
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* terms of the MIT license. A copy of the license can be found in the file *
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* "LICENSE" at the root of this distribution. *
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\***************************************************************************/
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#pragma once
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#include <concepts>
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#include <cstddef>
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#include <type_traits>
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namespace spb
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{
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template < class T >
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concept resizable_container = requires( T container ) {
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{ container.data( ) } -> std::same_as< typename std::decay_t< T >::value_type * >;
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{ container.resize( 1 ) };
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typename std::decay_t< T >::value_type;
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{ sizeof( typename std::decay_t< T >::value_type ) == sizeof( char ) };
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};
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template < class T >
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concept size_container = requires( T container ) {
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{ container.data( ) };
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{ container.size( ) } -> std::convertible_to< std::size_t >;
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typename std::decay_t< T >::value_type;
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{ sizeof( typename std::decay_t< T >::value_type ) == sizeof( char ) };
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};
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namespace detail
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{
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template < class T >
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concept proto_enum = std::is_enum_v< T >;
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template < class T >
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concept proto_field_int_or_float = std::is_integral_v< T > || std::is_floating_point_v< T >;
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template < class T >
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concept proto_field_number = proto_enum< T > || proto_field_int_or_float< T >;
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template < class T >
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concept container = requires( T container ) {
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{ container.data( ) } -> std::same_as< typename std::decay_t< T >::value_type * >;
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{ container.size( ) } -> std::convertible_to< std::size_t >;
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{ container.begin( ) };
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{ container.end( ) };
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typename std::decay_t< T >::value_type;
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};
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template < class T >
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concept proto_field_bytes =
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container< T > && std::is_same_v< typename std::decay_t< T >::value_type, std::byte >;
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template < class T >
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concept proto_field_bytes_resizable = proto_field_bytes< T > && requires( T obj ) {
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{ obj.resize( 1 ) };
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{ obj.clear( ) };
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};
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template < class T >
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concept proto_field_string =
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container< T > && std::is_same_v< typename std::decay_t< T >::value_type, char >;
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template < class T >
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concept proto_field_string_resizable = proto_field_string< T > && requires( T obj ) {
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{ obj.append( "1", 1 ) };
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{ obj.clear( ) };
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};
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template < class T >
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concept proto_label_repeated = requires( T container ) {
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{ container.emplace_back( ) };
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{ container.begin( ) };
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{ container.end( ) };
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{ container.clear( ) };
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typename T::value_type;
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} && !proto_field_string< T > && !proto_field_bytes< T >;
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template < class T >
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concept proto_label_optional = requires( T container ) {
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{ container.has_value( ) } -> std::convertible_to< bool >;
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{ container.reset( ) };
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{ *container } -> std::same_as< typename T::value_type & >;
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{ container.emplace( typename T::value_type( ) ) } -> std::same_as< typename T::value_type & >;
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typename T::value_type;
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};
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template < class T >
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concept proto_message = std::is_class_v< T > && !proto_field_string< T > &&
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!proto_field_bytes< T > && !proto_label_repeated< T > && !proto_label_optional< T >;
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}// namespace detail
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}// namespace spb
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