104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/*
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* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
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*
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* The MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#pragma once
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// This file contains various reflection methods that are used to
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// support the wallet, e.g. allow specifying operations by name
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// instead of ID.
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namespace graphene { namespace wallet {
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struct static_variant_map
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{
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flat_map< string, int > name_to_which;
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vector< string > which_to_name;
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};
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namespace impl {
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struct static_variant_map_visitor
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{
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static_variant_map_visitor() {}
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typedef void result_type;
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template< typename T >
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result_type operator()( const T& dummy )
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{
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assert( which == m.which_to_name.size() );
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std::string name = js_name<T>::name();
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m.name_to_which[ name ] = which;
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m.which_to_name.push_back( name );
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}
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static_variant_map m;
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int which;
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};
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template< typename StaticVariant >
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struct from_which_visitor
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{
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typedef StaticVariant result_type;
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template< typename Member > // Member is member of static_variant
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result_type operator()( const Member& dummy )
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{
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Member result;
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from_variant( v, result );
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return result; // converted from StaticVariant to Result automatically due to return type
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}
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const variant& v;
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from_which_visitor( const variant& _v ) : v(_v) {}
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};
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} // namespace impl
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template< typename T >
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T from_which_variant( int which, const variant& v )
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{
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// Parse a variant for a known which()
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T dummy;
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dummy.set_which( which );
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impl::from_which_visitor< T > vtor(v);
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return dummy.visit( vtor );
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}
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template<typename T>
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static_variant_map create_static_variant_map()
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{
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T dummy;
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int n = dummy.count();
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impl::static_variant_map_visitor vtor;
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for( int i=0; i<n; i++ )
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{
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dummy.set_which(i);
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vtor.which = i;
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dummy.visit( vtor );
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}
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return vtor.m;
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}
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} } // namespace graphene::wallet
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