129 lines
3.3 KiB
C++
129 lines
3.3 KiB
C++
///@file
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//
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// Copyright (C) 2014 Thomas Geymayer <tomgey@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#ifndef SG_NASAL_CONTEXT_HXX_
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#define SG_NASAL_CONTEXT_HXX_
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#include "cppbind_fwd.hxx"
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#include "NasalMe.hxx"
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#include <boost/call_traits.hpp>
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#include <initializer_list>
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namespace nasal
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{
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/**
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* Wraps a nasal ::naContext without taking ownership/managing its lifetime
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*/
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class ContextWrapper
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{
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public:
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explicit ContextWrapper(naContext ctx);
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operator naContext();
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/** Convert to non-const ::naContext for usage with C-APIs */
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naContext c_ctx() const;
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Hash newHash();
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String newString(const char* str);
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/** Raise a nasal runtime error */
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template<class... Args>
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void runtimeError(const char* fmt, Args ... args) const
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{
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naRuntimeError(c_ctx(), fmt, args...);
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}
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template<class T>
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naRef to_nasal(T arg) const
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{
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return nasal::to_nasal(_ctx, arg);
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}
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template<class T, std::size_t N>
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naRef to_nasal(const T(&array)[N]) const
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{
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return nasal::to_nasal(_ctx, array);
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}
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/** Create a nasal vector filled with the given values */
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template<class... Vals>
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naRef to_nasal_vec(Vals ... vals)
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{
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return newVector({to_nasal(vals)...});
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}
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template<class T>
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Me to_me(T arg) const
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{
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return Me{ to_nasal(arg) };
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}
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template<class T>
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typename from_nasal_ptr<T>::return_type
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from_nasal(naRef ref) const
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{
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return (*from_nasal_ptr<T>::get())(_ctx, ref);
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}
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naRef callMethod(Me me, naRef code, std::initializer_list<naRef> args);
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template<class Ret, class... Args>
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Ret callMethod( Me me,
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naRef code,
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typename boost::call_traits<Args>::param_type ... args )
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{
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// TODO warn if with Ret == void something different to nil is returned?
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return from_nasal<Ret>(callMethod(
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me,
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code,
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{ to_nasal<typename boost::call_traits<Args>::param_type>(args)... }
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));
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}
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protected:
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naContext _ctx;
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// Not exposed to avoid confusion of intializer_list<naRef> to variadic
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// arguments
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naRef newVector(std::initializer_list<naRef> vals);
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};
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/**
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* Creates and manages the lifetime of a ::naContext
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*/
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class Context:
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public ContextWrapper
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{
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public:
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Context();
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~Context();
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Context(const Context&) = delete;
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Context& operator=(const Context&) = delete;
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};
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} // namespace nasal
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#include "from_nasal.hxx"
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#include "to_nasal.hxx"
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#endif /* SG_NASAL_CONTEXT_HXX_ */
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