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/*
* Copyright (c) 2003-2010, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @addtogroup expr
*/
/**
* @file interactive.h
* @author John Wiegley
*
* @ingroup expr
*/
#ifndef _INTERACTIVE_H
#define _INTERACTIVE_H
#include "scope.h"
namespace ledger {
class interactive_t : public noncopyable
{
call_scope_t& args;
string spec;
public:
explicit interactive_t(call_scope_t& _args, const string& _spec = "")
: args(_args), spec(_spec) {
TRACE_CTOR(interactive_t, "call_scope_t&, const string&");
verify_arguments();
}
virtual ~interactive_t() {
TRACE_DTOR(interactive_t);
}
void verify_arguments() const;
bool has(std::size_t index) const {
if (index < args.size() && ! args[index].is_null())
return true;
return false;
}
value_t& value_at(std::size_t index) {
assert(has(index));
return args[index];
}
template <typename T>
T get(std::size_t index);
};
template <>
inline bool interactive_t::get<bool>(std::size_t index) {
return value_at(index).to_boolean();
}
template <>
inline int interactive_t::get<int>(std::size_t index) {
return value_at(index).to_int();
}
template <>
inline long interactive_t::get<long>(std::size_t index) {
return value_at(index).to_long();
}
template <>
inline amount_t interactive_t::get<amount_t>(std::size_t index) {
return value_at(index).to_amount();
}
template <>
inline string interactive_t::get<string>(std::size_t index) {
return value_at(index).to_string();
}
template <>
inline mask_t interactive_t::get<mask_t>(std::size_t index) {
return value_at(index).to_mask();
}
template <>
inline date_t interactive_t::get<date_t>(std::size_t index) {
return value_at(index).to_date();
}
template <>
inline datetime_t interactive_t::get<datetime_t>(std::size_t index) {
return value_at(index).to_datetime();
}
template <>
inline value_t::sequence_t&
interactive_t::get<value_t::sequence_t&>(std::size_t index) {
return value_at(index).as_sequence_lval();
}
template <>
inline const value_t::sequence_t&
interactive_t::get<const value_t::sequence_t&>(std::size_t index) {
return value_at(index).as_sequence();
}
template <typename T>
class in_context_t : public interactive_t
{
T& context;
public:
explicit in_context_t(call_scope_t& args, const string& spec)
: interactive_t(args, spec), context(find_scope<T>(args)) {
TRACE_CTOR(in_context_t, "call_scope_t&, const string&");
}
virtual ~in_context_t() {
TRACE_DTOR(in_context_t);
}
T& operator *() {
return context;
}
T * operator->() {
return &context;
}
};
string join_args(call_scope_t& args);
} // namespace ledger
#endif // _INTERACTIVE_H
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