160 lines
4.2 KiB
C++
160 lines
4.2 KiB
C++
/*
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* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @addtogroup expr
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*/
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/**
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* @file interactive.h
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* @author John Wiegley
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*
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* @ingroup expr
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*
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* @brief Brief
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*
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* Long.
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*/
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#ifndef _INTERACTIVE_H
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#define _INTERACTIVE_H
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#include "scope.h"
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namespace ledger {
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/**
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* @brief Brief
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*
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* Long.
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*/
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class interactive_t : public noncopyable
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{
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call_scope_t& args;
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string spec;
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public:
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explicit interactive_t(call_scope_t& _args, const string& _spec = "")
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: args(_args), spec(_spec) {
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TRACE_CTOR(interactive_t, "call_scope_t&, const string&");
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verify_arguments();
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}
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virtual ~interactive_t() {
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TRACE_DTOR(interactive_t);
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}
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void verify_arguments() const;
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bool has(std::size_t index) const {
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if (index < args.size() && ! args[index].is_null())
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return true;
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return false;
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}
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value_t& value_at(std::size_t index) {
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assert(has(index));
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return args[index];
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}
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template <typename T>
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T get(std::size_t index);
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};
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template <>
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inline bool interactive_t::get<bool>(std::size_t index) {
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return value_at(index).to_boolean();
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}
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template <>
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inline int interactive_t::get<int>(std::size_t index) {
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return value_at(index).to_int();
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}
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template <>
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inline long interactive_t::get<long>(std::size_t index) {
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return value_at(index).to_long();
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}
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template <>
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inline amount_t interactive_t::get<amount_t>(std::size_t index) {
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return value_at(index).to_amount();
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}
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template <>
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inline string interactive_t::get<string>(std::size_t index) {
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return value_at(index).to_string();
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}
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template <>
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inline mask_t interactive_t::get<mask_t>(std::size_t index) {
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return value_at(index).to_mask();
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}
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template <>
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inline date_t interactive_t::get<date_t>(std::size_t index) {
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return value_at(index).to_date();
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}
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template <>
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inline datetime_t interactive_t::get<datetime_t>(std::size_t index) {
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return value_at(index).to_datetime();
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}
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template <>
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inline value_t::sequence_t&
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interactive_t::get<value_t::sequence_t&>(std::size_t index) {
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return value_at(index).as_sequence_lval();
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}
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template <>
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inline const value_t::sequence_t&
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interactive_t::get<const value_t::sequence_t&>(std::size_t index) {
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return value_at(index).as_sequence();
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}
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template <typename T>
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class in_context_t : public interactive_t
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{
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T& context;
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public:
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explicit in_context_t(call_scope_t& args, const string& spec)
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: interactive_t(args, spec), context(find_scope<T>(args)) {
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TRACE_CTOR(in_context_t, "call_scope_t&, const string&");
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}
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virtual ~in_context_t() {
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TRACE_DTOR(in_context_t);
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}
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T& operator *() {
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return context;
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}
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T * operator->() {
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return &context;
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}
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};
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string join_args(call_scope_t& args);
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} // namespace ledger
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#endif // _INTERACTIVE_H
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