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/*
* Copyright (c) 2003-2012, 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 expr.h
* @author John Wiegley
*
* @ingroup expr
*/
#ifndef _EXPR_H
#define _EXPR_H
#include "exprbase.h"
#include "value.h"
namespace ledger {
class expr_t : public expr_base_t<value_t>
{
class parser_t;
typedef expr_base_t<value_t> base_type;
public:
struct token_t;
class op_t;
typedef intrusive_ptr<op_t> ptr_op_t;
typedef intrusive_ptr<const op_t> const_ptr_op_t;
friend void intrusive_ptr_add_ref(const op_t * op);
friend void intrusive_ptr_release(const op_t * op);
enum check_expr_kind_t {
EXPR_GENERAL,
EXPR_ASSERTION,
EXPR_CHECK
};
typedef std::pair<expr_t, check_expr_kind_t> check_expr_pair;
typedef std::list<check_expr_pair> check_expr_list;
protected:
ptr_op_t ptr;
public:
expr_t() : base_type() {
TRACE_CTOR(expr_t, "");
}
expr_t(const expr_t& other)
: base_type(other), ptr(other.ptr) {
TRACE_CTOR(expr_t, "copy");
}
expr_t(ptr_op_t _ptr, scope_t * _context = NULL)
: base_type(_context), ptr(_ptr) {
TRACE_CTOR(expr_t, "const ptr_op_t&, scope_t *");
}
expr_t(const string& _str, const parse_flags_t& flags = PARSE_DEFAULT)
: base_type() {
TRACE_CTOR(expr_t, "string, parse_flags_t");
if (! _str.empty())
parse(_str, flags);
}
expr_t(std::istream& in, const parse_flags_t& flags = PARSE_DEFAULT)
: base_type() {
TRACE_CTOR(expr_t, "std::istream&, parse_flags_t");
parse(in, flags);
}
virtual ~expr_t() {
TRACE_DTOR(expr_t);
}
expr_t& operator=(const expr_t& _expr) {
if (this != &_expr) {
base_type::operator=(_expr);
ptr = _expr.ptr;
}
return *this;
}
virtual operator bool() const throw() {
return ptr.get() != NULL;
}
ptr_op_t get_op() throw() {
return ptr;
}
void parse(const string& str, const parse_flags_t& flags = PARSE_DEFAULT) {
std::istringstream stream(str);
return parse(stream, flags, str);
}
virtual void parse(std::istream& in,
const parse_flags_t& flags = PARSE_DEFAULT,
const optional<string>& original_string = none);
virtual void compile(scope_t& scope);
virtual value_t real_calc(scope_t& scope);
bool is_constant() const;
value_t& constant_value();
const value_t& constant_value() const;
bool is_function() const;
func_t& get_function();
virtual string context_to_str() const;
virtual void print(std::ostream& out) const;
virtual void dump(std::ostream& out) const;
#if defined(HAVE_BOOST_SERIALIZATION)
private:
/** Serialization. */
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive& ar, const unsigned int /* version */) {
ar & boost::serialization::base_object<base_type>(*this);
ar & ptr;
}
#endif // HAVE_BOOST_SERIALIZATION
};
/**
* Dealing with expr pointers tucked into value objects.
*/
inline bool is_expr(const value_t& val) {
return val.is_any() && val.as_any().type() == typeid(expr_t::ptr_op_t);
}
inline expr_t::ptr_op_t as_expr(const value_t& val) {
VERIFY(val.is_any());
return val.as_any<expr_t::ptr_op_t>();
}
inline void set_expr(value_t& val, expr_t::ptr_op_t op) {
val.set_any(op);
}
inline value_t expr_value(expr_t::ptr_op_t op) {
value_t temp;
temp.set_any(op);
return temp;
}
class call_scope_t;
value_t source_command(call_scope_t& scope);
} // namespace ledger
#endif // _EXPR_H
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