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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.
*/
#include <system.hh>
#include "expr.h"
#include "parser.h"
namespace ledger {
void expr_t::parse(std::istream& in, const parse_flags_t& flags,
const optional<string>& original_string)
{
base_type::parse(in, flags, original_string);
parser_t parser;
ptr = parser.parse(in, flags, original_string);
}
void expr_t::compile(scope_t& scope)
{
if (! compiled && ptr) {
ptr = ptr->compile(scope);
base_type::compile(scope);
}
}
value_t expr_t::real_calc(scope_t& scope)
{
if (ptr) {
ptr_op_t locus;
try {
return ptr->calc(scope, &locus);
}
catch (const std::exception& err) {
if (locus) {
add_error_context(_("While evaluating value expression:"));
add_error_context(op_context(ptr, locus));
if (SHOW_INFO()) {
add_error_context(_("The value expression tree was:"));
std::ostringstream buf;
ptr->dump(buf, 0);
std::istringstream in(buf.str());
std::ostringstream out;
char linebuf[1024];
bool first = true;
while (in.good() && ! in.eof()) {
in.getline(linebuf, 1023);
std::streamsize len = in.gcount();
if (len > 0) {
if (first)
first = false;
else
out << '\n';
out << " " << linebuf;
}
}
add_error_context(out.str());
}
}
throw;
}
}
return NULL_VALUE;
}
bool expr_t::is_constant() const
{
assert(compiled);
return ptr && ptr->is_value();
}
bool expr_t::is_function() const
{
assert(compiled);
return ptr && ptr->is_function();
}
value_t& expr_t::constant_value()
{
assert(is_constant());
return ptr->as_value_lval();
}
const value_t& expr_t::constant_value() const
{
assert(is_constant());
return ptr->as_value();
}
expr_t::func_t& expr_t::get_function()
{
assert(is_function());
return ptr->as_function_lval();
}
string expr_t::context_to_str() const
{
return ptr ? op_context(ptr) : _("<empty expression>");
}
void expr_t::print(std::ostream& out) const
{
if (ptr)
ptr->print(out);
}
void expr_t::dump(std::ostream& out) const
{
if (ptr) ptr->dump(out, 0);
}
} // namespace ledger
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