bool parse(scanner_t& scanner, skip_t& skip_p) const
{
scanner.save();
if (lhs.parse(scanner, skip_p) ||
rhs.parse(scanner, skip_p))
{
scanner.commit();
return true;
}
scanner.rollback();
return false;
}
bool parse(scanner_t& scanner, skip_t& ) const
{
scanner.save();
const int value = scanner.read();
if (value != -1 &&
traits_type::to_char_type(value) == character)
{
scanner.commit();
return true;
}
scanner.rollback();
return false;
}
bool parse(scanner_t& scanner, skip_t& skip_p) const
{
scanner.save();
const int input = scanner.read();
if (input != -1 &&
traits_type::to_char_type(input) >= small &&
traits_type::to_char_type(input) <= large)
{
scanner.commit();
return true;
}
scanner.rollback();
return false;
}
bool parse(scanner_t& scanner, skip_t& ) const
{
scanner.save();
for (typename string_type::const_iterator itor = literal.begin();
itor != literal.end(); ++itor)
{
const int val = scanner.read();
if (val == -1 ||
traits_type::to_char_type(val) != *itor)
{
scanner.rollback();
return false;
}
}
scanner.commit();
return true;
}