void operator() (binary_node<Tag> const& x) const
{
if (x.type() != tags::mult::str() && x.type() != tags::div::str())
{
str_ += "(";
}
boost::apply_visitor(expression_string(str_),x.left);
str_ += x.type();
boost::apply_visitor(expression_string(str_),x.right);
if (x.type() != tags::mult::str() && x.type() != tags::div::str())
{
str_ += ")";
}
}
void operator() (unary_node<Tag> const& x) const
{
str_ += Tag::str();
str_ += "(";
boost::apply_visitor(expression_string(str_),x.expr);
str_ += ")";
}
void operator() (regex_match_node const & x) const
{
// TODO - replace with pre ICU 4.2 compatible fromUTF32()
#if (U_ICU_VERSION_MAJOR_NUM >= 4) && (U_ICU_VERSION_MINOR_NUM >=2)
boost::apply_visitor(expression_string(str_),x.expr);
str_ +=".match('";
std::string utf8;
UnicodeString ustr = UnicodeString::fromUTF32( &x.pattern.str()[0] ,x.pattern.str().length());
to_utf8(ustr,utf8);
str_ += utf8;
str_ +="')";
#endif
}
void operator() (regex_match_node const & x) const
{
boost::apply_visitor(expression_string(str_),x.expr);
str_ +=".match('";
#if defined(BOOST_REGEX_HAS_ICU)
std::string utf8;
UnicodeString ustr = UnicodeString::fromUTF32( &x.pattern.str()[0] ,x.pattern.str().length());
to_utf8(ustr,utf8);
str_ += utf8;
#else
str_ += x.pattern.str();
#endif
str_ +="')";
}
void operator() (regex_replace_node const & x) const
{
boost::apply_visitor(expression_string(str_),x.expr);
str_ +=".replace(";
str_ += "'";
#if defined(BOOST_REGEX_HAS_ICU)
std::string utf8;
mapnik::value_unicode_string ustr = mapnik::value_unicode_string::fromUTF32( &x.pattern.str()[0] ,x.pattern.str().length());
to_utf8(ustr,utf8);
str_ += utf8;
str_ +="','";
to_utf8(x.format ,utf8);
str_ += utf8;
#else
str_ += x.pattern.str();
str_ +="','";
str_ += x.format;
#endif
str_ +="')";
}