Value expression::eval(Value &ret)
{
ValueStack valstack;
String str_oper;
str_oper="oper";
POSITION pos=m_postfix.get_top_position();
for(; pos; pos=m_postfix.get_next(pos)){
const char*s=m_postfix.get(pos);
if(s[0]=='%' || isalpha(s[0]) )
{
//ValueRef vref(getworld()->var_get(s));
valstack.add(getworld()->var_get(s));
}
else if (isdigit(s[0])){
valstack.add()=str_to_real(s);
}
else {
_oper* p;
if(s[0]=='\'')
p=getworld()->oper_get(s+1);
else
p=getworld()->oper_get(str_oper+s);
p->eval(valstack) ;
}
}
ret=valstack.get_last();
valstack.remove();
return ret;
}
