XPathValue lookup(const Scope& scope, const string_type& name) const
{
typename Scope::const_iterator i = scope.find(name);
if(i == scope.end())
return XPathValue(0);
return i->second->value();
} // lookup
// Return the declaration associated with the name n,
// or nullptr if no such name exists.
Expr*
lookup(Name* n) {
Scope* s = current_scope();
while (s) {
auto iter = s->find(n);
if (iter != s->end())
return iter->second;
s = s->parent;
}
return nullptr;
}