public override void visit(double_question_node dqn)
{
var st = dqn.Parent;
while (!(st is statement))
{
st = st.Parent;
}
var tname = "#temp" + UniqueNumStr();
var tt = new var_statement(new ident(tname), dqn.left);
tt.var_def.Parent = tt;
var l = new List <statement>();
l.Add(tt);
l.Add(st as statement);
expression right = dqn.right;
var eq = new bin_expr(new ident(tname), new nil_const(), Operators.NotEqual, dqn.left.source_context);
var qce = new question_colon_expression(eq, new ident(tname), right, dqn.source_context);
ReplaceUsingParent(dqn, qce);
visit(qce);
ReplaceStatementUsingParent(st as statement, l);
visit(tt);
}
public virtual void visit(double_question_node _double_question_node)
{
DefaultVisit(_double_question_node);
}
