private Expr Assignment()
{
Expr expr = Or();
if (Match(TokenType.EQUAL))
{
Token equals = Previous();
Expr value = Assignment();
if (expr is Expr.Variable)
{
Token name = ((Expr.Variable)expr).Name;
return(new Expr.Assign(name, value));
}
else if (expr is Expr.Get)
{
Expr.Get get = (Expr.Get)expr;
return(new Expr.Set(get.Obj, get.Name, value));
}
Panic(equals, "Invalid assignment target.");
}
return(expr);
}
private Expr Call()
{
Expr expr = Primary();
while (true)
{
if (Match(TokenType.LEFT_PAREN))
{
expr = FinishCall(expr);
}
else if (Match(TokenType.DOT))
{
Token name = Consume(TokenType.IDENTIFIER,
"Expect property name after '.'.");
expr = new Expr.Get(expr, name);
}
else
{
break;
}
}
return(expr);
}
public string VisitGetExpr(Expr.Get expr)
{
throw new NotImplementedException();
}
