public object visitAssignExpr(Expr.Assign expr)
{
Object value = evaluate(expr.value);
environment.Assign(expr.name, value);
return(value);
}
internal void Assign(Token name, Object value)
{
if (Values.ContainsKey(name.Lexeme))
{
Values[name.Lexeme] = value;
return;
}
if (enclosing != null)
{
enclosing.Assign(name, value);
return;
}
throw new RuntimeError(name, "Undefined variable '" + name.Lexeme + "'");
}