public object visitAssignExpr(Expr.Assign expr)
{
var value = evaluate(expr.value);
if (locals.ContainsKey(expr))
{
environment.assignAt(locals[expr], expr.name, value);
}
else
{
globals.assign(expr.name, value);
}
return(value);
}
public 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}'.");
}
