Walter Bright , dans le message (digitalmars.D:174360), a écrit :
> On 8/6/2012 12:00 PM, Philippe Sigaud wrote:
>> Yes, well we don't have a condition system. And using exceptions
>> during lexing would most probably kill its efficiency.
>> Errors in lexing are not uncommon. The usual D idiom of having an enum
>> StopOnError { no, yes } should be enough.
>
>
> That's why I suggested supplying a callback delegate to decide what to do
> with
> errors (ignore, throw exception, or quit) and have the delegate itself do
> that.
> That way, there is no customization of the Lexer required.
It may be easier to take into accound few cases (return error token and
throwing is enough, so that is a basic static if), than to define a way
to integrate a delegate (what should be the delegate's signature, what
value to return to query for stopping, how to provide ways to recovers,
etc).
