[kelbt-users] [feature proposal] autocommit mode

[Elijah Epifanov]

2009/1/23 Adrian Thurston <thurston at complang.org>:
> So let me see if I understand ... autocommit would cause all alternative
> parses to be discarded on every reduction, with the option to disable it
> on specific reductions? This would make Kelbt behave like standard Yacc
> by default, with the kelbt behaviour turned on only where needed?

exactly, like any ordinary lalr parser

>
> -Adrian
>
> Elijah Epifanov wrote:
>> There's no need to delay commit when parsing an unambiguous language,
>> therefore every rule will need (if efficiency is of concern) to commit
>> after reduce.
>>
>> It would be convenient to set an auto-commit mode on on per-grammar
>> basis and (rarely, if at all) disable it for specific portions when
>> needed.
>>
>> %%
>> # Second level supports multiplication.
>> F: tok_number tok_mult F commit try { ... };
>> F: tok_number commit try { ... );
>> };
>> %%
>> ->
>> %%
>> autocommit;
>>
>> # Second level supports multiplication.
>> F: tok_number tok_mult F try { ... };
>> F: tok_number try { ... };
>> %%
>>
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>
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