2008-10-11 Hackage status with GHC 6.10
lemming at henning-thielemann.de
Thu Oct 16 10:58:53 EDT 2008
On Wed, 15 Oct 2008, Duncan Coutts wrote:
> On Wed, 2008-10-15 at 20:47 +0200, Henning Thielemann wrote:
>> I found it just confusing to switch on two features (namely 'optimization
>> including application of rules' and 'parsing, checking and storing new
>> rules') with one option (namely -O). It remains confusing for me also if
>> one of the two features can be enabled separately with
>> -fno-omit-interface-pragmas, but the other feature cannot. Also the option
>> sounds like it also applies not only to RULES. I also find the doubled
>> negation in 'no omit' confusing. What about
>> What concerns documentation: The description of an option for enabling
>> parsing of RULES I would expect in ghc-doc/users_guide/rewrite-rules.html.
> While it used to be more complex, the situation now is quite simple:
> RULES are always parsed (no flags or language extensions needed). They
> also go into the .hi files (unless you use the obscure option to change
> that), so they are exported for all client modules.
So they are handled like all pragmas. That sounds fine to me.
> RULES get used/applied with -O. Again, there is an option to turn off
> the use of rules (without affecting other optimisations).
> This seems pretty sane and easy to explain.
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