[m-dev.] Adding standard integer types
pbone at csse.unimelb.edu.au
Fri Sep 19 08:44:40 AEST 2008
On Fri, Sep 19, 2008 at 12:48:32AM +1000, Julien Fischer wrote:
> On Thu, 18 Sep 2008, Paul Bone wrote:
> >On Thu, Sep 18, 2008 at 11:04:19PM +1000, Julien Fischer wrote:
> >>int word sized signed
> >Is this the current 'int' type we already have. Changes to it may break
> Yes, but I'm not proposing any changes to it.
> >>For uints, literals would be as they are for the signed versions
> >>except that would have either `u' or`U' appended. For the fixed size
> >>types something like the following might be used:
> >> 42s8 - signed 8-bit integer with decimal value 42
> >> 42U64 - unsigned 64-bit integer with decimal value 42
> >> 42S32 - signed 32-bit integer with decimal value 42
> >Urgh, that's a little clumbsy,
> It's less clumsy than not providing type-specific integer literals.
> Then you have to use type qualifiers to resolve ambiguities. It
> has the additional advantage that literals that are out of range
> for a specific type can be caught during lexing rather than at
> a later stage.
> >can we infer this information from how
> >the constant is used?
> >If we can infer it 95% of the time why not
> >require this markup in the remaining 5% only?
> Sure, but you still need something to handle that 5%. In a sense it
> shouldn't be that different to how C handles it.
This sounds good.
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