r31051 -[S02] refine Blobs to simply be immutable Bufs, with similar generic characteristics
Author: lwall Date: 2010-06-02 19:30:34 +0200 (Wed, 02 Jun 2010) New Revision: 31051 Modified: docs/Perl6/Spec/S02-bits.pod Log: [S02] refine Blobs to simply be immutable Bufs, with similar generic characteristics Modified: docs/Perl6/Spec/S02-bits.pod === --- docs/Perl6/Spec/S02-bits.pod2010-06-02 16:51:06 UTC (rev 31050) +++ docs/Perl6/Spec/S02-bits.pod2010-06-02 17:30:34 UTC (rev 31051) @@ -13,8 +13,8 @@ Created: 10 Aug 2004 -Last Modified: 21 May 2010 -Version: 216 +Last Modified: 2 Jun 2010 +Version: 217 This document summarizes Apocalypse 2, which covers small-scale lexical items and typological issues. (These Synopses also contain @@ -666,6 +666,8 @@ Callable Positional Associative +Buf +Blob =item * @@ -915,6 +917,7 @@ NameIs really = +buf1Buf[bit] buf8Buf[uint8] buf16 Buf[uint16] buf32 Buf[uint32] @@ -1258,7 +1261,7 @@ Parcel Arguments in a comma list Slicel Arguments in a semicolon list (or equiv, like Z) Capture Function call arguments (right-hand side of a binding) -BlobAn undifferentiated mass of bits +BlobAn undifferentiated mass of ints, an immutable Buf Instant A point on the continuous atomic timeline DurationThe difference between two Instants HardRoutine A routine that is committed to not changing @@ -1338,6 +1341,12 @@ $duration * 2# ok, a duration twice as long 2 * $duration# same +The CBlob type is like an immutable buffer, and therefore +responds both to array and (some) stringy operations. Note that, +like a CBuf, its size is measured in whatever the base unit is, +which is not always bytes. If you have a Cmy Blob[bit] $blob, +then C$blob.elems returns the number of bits in it. + These types do (at least) the following roles: Class Roles @@ -1361,7 +1370,7 @@ Signature Parcel Positional Capture Positional Associative -BlobStringy +BlobStringy Positional Instant Real DurationReal HardRoutine Routine
Re: r31051 -[S02] refine Blobs to simply be immutable Bufs, with similar generic characteristics
pugs-comm...@feather.perl6.nl wrote: Author: lwall Date: 2010-06-02 19:30:34 +0200 (Wed, 02 Jun 2010) New Revision: 31051 Modified: docs/Perl6/Spec/S02-bits.pod Log: [S02] refine Blobs to simply be immutable Bufs, with similar generic characteristics snip Thank you for this change; it was essentially what I wanted with the Blob type. @@ -666,6 +666,8 @@ Callable Positional Associative +Buf +Blob snip However, I believe a further change is needed. With the above addition, you have both Buf and Blob roles as well as Buf and Blob types. I think you need to make each of those just a role or a type, and then add another named entity which is the counterpart role or type. For example, as you have Stringy as a role with the Str type, maybe you can have Blobby with the Blob. And maybe Buffy with the Buf? The Perl community already seems to like such puns, so why not? Or otherwise clarify what Buf and Blob each are. -- Darren Duncan
Re: r31051 -[S02] refine Blobs to simply be immutable Bufs, with similar generic characteristics
Darren Duncan wrote: With the above addition, you have both Buf and Blob roles as well as Buf and Blob types. I think you need to make each of those just a role or a type, and then add another named entity which is the counterpart role or type. For example, as you have Stringy as a role with the Str type, maybe you can have Blobby with the Blob. And maybe Buffy with the Buf? The Perl community already seems to like such puns, so why not? I second the notion of a separate role, like Str vs. Stringy. However, the idea here is that a Blob is an immutable Buf. AFAICT, the roles are agnostic concerning mutability: you have Positional, which applies to both Arrays and Lists (IIRC). So you'd have one of Blobby or Buffy, but not both. Or perhaps you'd have another name for it that captures the essentials that Blobs abd Bufs share, without privileging one over the other. Or not. -- Jonathan Dataweaver Lang
