From: Dale Johannesen <dalej@apple.com>
To: Aldy Hernandez <aldyh@redhat.com>
Cc: Dale Johannesen <dalej@apple.com>,
"Joseph S. Myers" <jsm28@cam.ac.uk>, Stan Shebs <shebs@apple.com>,
gcc@gcc.gnu.org
Subject: Re: Target-specific Front-Ends? (Was: front end changes for altivec)
Date: Tue, 27 Nov 2001 14:46:00 -0000 [thread overview]
Message-ID: <82DD5AC8-E388-11D5-9854-003065C86F94@apple.com> (raw)
Message-ID: <20011127144600.6t-piynIQWknYhO6srA8wus19u1nMnc2dGZE2G_mUvw@z> (raw)
In-Reply-To: <m3n117vpt3.fsf@litecycle.cc.andrews.edu>
On Tuesday, November 27, 2001, at 01:58 PM, Aldy Hernandez wrote:
>>>>>> "Joseph" == Joseph S Myers <jsm28@cam.ac.uk> writes:
>
>
>> * With context-sensitive keywords, after "typedef int vector;", is vector
>> a keyword or a typedef?
>
> You can't typedef vector in the altivec specs.
The Moto docs (PIM on the website) give two ways to do it, in 2.2.1 and 2.
2.2.
You're apparently trying to use 2.2.1, where "vector" is a predefined
macro.
Apple/Moto's implementation is based on 2.2.2, where "vector" is a
context-sensitive
keyword. IMO the 2.2.2 way is clearly better, well, less bad anyway; it
does
allow the user to use 'vector' in many other places, as he is supposed to
be able
to do. In particular 'typedef int vector;' works, and AFAIK the STL use of
"vector" also works, although I don't think anybody's exercised it much.
The
PIM doesn't explain things very well, but what happens is that "vector" is
a
keyword only when it's at the beginning of a type specification, and only
when followed by certain other keywords, as listed in the PIM. Thus:
typedef int vector;
vector x; /* int */
vector unsigned int y; /* Altivec vector */
And sure enough it works that way. I think the way the new syntax works,
it is actually unambiguous, although that isn't obvious (Ira eventually
convinced
me :) I further think the context-sensitive keyword implementation does
not break
any standard-conforming use of "vector" as an identifier; it only makes
legal
some constructs that are errors according to the standard. (This does not
mean I think it was a good idea; I don't. But it does work.)
| "Joseph" == Joseph S Myers <jsm28@cam.ac.uk> writes:
|
| * With context-sensitive keywords, after "int vector;", is "(vector)+1"
to
| be interpreted as addition, or a cast (which would seem to parse
according
| to the syntax, but violate constraints)?
Addition. (vector) is not a cast because "vector" does not indicate a
type here,
since it isn't followed by any of the other magic words.
next prev parent reply other threads:[~2001-11-27 14:46 UTC|newest]
Thread overview: 237+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-16 9:10 front end changes for altivec Aldy Hernandez
2001-11-16 9:25 ` Andreas Jaeger
2001-11-26 2:55 ` Andreas Jaeger
2001-11-18 3:56 ` Joseph S. Myers
2001-11-18 4:24 ` Aldy Hernandez
2001-11-18 5:09 ` Joseph S. Myers
2001-11-18 6:10 ` Aldy Hernandez
2001-11-18 7:35 ` Richard Henderson
2001-11-26 19:50 ` Richard Henderson
2001-11-26 18:19 ` Aldy Hernandez
2001-11-18 12:41 ` Aldy Hernandez
2001-11-18 13:38 ` Andreas Jaeger
2001-11-18 15:32 ` Aldy Hernandez
2001-11-18 16:49 ` Bernd Schmidt
2001-11-18 17:06 ` Aldy Hernandez
2001-11-27 8:29 ` Aldy Hernandez
2001-11-27 8:00 ` Bernd Schmidt
2001-11-27 7:55 ` Aldy Hernandez
2001-11-27 7:50 ` Andreas Jaeger
2001-11-19 8:02 ` Richard Henderson
2001-11-19 8:35 ` Aldy Hernandez
2001-11-19 9:19 ` Richard Henderson
2001-11-19 11:51 ` Stan Shebs
2001-11-19 13:41 ` Richard Henderson
2001-11-19 16:13 ` Aldy Hernandez
2001-11-19 17:51 ` Richard Henderson
2001-11-19 19:15 ` Aldy Hernandez
2001-11-19 20:50 ` Richard Henderson
2001-11-27 17:14 ` Richard Henderson
2001-11-27 17:10 ` Aldy Hernandez
2001-11-21 13:08 ` Alexandre Oliva
2001-11-21 13:12 ` Daniel Berlin
2001-11-21 13:29 ` Alexandre Oliva
2001-11-21 13:31 ` Daniel Berlin
2001-11-21 13:41 ` Jack Lloyd
2001-11-28 23:44 ` Jack Lloyd
2001-11-28 23:00 ` Daniel Berlin
2001-11-28 22:34 ` Alexandre Oliva
2001-11-21 13:33 ` Richard Henderson
2001-11-21 13:49 ` Daniel Berlin
2001-11-29 4:45 ` Daniel Berlin
2001-11-28 23:16 ` Richard Henderson
2001-11-28 22:21 ` Daniel Berlin
2001-11-21 13:24 ` Per Bothner
2001-11-28 22:25 ` Per Bothner
2001-11-28 21:07 ` Alexandre Oliva
2001-11-27 17:03 ` Richard Henderson
2001-11-27 16:57 ` Aldy Hernandez
2001-11-27 15:16 ` Richard Henderson
2001-11-27 14:50 ` Stan Shebs
2001-11-19 15:25 ` Aldy Hernandez
2001-11-19 17:46 ` Richard Henderson
2001-11-19 21:39 ` Aldy Hernandez
2001-11-20 1:05 ` Dale Johannesen
2001-11-20 2:23 ` Richard Henderson
2001-11-27 17:45 ` Richard Henderson
2001-11-27 17:40 ` Dale Johannesen
2001-11-20 2:46 ` Richard Henderson
2001-11-20 2:56 ` front end changes for altivec-- conclusion Aldy Hernandez
2001-11-27 18:00 ` Aldy Hernandez
2001-11-27 17:50 ` front end changes for altivec Richard Henderson
2001-11-27 17:24 ` Aldy Hernandez
2001-11-27 17:02 ` Richard Henderson
2001-11-27 16:50 ` Aldy Hernandez
2001-11-27 14:01 ` Richard Henderson
2001-11-27 13:52 ` Aldy Hernandez
2001-11-27 13:40 ` Richard Henderson
2001-11-27 7:24 ` Aldy Hernandez
2001-11-26 17:04 ` Joseph S. Myers
2001-11-26 16:39 ` Aldy Hernandez
2001-11-18 6:40 ` Target-specific Front-Ends? (Was: front end changes for altivec) Ziemowit Laski
2001-11-18 6:33 ` Aldy Hernandez
2001-11-26 18:46 ` Aldy Hernandez
2001-11-18 8:19 ` Stan Shebs
2001-11-18 9:13 ` Ira Ruben
2001-11-18 12:26 ` Aldy Hernandez
2001-11-19 4:45 ` Ira Ruben
2001-11-19 6:04 ` Geoff Keating
2001-11-19 7:28 ` Ira Ruben
2001-11-19 12:04 ` Phil Edwards
2001-11-27 14:58 ` Phil Edwards
2001-11-27 12:47 ` Ira Ruben
2001-11-27 12:10 ` Geoff Keating
2001-11-19 7:50 ` Aldy Hernandez
2001-11-27 13:12 ` Aldy Hernandez
2001-11-27 10:53 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Ira Ruben
2001-11-19 6:26 ` Target-specific Front-Ends? (Was: front end changes for altivec) Ziemowit Laski
2001-11-19 7:53 ` Aldy Hernandez
2001-11-19 7:56 ` Ziemowit Laski
2001-11-27 13:21 ` Ziemowit Laski
2001-11-27 13:13 ` Aldy Hernandez
2001-11-27 12:41 ` Ziemowit Laski
2001-11-27 6:46 ` Aldy Hernandez
2001-11-18 18:51 ` Per Bothner
2001-11-27 9:20 ` Per Bothner
2001-11-18 23:55 ` Stan Shebs
2001-11-19 4:18 ` Ira Ruben
2001-11-19 4:48 ` Per Bothner
2001-11-19 5:28 ` Daniel Berlin
2001-11-27 11:35 ` Daniel Berlin
2001-11-19 6:26 ` Ziemowit Laski
2001-11-20 0:33 ` Per Bothner
2001-11-20 3:16 ` Ziemowit Laski
2001-11-20 6:33 ` Per Bothner
2001-11-27 18:27 ` Per Bothner
2001-11-20 11:05 ` Stan Shebs
2001-11-27 18:35 ` Stan Shebs
2001-11-27 18:06 ` Ziemowit Laski
2001-11-20 3:19 ` Stan Shebs
2001-11-20 5:25 ` Joseph S. Myers
2001-11-27 18:24 ` Joseph S. Myers
2001-11-20 11:27 ` Per Bothner
2001-11-27 19:59 ` Per Bothner
2001-11-20 11:37 ` Mark Mitchell
2001-11-20 17:03 ` Aldy Hernandez
2001-11-20 18:25 ` Mark Mitchell
2001-11-28 9:45 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Mark Mitchell
2001-11-28 7:11 ` Target-specific Front-Ends? (Was: front end changes for altivec) Aldy Hernandez
2001-11-20 19:20 ` Stan Shebs
2001-11-20 20:24 ` Mark Mitchell
2001-11-20 23:47 ` Target-specific Front-Ends? (Was: front end changes for Joe Buck
2001-11-28 12:43 ` Joe Buck
2001-11-28 11:31 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Mark Mitchell
2001-11-20 20:27 ` Target-specific Front-Ends? (Was: front end changes for altivec) Dale Johannesen
2001-11-20 20:38 ` Stan Shebs
2001-11-21 4:47 ` Syd Polk
2001-11-21 12:31 ` Tim Hollebeek
2001-11-28 16:15 ` Tim Hollebeek
2001-11-28 14:12 ` Syd Polk
2001-11-28 11:55 ` Stan Shebs
2001-11-28 11:44 ` Dale Johannesen
2001-11-28 11:19 ` Stan Shebs
2001-11-27 20:40 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Mark Mitchell
2001-11-27 18:09 ` Target-specific Front-Ends? (Was: front end changes for altivec) Stan Shebs
2001-11-27 17:35 ` Per Bothner
2001-11-27 12:34 ` Ziemowit Laski
2001-11-27 11:16 ` Per Bothner
2001-11-27 10:47 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Ira Ruben
2001-11-19 6:19 ` Target-specific Front-Ends? (Was: front end changes for altivec) Ziemowit Laski
2001-11-19 7:13 ` Joseph S. Myers
2001-11-19 7:34 ` Stan Shebs
2001-11-19 8:01 ` Joseph S. Myers
2001-11-19 9:18 ` Aldy Hernandez
2001-11-19 11:23 ` Dale Johannesen [this message]
2001-11-27 14:46 ` Dale Johannesen
2001-11-27 13:56 ` Aldy Hernandez
2001-11-27 13:27 ` Joseph S. Myers
2001-11-27 12:57 ` Stan Shebs
2001-11-19 7:56 ` Ziemowit Laski
2001-11-19 8:31 ` Richard Henderson
2001-11-27 13:44 ` Richard Henderson
2001-11-19 10:23 ` Mark Mitchell
2001-11-19 11:55 ` Target-specific Front-Ends? (Was: front end changes for Joe Buck
2001-11-19 14:03 ` Mark Mitchell
2001-11-19 14:46 ` Joe Buck
2001-11-27 16:13 ` Joe Buck
2001-11-20 0:56 ` Devang Patel
2001-11-27 17:37 ` Devang Patel
2001-11-20 5:17 ` Aldy Hernandez
2001-11-20 11:15 ` Ziemowit Laski
2001-11-20 17:09 ` Aldy Hernandez
2001-11-20 17:26 ` Joe Buck
2001-11-20 17:57 ` Aldy Hernandez
2001-11-20 19:16 ` Neil Booth
2001-11-20 21:10 ` Input Stream Rewriting (Was: Target-specific Front-Ends?) Ziemowit Laski
2001-11-21 0:24 ` Neil Booth
2001-11-21 1:05 ` Ziemowit Laski
2001-11-21 4:38 ` Neil Booth
2001-11-28 13:57 ` Neil Booth
2001-11-28 13:25 ` Ziemowit Laski
2001-11-28 12:45 ` Neil Booth
2001-11-28 12:01 ` Ziemowit Laski
2001-11-28 11:06 ` Target-specific Front-Ends? (Was: front end changes for Neil Booth
2001-11-28 9:16 ` Aldy Hernandez
2001-11-28 9:11 ` Joe Buck
2001-11-20 20:53 ` Ziemowit Laski
2001-11-20 22:08 ` Joe Buck
2001-11-28 12:26 ` Joe Buck
2001-11-20 23:37 ` Per Bothner
2001-11-21 3:14 ` Ziemowit Laski
2001-11-21 12:32 ` David Edelsohn
2001-11-21 12:44 ` Ziemowit Laski
2001-11-28 18:40 ` Ziemowit Laski
2001-11-28 18:29 ` David Edelsohn
2001-11-28 13:36 ` Ziemowit Laski
2001-11-28 12:36 ` Per Bothner
2001-11-28 11:55 ` Ziemowit Laski
2001-11-28 7:33 ` Aldy Hernandez
2001-11-27 19:40 ` Ziemowit Laski
2001-11-20 19:17 ` Devang Patel
2001-11-28 11:09 ` Devang Patel
2001-11-27 18:21 ` Aldy Hernandez
2001-11-27 15:32 ` Mark Mitchell
2001-12-04 0:14 ` Alex Rosenberg
2001-12-04 0:33 ` Mark Mitchell
2001-12-04 11:25 ` Aldy Hernandez
2001-11-27 14:53 ` Joe Buck
2001-11-27 14:36 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Mark Mitchell
2001-11-27 13:19 ` Target-specific Front-Ends? (Was: front end changes for altivec) Ziemowit Laski
2001-11-27 12:44 ` Joseph S. Myers
2001-11-19 8:34 ` Aldy Hernandez
2001-11-19 12:54 ` Stan Shebs
2001-11-19 15:41 ` Aldy Hernandez
2001-11-19 19:08 ` Dale Johannesen
2001-11-19 19:15 ` Aldy Hernandez
2001-11-27 17:10 ` Aldy Hernandez
2001-11-27 17:06 ` Dale Johannesen
2001-11-27 16:56 ` Aldy Hernandez
2001-11-27 15:06 ` Stan Shebs
2001-11-27 13:44 ` Aldy Hernandez
2001-11-19 9:26 ` Bernd Schmidt
2001-11-19 9:53 ` Ziemowit Laski
2001-11-19 10:59 ` Bernd Schmidt
2001-11-19 14:12 ` Ziemowit Laski
2001-11-27 15:37 ` Ziemowit Laski
2001-11-27 14:41 ` Bernd Schmidt
2001-11-27 14:30 ` Ziemowit Laski
2001-11-27 14:13 ` Bernd Schmidt
2001-11-19 9:40 ` Stan Shebs
2001-11-19 11:27 ` Ziemowit Laski
2001-11-27 14:50 ` Ziemowit Laski
2001-11-27 14:20 ` Stan Shebs
2001-11-27 12:24 ` Ziemowit Laski
2001-11-27 9:48 ` Stan Shebs
2001-11-26 23:45 ` Target-specific Front-Ends? (Was: front end changes foraltivec) Ira Ruben
2001-11-26 22:22 ` Target-specific Front-Ends? (Was: front end changes for altivec) Stan Shebs
2001-11-26 18:47 ` Ziemowit Laski
2001-11-26 15:45 ` front end changes for altivec Joseph S. Myers
2001-11-26 2:51 ` Aldy Hernandez
2001-11-18 8:02 Target-specific Front-Ends? (Was: front end changes for altivec) mike stump
2001-11-26 19:52 ` mike stump
[not found] <CB35D7B2-E374-11D5-AE62-0030658361CA@apple.com.suse.lists.egcs>
[not found] ` <m3r8qjvqd1.fsf@litecycle.cc.andrews.edu.suse.lists.egcs>
[not found] ` <p73bshnss5x.fsf@amdsim2.suse.de>
2001-11-19 17:20 ` Aldy Hernandez
2001-11-27 16:58 ` Aldy Hernandez
2001-11-20 4:44 mike stump
2001-11-20 10:10 ` Aldy Hernandez
2001-11-27 18:28 ` Aldy Hernandez
2001-11-27 18:12 ` mike stump
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