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Re: PATCH: Merge objc-improvements-branch to mainline
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From: |
Ziemowit Laski |
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Subject: |
Re: PATCH: Merge objc-improvements-branch to mainline |
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Date: |
Thu, 25 Sep 2003 13:58:07 -0700 |
On Thursday, Sep 25, 2003, at 08:35 US/Pacific, Kaelin Colclasure wrote:
On Thursday, September 25, 2003, at 07:56 AM, Jason Merrill wrote:
On Thu, 25 Sep 2003 11:41:33 +0200, Dietmar Planitzer
<dave.pl@ping.at> wrote:
On Thursday, September 25, 2003, at 01:55 AM, Nicolas Roard wrote:
The current macro based exception implementation has at least two
significant disadvantages: (1) it is unsafe and (2) very inefficient
on
RISC CPUs.
Unfortunately, it seems that the implementation being discussed only
solves
#1.
True -- but this is because Apple has a widely deployed installed base
of code which uses the "legacy" library-based exceptions. If they're
ever to change this, it has to happen incrementally. By making the
first generation of compiler-supported exceptions interoperable with
the library (while simultaneously changing the library macros to now
use the compiler support for new code), the necessary preconditions
for eventually replacing uses of the legacy library-based exceptions
are in place.
Yes, exactly. :-)
--Zem
--------------------------------------------------------------
Ziemowit Laski 1 Infinite Loop, MS 301-2K
Mac OS X Compiler Group Cupertino, CA USA 95014-2083
Apple Computer, Inc. +1.408.974.6229 Fax .5477