[lldb-dev] Xcode 6 Merge: Line Editing

Todd Fiala todd.fiala at gmail.com
Fri Oct 3 20:43:17 PDT 2014


Hey Kate,

Might you be able to put up the patches (say on reviews.llvm.org) a bit
ahead of time and we can maybe have a chance to address any issues on the
Linux side before it goes into top of tree?  Or if reviews.llvm.org is
inconvenient, we could either do an svn branch, or I'd be happy to clone
from a github (or create a github branch you could patch into at
github.com/tfiala/lldb).  Not a big deal either way, but we've hit a number
of hiccups on the non-Apple side with the IOHandler work in the past, and
this might speed up our ability to address any issues ahead of time.

In any event, thanks for the heads up!

-Todd

On Fri, Oct 3, 2014 at 2:17 PM, Kate Stone <katherine_stone at apple.com>
wrote:

> If you’ve used the Xcode 6 Swift REPL you may have noticed a number of
> changes to the way we handle line editing, particularly for text spanning
> multiple lines.  I intend to merge back the relevant line editing changes
> in the next few days and wanted to provide some advance warning that this
> is coming.  This completely replaces editline.h/cpp and makes non-trivial
> changes to IOHandler.h/cpp.  There are also minor changes to the command
> interpreter.  From the original commit log:
>
>     Complete rewrite of interactive editing support for single- and
> multi-line input.
>
>     Improvements include:
>     * Use of libedit's wide character support, which is imperfect but a
> distinct improvement over ASCII-only
>     * Use of "faint” colorization for line prompts
>     * Breaking lines and insert new lines in the middle of a batch by
> simply pressing return
>     * Joining lines with forward and backward character deletion
>     * Detection of paste to suppress automatic formatting and statement
> completion tests
>     * Correctly reformatting when lines grow or shrink to occupy different
> numbers of rows
>     * Saving multi-line history, and correctly preserving the "tip" of
> history during editing
>     * Displaying visible ^C and ^D indications when interrupting input or
> sending EOF
>     * VI support for multi-line editing
>     * General correctness and reliability improvements
>
> The most obvious caveat here is that while these changes have been
> exercised on OS X, it’s certainly possible that we’ll see issues crop up on
> other platforms as a result.
>
> Kate Stone k8stone at apple.com
>  Xcode Runtime Analysis Tools
>
>
> _______________________________________________
> lldb-dev mailing list
> lldb-dev at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>
>


-- 
-Todd
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