[lldb-dev] [Bug 27365] New: [PATCH] Additional commands for multi-line mode

[via lldb-dev]

https://llvm.org/bugs/show_bug.cgi?id=27365

            Bug ID: 27365
           Summary: [PATCH] Additional commands for multi-line mode
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: bawr at hszm.pl
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16220
  --> https://llvm.org/bugs/attachment.cgi?id=16220&action=edit
Editline patch.

This patch makes two small changes to the multi-line debugger mode, aimed at
fixing some usability issues with the Swift REPL, which uses this mode
exclusively.

1. A command (bound to Alt-Enter by default) to immediately execute a buffer,
if possible, as opposed to breaking the current line.

2. Two commands (bound to Alt-Up/Down by default) to immediately move around in
command history, without having to scroll through multiple lines with keyboard
arrows. Because the REPL uses multi-line mode, it's not possible to achieve
this using standard editline bindings.

I don't particularly care about having specific keys bound by default, this can
be done in .editrc, if suitable commands are available in the first place.

Note: The comment in the line-break command states that "the completion test is
allowed to change the input lines when complete", but the command itself makes
no effort to redisplay them if they actually *are* changed.

I've opted to do this in BufferRun, but since I'm not sure about the approach,
I haven't changed any pre-existing commands.

If this needs cleaning up or some follow-up explanation, do ask.

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