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PING Re: [RFA 0/3] Allow the user to define default leading args for commands and aliases


ping ?

Thanks

Philippe

On Tue, 2019-06-25 at 01:11 +0200, Philippe Waroquiers wrote:
> Allow the user to define default leading args for commands and aliases.
> 
> This patch series implements, tests and documents the following commands:
> 
>   set leading-args COMMAND [= LEADING-ARGS...]
>   show leading-args [COMMAND]
>   set enable-leading-args [on|off]
>   show enable-leading-args
> 
> 
> It also changes the alias command to be:
>   alias [-a] [--] ALIAS = COMMAND [= LEADING-ARGS...]
> 
> 
> Using the above leading-args commands and arguments, you can
> define default arguments for commands or define powerful aliases.
> 
> For example:
> 
>   alias bt_ALL = backtrace = -entry-values both -frame-arg all -past-main -past-entry -full
> 
> defines the alias bt_ALL that will give as much information as possible
> in a backtrace.
> 
> Leading args can usefully be combined with the (soon to be pushed I hope)
> 'with' command, such as:
> 
> Make "wLapPeu" an alias of 2 nested "with":
>   alias wLapPeu = with = language pascal -- with print elements unlimited --
> 
> or have an alias pp10 to pretty print an expression with a maximum of
> 10 elements:
> 
>   alias pp10 = with = print pretty -- with print elem 10 -- print
> 
> 
> This patch series also adds a completer for 'alias'.
> 
> 
> Note 1: a preliminary version of this idea (using a command called
> 'add-args' was discussed in
> https://sourceware.org/ml/gdb-patches/2019-06/msg00395.html
> where Tom suggested to make it more GDB like, using 'set' command.
> 
> Note 2: I have made the '=' character mandatory in the 'set leading-args'
> command to be sure to unambiguously separate the COMMAND from the
> specified leading args.
> 
> Also, an '=' character must be specified in the alias command before
> the LEADING-ARGS for consistency with set leading-args.
> This also ensures that the user cannot type a wrong command name
> that would be interpreted as leading args and/or cause 'mismatch'
> of length between ALIAS and COMMAND
> (see https://sourceware.org/ml/gdb-patches/2019-06/msg00459.html
> [RFA] Fix alias command not detecting non matching prefix & sometimes asserting.).
> 
> 


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