[RFAv3 1/4] Implement user defined prefix.

[Simon Marchi]

On 2019-11-28 3:08 p.m., Philippe Waroquiers wrote:
> diff --git a/gdb/cli/cli-script.c b/gdb/cli/cli-script.c
> index 06cdcd6bfe..066a596fdc 100644
> --- a/gdb/cli/cli-script.c
> +++ b/gdb/cli/cli-script.c
> @@ -29,6 +29,7 @@
>  #include "cli/cli-cmds.h"
>  #include "cli/cli-decode.h"
>  #include "cli/cli-script.h"
> +#include "cli/cli-style.h"
>  
>  #include "extension.h"
>  #include "interps.h"
> @@ -1395,7 +1396,17 @@ do_define_command (const char *comname, int from_tty,
>        int q;
>  
>        if (c->theclass == class_user || c->theclass == class_alias)
> -	q = query (_("Redefine command \"%s\"? "), c->name);
> +	{
> +	  /* if C is a prefix command that was previously defined,
> +	     tell the user its subcommands will be kept, and ask
> +	     if ok to redefine the command.  */
> +	  if (c->prefixlist != nullptr)
> +	    q = c->user_commands.get () == nullptr
> +	      || query (_("Keeping subcommands of prefix command \"%s\".\n"
> +			  "Redefine command \"%s\"? "), c->name, c->name);

Just a nit here before you push, format the multi-line expression line like this, with
a parenthesis:

	    q = (c->user_commands.get () == nullptr
		 || query (_("Keeping subcommands of prefix command \"%s\".\n"
			     "Redefine command \"%s\"? "), c->name, c->name));

Simon