Re: [RFA] candidates for ambiguous command in upper case

[Yao Qi <qiyaoltc@gmail.com>]

On 17-01-10 17:00:28, Pedro Alves wrote:
> On 01/10/2017 03:28 PM, Simon Marchi wrote:
> > On 2017-01-10 10:19, Jerome Guitton wrote:
> >> Yao Qi (qiyaoltc@gmail.com):
> >>
> >>> IMO, there is nothing wrong.  There is no command starts from "EX".
> >>
> >> This is a bit weird to accept upper-case EXEC-FIL then... isn't it?
> >>
> >> (gdb) exec-fil
> >> No executable file now.
> >> (gdb) EXEC-FIL
> >> No executable file now.
> > 
> > I agree that if GDB accepts commands in upper case, the ambiguous
> > command message should work accordingly.
> 
> Agreed.  I thought that the manual mentioned that gdb accepts
> commands in either case, but I can't find it now.
> 

I don't find gdb accepts commands in either case in the manual, and
I am surprised that gdb does so.  Actually, gdb does so since 1988!

commit 7b4ac7e1ed2c4616bce56d1760807798be87ac9e
Author: gdb-2.4+.aux.coff <gdb@fsf.org>
Date:   Sat Jan 16 04:39:57 1988 +0000

    gdb-2.4+.aux.coff

in lookup_cmd function,

+  /* Find end of command name.  */
+
+  p = *line;
+  while (*p == '-'
+        || (*p >= 'a' && *p <= 'z')
+        || (*p >= 'A' && *p <= 'Z')
+        || (*p >= '1' && *p <= '9'))
+    {
+      if (*p >= 'A' && *p <= 'Z')
+       *p += 'a' - 'A';
+      p++;
+    }

however, I don't see any reason to do so.  At least, we need to be
clear that whether gdb accepts upper case commands or not.

-- 
Yao (齐尧)