Re: [PATCH v4 7/8] GDB: Add a character string limiting option

["Maciej W. Rozycki" <macro@embecosm.com>]

On Wed, 30 Mar 2022, Pedro Alves wrote:

> > Though I'd yet have to figure out how to use the syntax quoted in NEWS in 
> > a meaningful manner, and an artificial program may also be required, 
> > because:
> > 
> > (gdb) print L"foobar"
> > No type named wchar_t.
> > (gdb) print u"foobar"
> > No type named char16_t.
> > (gdb) print U"foobar"
> > No type named char32_t.
> > (gdb) 
> > 
> > though I guess the data types do not actually have to be system-supplied, 
> > and it will be enough if they are reasonably defined.
> 
> It will work without a program if you switch to C++ beforehand, with "set language c++",
> because wchar_t/char16_t/char32_t are built-in types in C++.

 Excellent, and indeed it does the right thing too:

(gdb) set language c++
(gdb) print L"foobar"
$1 = L"foobar"
(gdb) print u"foobar"
$2 = u"foobar"
(gdb) print U"foobar"
$3 = U"foobar"
(gdb) set print characters 4
(gdb) print L"foobar"
$4 = L"foob"...
(gdb) print u"foobar"
$5 = u"foob"...
(gdb) print U"foobar"
$6 = U"foob"...
(gdb) 

exactly as documented.  Thanks for the hint!

  Maciej