Re: changes to "range"

[John W. Eaton]

The Range class was deprecated in Octave 7 and was recently removed from 
the development sources that will become Octave 9.

I guess this wasn't noticed in some (many?) packages because at some 
point, package maintainers started adding -Wno-deprecated-declarations 
to the compiler flags in package Makefiles.

For Range, the replacement is octave::range<double>.  For this class, we 
decided to not make Range a typedef for range<double> because the 
classes do not have identical behavior.

Now that the functions have been removed, you'll just get "not declared" 
errors with no clues about how to fix things.  But if you go back to 
Octave 7 or 8 and remove teh -Wno-deprecated-declarations flag from 
PKG_CXXFLAGS in the package Makefile, you should get more helpful 
messages pointing to replacements for deprecated functions.  In many 
cases, the changes are probably just that functions have been moved into 
the octave namespace.

See also 
https://octave.discourse.group/t/packages-failing-to-build-after-removing-deprecated-functions/3588

jwe

On 11/18/22 20:58, Doug Stewart wrote:
> With the recent changes to "range"  I now cannot install the control pkg.
> this is the error message i get.
>
> pkg install -forge  control signal
> In file included from __control_helper_functions__.cc:7:
> lti_input_idx.cc: In function ‘octave_value_list 
> F__lti_input_idx__(const octave_value_list&, int)’:
> lti_input_idx.cc:96:5: error: ‘Range’ was not declared in this scope
>     96 |     Range mat_idx (1, idx-offset);
>        |     ^~~~~
> lti_input_idx.cc:97:10: error: expected ‘;’ before ‘opt_idx’
>     97 |     Range opt_idx (idx+1-offset, len);
>        |          ^~~~~~~~
>        |          ;
> lti_input_idx.cc:100:17: error: ‘opt_idx’ was not declared in this scope
>    100 |     retval(1) = opt_idx;
>        |                 ^~~~~~~
> lti_input_idx.cc:101:17: error: ‘mat_idx’ was not declared in this scope
>    101 |     retval(0) = mat_idx;
>
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