source: distools/ispsem.m @ 23

%ISPSEM Test on pseudo-Euclidean mapping
%
%  N = ISPSEM(W)
%      ISPSEM(W)
%
% INPUT
%  W    input mapping
%
% OUTPUT
%  N    logical value
%
% DESCRIPTION
% Returns true for psem mappings. If no output is required,
% false outputs are turned into errors. This may be used for
% assertion.
%
% SEE ALSO
% PSEM

function n = ispsem(w)

        prtrace(mfilename);
        
        if isa(w,'mapping') & strcmp(w.mapping_file,'psem')
                n = 1;
        else
                n = 0;
        end

        % generate error if input is not a psem mapping
        % AND no output is requested (assertion)

        if nargout == 0 & n == 0
                error([newline '---- psem mapping expected -----'])
        end

return