function b = bayes(o)

% Returns true if the prior object contains Bayesian priors (i.e. at least
% one distribution is specified), false otherwise (ML estimation).
%
% INPUTS
% - o   [dprior]  Prior object.
%
% OUTPUTS
% - b   [logical] True if Bayesian priors are present.

% Copyright © 2026 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare.  If not, see <https://www.gnu.org/licenses/>.

b = ~isempty(o.idbeta) || ~isempty(o.idgamma) || ~isempty(o.idgaussian) || ...
    ~isempty(o.idinvgamma1) || ~isempty(o.iduniform) || ~isempty(o.idinvgamma2) || ...
    ~isempty(o.idweibull);
