51 lines
1.6 KiB
Matlab
51 lines
1.6 KiB
Matlab
function ast = handle_constant_eqs(ast)
|
|
%function ast = handle_constant_eqs(ast)
|
|
%
|
|
% Code to handle equations of type `X = 0;` in AST. Returns equation(s)
|
|
% removed from AST.
|
|
%
|
|
% INPUTS
|
|
% ast [cell array] JSON representation of abstract syntax tree
|
|
%
|
|
% OUTPUTS
|
|
% ast [cell array] updated JSON representation of abstract syntax tree
|
|
%
|
|
% SPECIAL REQUIREMENTS
|
|
% none
|
|
|
|
% Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
|
|
|
|
if nargin ~= 1
|
|
error('Incorrect number of arguments to function')
|
|
end
|
|
|
|
if isempty(ast) || ~iscell(ast)
|
|
error('ast must be a cell')
|
|
end
|
|
|
|
for i = length(ast):-1:1
|
|
assert(strcmp(ast{i}.AST.node_type, 'BinaryOpNode') && strcmp(ast{i}.AST.op, '='), 'Expecting equation');
|
|
if strcmp(ast{i}.AST.arg2.node_type, 'NumConstNode')
|
|
if ~strcmp(ast{i}.AST.arg1.node_type, 'VariableNode')
|
|
error('At the moment only handling Variable Nodes on LHS')
|
|
end
|
|
ast = ast([1:i-1, i+1:end]);
|
|
end
|
|
end
|
|
end
|