www.gusucode.com > mbcview 工具箱matlab源码程序 > mbcview/@cgddnode/aliasallowed.m
function pAllowed = aliasallowed(ddnode, pItem) %ALIASALLOWED Return the list of items that item can be an alias of % % PALLOWED = ALIASALLOWED(DD, PITEM) returns the list of pointers to items % that PITEM can be made an alias of. The list is restricted if PITEM is % a variable or constant and is in a formula. % Copyright 2000-2004 The MathWorks, Inc. and Ford Global Technologies, Inc. pAllowed = listptrs(ddnode); if ~pItem.issymvalue % look for item in symvalues mySym = insymval(ddnode, pItem); if ~isempty(mySym) % only allow a change to a similar type of item, i.e. constant to % constant or variable to variable allowed = false(size(pAllowed)); if pItem.isconstant for n=1:length(allowed) if pAllowed(n).isconstant allowed(n) = true; end end else for n=1:length(allowed) if ~pAllowed(n).isconstant allowed(n) = true; end end end end end % Remove self pAllowed = pAllowed(pAllowed~=pItem);