samer@4: % doreturn - Do an action and then return some other value
samer@4: %
samer@4: % doreturn :: (void=>A), B => B.
samer@4: % doreturn :: (void=>A), B1, ..., BN => B1, ..., BN. 
samer@4: %
samer@4: % This is useful when you need to construct an action expression
samer@4: % using sub actions that return no value.
samer@4: function varargout=doreturn(a,varargin), a(); varargout=varargin;
samer@4: