mlist — Scilab object, matrix oriented typed list definition.
mlist(typ,a1,....an )
mlist
object are very similar to tlist objects.
The only difference concerns the extraction and insertion syntax:
if M
is an mlist, for any index i
which is
not a field name, M(i)
is no more the i
th
field of the list.
The semantic of the extraction and insertion syntax should be given by an overloading functions.
The overloading function for extraction syntax b=a(i1,...,in)
has the following calling sequence: b=%<type_of_a>_e_(i1,...,in,a)
and the syntax
[x1,..,xm]=a(i1,...,in)
has the following calling sequence:
[x1,..,xm]=%<type_of_a>_e_(i1,...,in,a)
The overloading function associated to the insertion syntax
a(i1,...,in)=b
has the following calling sequence:
a=%<type_of_b>_i_<type_of_a>(i1,...,in,b,a)
.
mlist fields must then be designed by their names. They can also be
handled using the getfield
and setfield
functions.
M=mlist(['V','name','value'],['a','b';'c' 'd'],[1 2; 3 4]); //define display function %V_p(M),disp(M.name+':'+string(M.value)),endfunction //define extraction operation function r=%V_e(varargin) M=varargin($) r=mlist(['V','name','value'],M.name(varargin(1:$-1)),M.value(varargin(1:$-1))) endfunction M(2,:) // the second row of M M.value //define insertion operations function M=%V_i_V(varargin) M=varargin($) N=varargin($-1) M.value(varargin(1:$-2))=N.value M.name(varargin(1:$-2))=N.name endfunction M(1,1)=M(2,2) function M=%s_i_V(varargin) //insertion of a regular matrix into a V matrix M=varargin($) N=varargin($-1) M.value(varargin(1:$-2))=N M.name(varargin(1:$-2))=emptystr(N) endfunction M(1,1)=44 //tlist case M=tlist(['V','name','value'],['a','b';'c' 'd'],[1 2; 3 4]); M(2) M(2)='a'+string([1 2;3 4]) M('name')