Calling class methods after implementing subsasgn

Hi,

I had this idea to write a minimal 'multi-dimensional' hash table.

Basically I was thinking of a way to classify days based on various parameters - but as I write this out - I realise I should probably just use a regular MATLAB table instead.

However, I will ask my question regardless if only to satisfy my curiosity and possibly help others who may have the same question.

How can I call a class' public method after implementing subsasgn/subsref?

It seems trying to call nDimHashTableInstance.size() gets captured by subsasgn. Should I modify subsasgn to redirect the call to the right function? That seems like a clunky solution.

Thanks

classdef nDimHashTable

properties (Access = private)

c = {}

end

methods (Access = public)

function this = nDimHashTable()

this.c = {};

end

function this = clear(this)

this.c = {};

end

function out = size(this)

out = sum(~isempty(this.c), 'all');

end

function this = subsasgn(this, key, value)

if key.type ~= "()"

error('Unrecognized property: %s', key.subs)

end

indices = nDimHashTable.hash(key.subs);

this.c{indices{:}} = value;

end

function out = subsref(this, key)

if key.type ~= "()"

error('Unrecognized property: %s', key.subs)

end

indices = nDimHashTable.hash(key.subs);

out = [this.c{indices{:}}];

end

end

methods (Static)

function out = hash(in)

out = {};

for key = string(in)

if key == ":"

out{end+1} = ':';

else

out{end+1} = mod(hex2dec(rptgen.hash(key)), 1979);

end

end

end

end

end

Answer 1

[Erik Johannes Loo]

It seems the answer to this problem is here:

https://uk.mathworks.com/matlabcentral/answers/16652-overriding-subsref-and-subsasgn-effect-on-private-properties

as well as here:

https://uk.mathworks.com/matlabcentral/answers/98647-how-do-i-use-the-subsref-function-to-behave-as-the-builtin-only-for-a-subset-of-subscripted-referenc