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classdef myClass
properties
a {mustBeText} = ''
b {mustBeNumeric} = 0
S {mustBeStructWith3NumericFields(S)} = struct('c1',0,'c2',0,'c3',0)
end
end
function mustBeStructWith3NumericFields(var)
if ~isstruct(var)
error("Input must be a struct.")
end
fn = fieldnames(var);
Nfn = length(fn);
if Nfn ~= 3
error("Input struct must have 3 fields.")
end
for j = 1 : Nfn
if ~isnumeric(var.(fn{j}))
error("Input struct fields must be numeric.")
end
end
end
You can run the following to test that your validator function performes its task correctly:
a = myClass;
S = struct('a',1,'b',2,'c',3);
a.S = S;
S = ["a" "b" "c"];
try
a.S = S;
catch ME
fprintf(ME.message + "\n");
end
S = struct('a',1,'b',2,'c',3,'d',4);
try
a.S = S;
catch ME
fprintf(ME.message + "\n");
end
S = struct('a',"1",'b',2,'c',3);
try
a.S = S;
catch ME
fprintf(ME.message + "\n");
end
