The coder.screener function identifies calls to functions that are not supported for code generation. It checks both the entry-point function, foo1, and the function foo2 that foo1 calls.

Analyze the MATLAB function foo1 that calls foo2. Put foo1 and foo2 in separate files.

function out = foo1(in)
  out = foo2(in);
  disp(out);
end

function out = foo2(in)
  out = eval(in);
end

coder.screener('foo1')

The code generation readiness report displays a summary of the unsupported MATLAB function calls. The function foo2 calls one unsupported MATLAB function.

In the report, click the Code Structure tab and select the Show MATLAB functions check box.

This tab displays a pie chart showing the relative size of each file and how suitable each file is for code generation. In this case, the report:

• Colors foo1.m green to indicate that it is suitable for code generation.

• Colors foo2.m yellow to indicate that it requires significant changes.

• Assigns foo1.m a code generation readiness score of 4 and foo2.m a score of 3. The score is based on a scale of 1–5. 1 indicates that significant changes are required; 5 indicates that the code generation readiness tool does not detect issues.

• Displays a call tree.

The report Summary tab indicates that foo2.m contains one call to the eval function which code generation does not support. To generate a MEX function for foo2.m, modify the code to make the call to eval extrinsic.

function out = foo2(in)
  coder.extrinsic('eval');
  out = eval(in);
end

Rerun the code generation readiness tool.

coder.screener('foo1')

The report no longer flags that code generation does not support the eval function. When you generate a MEX function for foo1, the code generator dispatches eval to MATLAB for execution. For standalone code generation, it does not generate code for it.

The coder.screener function identifies language features that code generation does not support.

Analyze the MATLAB function call_nested that contains a nested function.

function z = call_nested(A)
z = nested_fun(A);

    function z = nested_fun(A)
        z = A(1);
    end

end

coder.screener('call_nested');

The code generation readiness report indicates that nested functions are not supported for code generation.

The report assigns the code a code readiness score of 3. This score indicates that the code requires significant changes.

Before generating code, you must fix the reported issues.