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Nodes of different colours represent the following:
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arrows point from an interface to procedures which implement that interface.
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implementation in a submodule of an interface in a parent module.
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program simpleuse fordebug,only:debug,debug_locimplicit none type(debug)::errprint*," "print*,"Running simple example..."! Info: starting a numerical solvecall err%set(&severity=3,&code=10,&category="initialization",&message="Starting Cholesky factorization",&location=debug_loc(__FILE__,9),&suggestion="Proceed; this is a standard setup step.")call err%print()! Warning: potential numerical issuecall err%set(&severity=2,&code=20,&category="numerical-warning",&message="Matrix is not positive definite",&location="simple.f90:18",&suggestion="Check matrix symmetry and eigenvalues before factorization.")call err%print()! Error: hard failurecall err%set(&severity=1,&code=30,&category="arithmetic-error",&message="Division by zero detected in pivot step",&location="simple.f90:27",&suggestion="Ensure pivot elements are nonzero; consider partial pivoting.")call err%print()call err%reset()end program simple