[doctest] run with "--help" for options
===============================================================================
generators.cpp(0):
TEST CASE:  GENERATE filter test-case target

generators.cpp(0): MESSAGE: tc target x=1 y=10

generators.cpp(0): MESSAGE: tc target x=1 y=20

generators.cpp(0): MESSAGE: tc target x=2 y=10

generators.cpp(0): MESSAGE: tc target x=2 y=20

===============================================================================
[doctest] test cases: 1 | 1 passed | 0 failed |
[doctest] assertions: 4 | 4 passed | 0 failed |
[doctest] Status: SUCCESS!
Program code.
