Syntax
=====

.. code-block:: text

    ENGENDRE_TEST (
        ◇ UNITE = unit (default: 8),
        ◇ FORMAT =/"ASTER" (by default),
                   /"OBJET ",
        ◇ FORMAT_R = text (default: "1 PE20 .13"),
        ◇ PREC_R = text (default: "1.E-10"),
        # If: equal_to (" FORMAT ", 'ASTER')
            ◆ CO = result/table/cham_gd,
            ◇ TYPE_TEST =/"SOMME ",
                          /"SOMM_ABS" (by default),
                          /"MAX ",
                          /"MIN ",
        # If: equal_to (" FORMAT ", 'OBJET')
            ◆/TOUT = "OUI" (or not specified),
              /CO = data structure,
            ◇ TYPE_TEST = "SOMME ",
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices