Syntax
=====

.. code-block:: text

    mesh = LIRE_MAILLAGE (
        ◇ FORMAT =/"ASTER ",
                   /"GIBI ",
                   /"GMSH ",
                   /"IDEAS ",
                   /"MED" (by default),
        VERI_MAIL = _F (
             ◇ VERIF =/"OUI" (by default),
                       /"NON ",
             ◇ APLAT = float (default: 0.001),
          ),
        # If: (not equal_to (" FORMAT ", 'MED'))
            ◇ UNITE = unit (default: 20),
        # If: (equal_to (" FORMAT ", 'MED'))
            ◇ UNITE = unit (default: 20),
            ◇ NOM_MED = text,
            ◇ INFO_MED =/0 (by default),
                         /1,
            ◇ PARTITIONNEUR =/"SANS" (by default),
                              /"PTSCOTCH ",
        # If: (equal_to (" FORMAT ", 'IDEAS'))
            ◇ CREA_GROUP_COUL =/"OUI ",
                                /"NON" (by default),
        ◇ INFO =/0,
                 /1 (by default),
                 /2,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices