Syntax
=====

.. code-block:: text

    evol_ther = CALC_CHAM_FLUI (
        ◆ RIGI_THER = matr_asse_temp_r,
        ◆ CHAM_MATER = cham_master,
        ◆ EXCIT = _F (
             ◆ CHARGE = char_ther,
             ◇ FONC_MULT = tablecloth/formula/function,
          ),
        ◇ POTENTIEL =/"DEPL" (by default),
                      /"VITE ",
                      /"PRES ",
        ◇ DIST_REFE = float (default: 0.01),
        ◆ MODE_MECA = meca fashion,
        # If: exists (" MODE_MECA ")
            ◇ COEF_MULT = float (default: 1.0),
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices