Fortran Constants

real-or-imag-part

        : real_constant

        | PLUS real_constant

        | MINUS real_constant

        | integer_constant

        | PLUS integer_constant

        | MINUS integer_constant

constant

        : real_constant

        | integer_constant

        | complex-constant

        | character_constant

        | LOGICALconstantWithKind

character_constant

        : CHARACTERconstantWithKind

        | string

complex-constant

        : LPAREN real-or-imag-part COMMA real-or-imag-part RPAREN