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### 4.5 Status of Fortran 2018 support

So far very little work has been done to support Fortran 2018.

- ERROR STOP in a PURE procedure An `ERROR STOP` statement is permitted in a `PURE` procedure.
- IMPLICIT NONE with a spec-list Support the `IMPLICIT NONE` statement with an `implicit-none-spec-list`.
- Behavior of INQUIRE with the RECL= specifier

  The behavior of the `INQUIRE` statement with the `RECL=` specifier now conforms to Fortran 2018.