// E03-S06: conformance failures are reported at the class declaration line,
// column 1. Missing, private, parameter-mismatched, return-mismatched,
// conflicting same-name requirements, and a class used as an interface.
// SYMBOL line column message (message compared case-insensitively)
IFC_METHOD_MISSING 28 1 AREA IS NOT IMPLEMENTED
IFC_METHOD_MISSING 31 1 LABEL IS NOT IMPLEMENTED
IFC_SIGNATURE_MISMATCH 37 1 SCALE DIFFERS FROM INTERFACE
IFC_SIGNATURE_MISMATCH 43 1 OK DIFFERS FROM INTERFACE
IFC_SIGNATURE_CONFLICT 49 1 SHOW HAS CONFLICTING SIGNATURES
IFC_NOT_INTERFACE 54 1 NOTIFACE IS NOT AN INTERFACE