An opaque type declaration has the form: 'TYPE … … [p. 40 (2.4.7)] A revelation introduces information about an opaque … A partial revelation has the form: 'REVEAL T … A complete revelation has the form: 'REVEAL T … A revelation is allowed only in an interface … For example, consider: … 'INTERFACE IClass; IMPORT I; REVEAL I.T <: MUTEX; … An importer of ICLASS sees that every I.T …
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