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Andre van Tonder <andre@xxxxxxxxxxxxxxxxxxx> writes: > Some miscellaneous issues: > > > - I've changed the syntax of the OPAQUE and SEALED clauses to carry a > > boolean operand. > > I notice this operand is evaluated at runtime. I am not too familiar > with the issues involved, but I suspect these attributes may > be useful for compile-time analysis of allocation and optimization > strategies, which may become more difficult with this choice. Yes; I'll restrict the operands to #t and #f literally. > > - I've changed the semantics of field-id to always be local to the > > specified rtd, rather than global. This makes it easier to later > > extend the abstractions to multiple inheritance, should anyone ever > > want to do so, and leaves less room for ambiguity. > > I cannot find where this explained in the document. It's in the specification of RECORD-ACCESSOR, specifically the sentences: >> Note that it is an error even if the procedure's argument is of a >> parent type from which the selected field was inherited. >> [...] >> If it is a symbol s, the field named s from the fields argument to >> make-record-type-descriptor is selected. If you have suggestions on making it clearer, I'd be more than happy to incorporate them. > > > > - The field names passed to MAKE-RECORD-TYPE-DESCRIPTOR are now > > required to be distinct. > > I think the sentence beginning with "If more than one field has the given name" > in the document is in conflict with this statement. Well, not in conflict, but certainly nonsensical and confusing. I'll remove the sentence. > Also, I cannot figure out from the document if parent fields may be > repeated in a child. They may be. I'll clarify. > Finally, I think an specification is still missing for the visibility > of the various defined bindings in the various 'expression's > occurring in the syntactic layer. Yes. More thinking needs to be done here, but I'm glad we both seem to agree there's been progress. -- Cheers =8-} Mike Friede, Völkerverständigung und überhaupt blabla