Changeset 936d95c for doc


Ignore:
Timestamp:
Oct 29, 2020, 1:43:33 PM (11 months ago)
Author:
Andrew Beach <ajbeach@…>
Branches:
arm-eh, jacob/cs343-translation, master, new-ast-unique-expr
Children:
93068e53
Parents:
c960331
Message:

The vtable proposal now notes how the assotiated types proposal might help it.

File:
1 edited

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  • doc/proposals/vtable.md

    rc960331 r936d95c  
    512512possibly like the one used to create the assertion.
    513513
     514### Extension: Associated Types Use
     515If the `associated_types.md` proposal is accepted the following trait could
     516be added:
     517
     518    trait is_virtual(dtype T) {
     519        dtype table;
     520        // An example assertion:
     521        const table & get_virtual_table(T &);
     522    }
     523
     524There may be more assertions but there has to be at least one way to find
     525the (possibly default) virtual table. It is required to construct instances
     526of the type.
     527
     528Without the assotiated type it would look like this:
     529
     530    trait is_virtual(dtype T, dtype table) {
     531        const table & get_virtual_table(T &);
     532    }
     533
     534Which is just a little bit longer to use but becomes more problematic if the
     535user has to explicately provide the table's name as it doesn't really have its
     536own type name. If it does it is probably mangled.
     537
    514538### Virtual Tables as Types
    515539Here we consider encoding plus the implementation of functions on it to be a
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