Add only_interfaces and with to the bindgen! macro.
#6160
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alexcrichton
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…liance#6160) * Add `only_interfaces` and `with` to the `bindgen!` macro. * Add a version of the empty_error test for `only_interfaces` and `with` * Review feedback * Add docs
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Add the
only_interfacesandwithoptions to thebindgen!macro. These two additional options enable the definitions of a use ofbindgen!to be split up and reused in the following way:only_interfaces: trueto an invocation ofbindgen!will cause only the interfaces depended on by the supplied world to be generated, allowing the interface definitions depended on by two world files to be shared.with: { "a": module::name }allows references to theaimport to be remapped to a known module, in this casemodule::name. When this option is supplied, no code will be generated for the interfacea, assuming that those definitions came from a previous use ofbindgen!withonly_interfaces: true.Here's a use in the
preview2-prototypingrepository for a motivating example of how this can be used with thecommandworld.