On 27 jul, 22:22, Kenton Varda <[email protected]> wrote:
>
> I agree, but we don't have a good API for querying which extension is set.
> We might fix that someday by introducing language-level support for
> "unions".
Ok. So my struggle to find this API is more or less justified :-)
> > for each defined extension:
>
> > fdExtensions.push_back(msgReflection.findKnownExtensionByName(extensionName
> > ));
>
> > and then in the parse method
>
> > for(int i;i< fdExtensions; i++)
> > if(msgReflection.HasField(msg,fdExtensions[i]) {
> > Parser p = parsers.get(fdExtensions[i]);
> > if(p != null) p.parse()
> > }
>
> Just use:
>
> vector<FieldDescriptor*> fields;
> msgReflection->ListFields(msg, &fields);
> for (int i = 0; i < fields.size(); i++) {
> if (field[i]->is_extension()) {
> // handle extension
> }
> }
Ok thanks! Iterating over the number of fields might be faster than
iterating over the number of extensions as I did in my example.
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