Hi,
Regular Readers and Builders do not currently have equality operators, but
the Any* types (in capnp/any.h) do, and you can convert other types to that
type. So:
capnp::AnyStruct::Reader left = bookReader;
capnp::AnyStruct::Reader right = bookWriter.asReader();
return left == right;
-Kenton
On Thu, Jun 2, 2016 at 3:01 PM, <[email protected]> wrote:
> In fact I take back the TestAnyPointer::Builder blob as it looks like
> that's generated code. Can you please help understand how can the two capnp
> objects be compared?
>
>
> On Thursday, June 2, 2016 at 5:45:06 PM UTC-4, [email protected]
> wrote:
>>
>> Hi,
>>
>> I'm currently experimenting with Cap'n Proto and need to write some
>> custom benchmark tests. One of the things I need to do is to ensure the
>> stored and retrieved data is the same. The way I'm doing that currently
>> (for learning the API's mainly) is
>>
>>
>> ::capnp::MallocMessageBuilder message;
>>
>> AddressBook::Builder bookWriter = message.initRoot<AddressBook>();
>>
>>
>> /* Generic function to add data to the AddressBook */
>>
>> writeAddressBook(bookWriter);
>>
>>
>> /* Write to array buffer*/
>>
>> const kj::Array<capnp::word> serializedBuffer =
>> messageToFlatArray(message);
>>
>>
>> /* Read From array buffer */
>>
>> ::capnp::FlatArrayMessageReader reader(serializedBuffer.asPtr());
>>
>> AddressBook::Reader bookReader = reader.getRoot<AddressBook>();
>>
>>
>> if (bookReader == bookWriter) {
>>
>> std::cout << "Valid in-memory write-read" << std::endl;
>>
>> } else {
>>
>> std::cout << "Oops!!!" << std::endl;
>>
>> }
>>
>>
>>
>> I see some examples in the test.capnp.h where you can get
>> AnyPointer::Builder like so:
>>
>>
>> inline ::capnp::AnyPointer::Builder
>> TestAnyPointer::Builder::getAnyPointerField() {
>>
>> return ::capnp::AnyPointer::Builder(
>>
>> _builder.getPointerField(0 * ::capnp::POINTERS));
>>
>> }
>>
>>
>> But I guess I'm having a hard time imagining jumping through hoops like
>> to to compare two capnp objects. Is there a better solution for testing
>> equality of two objects; if so please help with example code.
>>
>>
>> Thanks.
>>
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