如何在capnproto C ++生成的代码中设置列表的字符串项? [英] How to set a string item of a list in capnproto C++ generated code?

问题描述

我有这样的capnproto定义:

I have capnproto definition like this:

struct School {
  name @0 :Text;
  address @1 :Address;
  foundation @2 :Date;
  emailAddresses @3 :List(Text);
}

我想在构建器中使用与此类似的代码设置emailAddresses字段(但这不会编译):

I would like to set the emailAddresses field in a builder with code similar to this (but this won't compile):

static School::Builder random_School() {
  capnp::MallocMessageBuilder msg;
  School::Builder result = msg.initRoot<School>();
  result.setName(rand_str(36));
  result.setAddress(random_Address());
  result.setFoundation(random_Date());
  result.initEmailAddresses(item_count);
  for (size_t i = 0; i < item_count; ++i) {
    result.getEmailAddresses()[i] = rand_str(37); // rand_str returns std::string
  }
  return result;
}

正确的方法是什么?

推荐答案

根据capnproto 文档在列表"部分中，您应该使用builder.set(index，value).

According to the capnproto documentation in the Lists section, you should use builder.set(index, value).

result.getEmailAddresses().set(i, rand_str(37));

我想它应该现在编译.

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