如何将标准容器作为字段添加到 OMNet++ 消息中? [英] How can a standard container be added as a field to an OMNet++ message?

问题描述

我正在尝试创建一个简单的消息定义包含使用 std::vector 实现的字段.根据 OMNet++ 5.5 手册 ch.6 秒.8.1，这看起来很简单.

I'm trying to create a simple message definition that contains a field implemented using std::vector. Per the OMNet++ 5.5 manual ch. 6 sec. 8.1, this is seemingly straightforward.

但是，我使用的是 OMNet++ 6.0pre6:我无法弄清楚这样做的正确方法是什么，因为手册已经过时¹，并且更改非常肤浅在 nedxml 变更日志中引用.

However, I'm using OMNet++ 6.0pre6: I can't figure out what the correct way of doing this is, as the manual is out of date¹, and the changes are very superficially referred to in the nedxml changelog.

消息定义可以归结为中的确切示例手册，但在这种情况下，它是一个 message 而不是 packet(两者都会产生相同的错误):

The message definition can be boiled down to the exact example in the manual, but in this case it is a message rather than a packet (either yields same error):

cplusplus {{
#include <vector>
typedef std::vector<int> IntVector;
}}

class noncobject IntVector;

message SimpleMsg {
    int this_thing;
    int that_thing;
    IntVector these_things;
}

以下错误由 opp_msgtool(消息到 C++ 的转译器)提供:

The following errors were provided by opp_msgtool, the messages-to-C++ transpiler:

SimpleMsg.msg:6: Error: Type declarations are not needed with imports, try invoking the message compiler in legacy (4.x) mode using the --msg4 option
SimpleMsg.msg:11: Error: unknown type 'IntVector' for field 'these_things' in 'SimpleMsg'

认为导入不需要类型声明可能是从 OMNet 5.x 到 6.x 更改的简单总结，我继续删除 class noncobject IntVector.虽然它消除了第一个错误，但它仍然会产生 Error: unknown type 'IntVector' for field 'these_things' in 'SimpleMsg'.

Thinking type declarations are not needed with imports could be the simple summary of the changes from OMNet 5.x to 6.x, I proceeded to remove class noncobject IntVector. While it removes the first error, it still yields Error: unknown type 'IntVector' for field 'these_things' in 'SimpleMsg'.

想法?建议?要吸取的教训?

Ideas? Suggestions? Lessons to be had?

编辑:特别是发现 nedxml 更改日志中有一些注释涉及 4.0-5.x 和 6.0 之间的更改，但如何理想地使用它不太清楚.

EDIT: Notably found that there are some notes in the nedxml changelog referring to changes between 4.0-5.x and 6.0, but how to ideally use it is less clear.

¹ 至少不能完全适用于 OMNet++ 6.0.

¹ Certainly not wholly applicable to OMNet++ 6.0 at the very least.

推荐答案

应该是这样的:

cplusplus {{
#include <vector>
typedef std::vector<int> IntVector;
}}

class IntVector {
    @existingClass;
}

message SimpleMsg {
    int this_thing;
    int that_thing;
    IntVector these_things;
}

另一种解决方案"是强制消息编译器兼容 4.x(旧模式).只需在 makefrag 文件中添加以下行

An alternate 'solution' is to force the message compiler into 4.x compatible (old mode). Just add the following line in a makefrag file

MSGC:=$(MSGC) --msg4

但是，您迟早应该转换您的代码.如果您希望您的代码同时使用 OMNeT++ 5.5 和 6.0 进行编译，那么您绝对应该明确指定 MSG 编译器版本.兼容 4.x 或 6.x.

However, sooner or later you should convert your code. If you want your code to compile with both OMNeT++ 5.5 and 6.0 then you should definitely specify the MSG compiler version explicitly. Either to be 4.x or 6.x compatible.

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