是否可以在编译时/运行时生成标记字符串的全局列表? [英] Is it possible to generate a global list of marked strings at compile time/runtime?

问题描述

因此，我正在努力将C ++应用程序翻译成多种语言.我当前正在使用的是类似的东西:

So, I'm working on translating my C++ app into multiple languages. What I'm currently using is something like:

#define TR(x) (lookupTranslatedString( currentLocale(), x ))
wcout << TR(L"This phrase is in English") << endl;

翻译来自CSV文件，该文件将英语字符串映射到翻译后的字符串.

The translations are from a CSV file which maps the english string to the translated string.

"This phrase is in English","Nasa Tagalog itong pagsabi"

这是简化的，但这是基本思想.

This is simplified, but that's the basic idea.

我的问题是关于生成需要翻译的英语短语列表.我只需要带有所有英语短语和空白翻译短语的CSV文件.我希望有可能在编译时或在运行时生成此列表.在编译时，我在想这样的事情:

My question is about generating the list of English phrases that need to be translated. I just need the CSV with all the english phrases, and blank translated phrases. I was hoping that it might be possible to either generate this list at compile time or at runtime. At compiletime I was thinking something like this:

#define TR(x) \
    #warning x \
    (lookupTranslatedString( currentLocale(), x ))

，然后解析编译日志或其他内容.这似乎效果不佳.

and then maybe parse the compile log, or something. This seems not to work so well.

在运行时也很棒.我正在考虑只是启动该应用程序，并拥有一个隐藏的命令，该命令将转储英文CSV.我已经看到了用于使用全局变量向中央列表注册命令的类似方法.它可能看起来像这样:

At runtime would also be great. I was thinking of just starting the app and having a hidden command that would dump the english CSV. I've seen similar methods used to register commands with a central list, using global variables. It might look something like this:

class TrString
{
public:
    static std::set< std::wstring > sEnglishPhrases;
    TrString( std::wstring english_phrase ) { sEnglishPhrases.insert( english_phrase ); }
};

#define TR(x) do {static TrString trstr(x);} while( false ); (lookupTranslatedString( currentLocale(), x ));

我知道上面的代码有两个问题.我怀疑它会编译，但是更重要的是，为了生成所有英语短语的列表，在访问sEnglishPhrases之前，我需要点击每个代码路径.

I know there's two problems with the above code. I doubt it compiles, but more importantly, in order to generate a list of all english phrases, I'd need to hit every single code path before accessing sEnglishPhrases.

看来我最终会写一个小解析器来阅读我所有的代码并寻找TR字符串，这实际上并不那么困难.我只是希望对C ++有所了解，如果有更好的方法可以做到这一点.

It looks like I'll end up writing a small parser to read through all my code and look for TR strings, which isn't really that tough. I was just hoping to learn a little more about C++, and if there's a better way to do this.

推荐答案

我认为您快到了.采取最后一个想法:

I think you're almost there. Taking the last idea:

class TrString
{
public:
    static std::set< std::string > sEnglishPhrases;
    std::string phrase;
    TrString(const std::string& english_phrase ):phrase(english_phrase)
    { sEnglishPhrases.insert( english_phrase ); }
    friend ostream &operator<<(ostream &stream, const TrString& o);
};

ostream &operator<<(ostream &stream, const TrString& o)
{
    stream << lookupTranslatedString( currentLocale(), o.phrase);
    return stream;
}

#define TR(x) ( TrString(x) )
// ...
std::cout << TR("This phrase is in English") << std::endl;

正如您所说，您确实需要在每个TR()语句上运行代码，但是您可以配置一个单元测试框架来做到这一点.

And as you say, you do need to run the code over every TR() statement, but you could configure a unit test framework to do this.

我的替代方法是使用上面的TrString类为每个模块创建静态变量:

My alternative would be to use the above TrString class to make static variables for each module:

// unnamed namespace gives static instances
namespace
{
   TrString InEnglish("This phrase is in English");
   // ...
}

现在，您只需要链接其他的main()即可打印出TrString :: sEnglishPhrases

Now you just need to link in an alternative main() to print out TrString:: sEnglishPhrases

这篇关于是否可以在编译时/运行时生成标记字符串的全局列表?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！