C ++运行时字符串格式化 [英] C++ Runtime string formatting

问题描述

通常我使用流来格式化的东西，但在这种情况下？我不知道格式，直到运行时。

Usually I use streams for formatting stuff however in this case ?I don't know the format until runtime.

我想要能够采取像以下格式字符串：

Hello {0}！您最后一次登录的时间是{1，日期：dd / mm / yy}。

...并在变量Fire Lancer和1247859223中提供，最后使用以下格式化字符串： br />
Hello Fire Lancer！您最后一次登录的时间是17/07/09。

I want to be able to take something like the following format string:
Hello {0}! Your last login was on {1,date:dd/mm/yy}.
...and feed in the variables "Fire Lancer" and 1247859223, and end up with the following formatted string:
Hello Fire Lancer! Your last login was on 17/07/09.

在其他语言中，我使用内置的支持这种东西，例如pythons格式字符串方法， c ++似乎没有任何这样的功能，接受不是很安全的C打印方法。

In other languages I use there is built in support for this kind of thing, eg pythons format string method, however in c++ there doesn't seem to be any such functionality, accept the C print methods which are not very safe.

这也是一个高性能的程序，所以任何解决方案我使用需要解析格式字符串一次并存储它（例如mayby一个Parse方法返回FormatString对象与格式（字符串）方法），不重新解析字符串每次格式化方法被调用...

Also this is for a high performance program, so whatever solution I use needs to parse the format string once and store it (eg mayby a Parse method that returns a FormatString object with a Format(string) method), not reparse the string every time the format method is called...

推荐答案

Boost格式化为您：

Boost Formatting does that for you:

http://www.boost.org/doc/libs/1_39_0/libs/format/ doc / format.html

查看此

Check out this question and answer for examples of usage:

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