[英]C++ Convert stringstream into ifstream?
I am working with two pieces of code,我正在处理两段代码,
The first class uses an AAssetManager (Android NDK object) to read an "asset" and save it's contents to a single string.第一个类使用 AAssetManager(Android NDK 对象)读取“资产”并将其内容保存为单个字符串。 It then turns the string into a stringstream and parses it.
然后它将字符串转换为字符串流并对其进行解析。
The second class parses type ifstream, which must be associated with a file.第二个类解析类型 ifstream,它必须与文件相关联。
Is there some way I can convert a string or stringstream into an ifstream so I don't have to change the entirety of one of these classes?有什么方法可以将字符串或字符串流转换为 ifstream,这样我就不必更改其中一个类的全部内容吗?
You can turn the ifstream
into an istream
.您可以将
ifstream
转换为istream
。 An ifstream
is simply a more specific form of an istream
. ifstream
只是istream
一种更具体的形式。 A stringstream
inherits from an istream
, so you can just pass the stringstream
directly. stringstream
从istream
继承,因此您可以直接传递stringstream
。 If this is not available to you, then you would store the string to a file, then reopen the file with an ifstream
, and pass that ifstream
to the second function.如果这对您不可用,那么您可以将该字符串存储到一个文件中,然后使用
ifstream
重新打开该文件,并将该ifstream
传递给第二个函数。
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