问题
I am looking for the code for the c++ string class. What header is it implemented in?
回答1:
There is no single implementation for std::string. But you can find your particular implementation in the <string> header.
On my system it can be found here:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.0/include/g++-v4/bits/basic_string.h and /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.0/include/g++-v4/bits/basic_string.tcc
On a Debian-based system:
~$ locate basic_string.tcc
/usr/include/c++/4.5/bits/basic_string.tcc
/usr/include/c++/4.6/bits/basic_string.tcc
~$ locate basic_string.h
/usr/include/c++/4.5/bits/basic_string.h
/usr/include/c++/4.6/bits/basic_string.h
~$
Generally, you are going to be looking for the basic_string template, since std::string is just a specialization of that.
回答2:
As you might expect,
<string>
which will most likely be located in whatever include directory your compiler has as its base.
回答3:
It's in <string>. It's a header file distributed with your compiler. It may include other (private) header files - a lot of the implementation for Visual Studio is in a file named "xstring".
回答4:
A similar question with the answer for Visual Studio: https://stackoverflow.com/a/17205896/5520058
C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\crt\src\
The version and location of Visual Studio can be changed. This is the default installation path where the sources can be found.
Visual studio versions:
- 2005 -> 8
- 2008 -> 9
- 2010 -> 10
- 2012 -> 11
- 2013 -> 12
- 2015 -> 14
来源：https://stackoverflow.com/questions/3170295/where-can-i-find-the-implementation-for-stdstring