I recently learned, that since a few years the library libstdc++ contains vstring
(also known as versa_string
), which provides the same functionality as std::string
, but is apparently more conforming to the C++ standard. I have tried to use vstring
as a replacement for std::string
, but I have found no easy way to do it.
Is there an easy way to replace std::string
with vstring
, without changing the libstdc++ sources?
I am fine with replacing all uses of std::string
within my code by an alias, as indicated by the following listing. However, the problem with this approach is, that std::string
is also used internally in some places, e.g. in std::ostringstream
. That means, the statements std::ostringstream os; my::string s = os.str();
no longer works.
namespace my {
#ifdef __GLIBCXX__
using string = __gnu_cxx::__vstring;
#else
using string = std::string;
#endif
}
Replace part of a string with another string in C++ In C++ the replacing is very easy. There is a function called string. replace(). This replace function replaces only the first occurrence of the match.
There is no functionality difference between string and std::string because they're the same type.
No, there is no way to replace std::string
with vstring
, it's meant as an alternative string type, not a drop-in replacement for std::string
Since GCC 5.1 the library ships with two implementations of std::string
and for any given translation unit you can choose which to use via the _GLIBCXX_USE_CXX11_ABI
macro. The two string types have different mangled names, so are not link-compatible.
See Dual ABI for more details.
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