In C++ I can use typeid operator to retrieve the name of any polymorphic class:
const char* name = typeid( CMyClass ).name();
How long will the string pointed to by the returned const char* pointer available to my program?
views:
116answers:
2
+10
A:
As long as the class with rtti exists. So if you deal with single executable - forever. But for classes in a Dynamic Link Librariy it shifts a little. Potentially you can unload it.
Dewfy
2010-01-21 13:55:44
+1 Most accurate answer, though you need to fix that first sentence, I know what you're trying to say, but it just seems like gibberish
Grant Peters
2010-01-21 14:14:21
+3
A:
The memory returned by type_info::name() will be available for the application's lifetime.
sbi
2010-01-21 13:55:44
Is this guaranteed by the Standard? I know that the result of `typeid()` has application lifetime but I can't find anything that places a lifetime on the result of `type_info::name()`.
D.Shawley
2010-01-21 14:26:35
TTBOMK, it is with the caveat given by Dewfy. However, since the standard doesn't even acknowledge the existence of dynamic libraries...
sbi
2010-01-21 14:59:32