http://llvm.org/bugs/show_bug.cgi?id=20508
Bug ID: 20508
Summary: basic_string does not respect NullablePointer
requirements of the allocator's pointer
Product: libc++
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12843
--> http://llvm.org/bugs/attachment.cgi?id=12843&action=edit
Compilation failure of basic_string with fancy pointer allocator
I'm attaching a complete example, but the problem is easily described:
The pointer type, std::allocator_traits<A>::pointer, is not required to be
trivially constructible. In fact, it is *impossible* for this type to be
trivially constructible if it is a class type, since it must value-initialize
to the null value.
However, the current implementation of basic_string assumes that the pointer
type is trivially constructible (since it puts the type into a union without
any user-provided constructors). This makes it impossible to use basic_string
with fancy pointers.
I haven't thought too much about a solution, but I think that adding suitable
constructors to the SSO union __rep and to the type __long would make this work
and wouldn't be too invasive a change.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
