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Bo Persson · Guest

===================================== MODERATOR'S COMMENT:

Approved for comp.std.c++ and forwarded to the C++ committee.

===================================== END OF MODERATOR'S COMMENT
This is based on N2134, where 21.3.1/2 states:
"... The Allocator object used shall be a copy of the Allocator object
passed to the basic_string object's constructor or, if the constructor does
not take an Allocator argument, a copy of a default-constructed Allocator
object."

Section 21.3.2/1 lists two constructors:

basic_string(const basic_string<charT,traits,Allocator>& str );

basic_string(const basic_string<charT,traits,Allocator>& str ,
size_type pos , size_type n = npos,
const Allocator& a = Allocator());

and then says "In the first form, the Allocator value used is copied from
str.get_allocator().", which isn't an option according to 21.3.1.

Bo Persson

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