Work around broken MS `std::basic_ostream`.

MSVC's `std::basic_ostream<CHAR>` template is not implemented in a general way:
it can only be instantiated for certain specific `CHAR` types. Declaring a
`std::basic_ostringstream<llwchar>` fails on MSVC with C2941.

Fortunately both llstring.cpp functions that build a `LLWString` incrementally
have the same characteristics: (a) they each build it one character at a time,
and (b) the length of the result `LLWString` won't exceed the known length of
the input string. So it works to declare a `std::vector<llwchar>`, `reserve()`
the input length and `push_back()` individual characters. Then we can use
`LLWString`'s range constructor to immediately allocate the right size.

0 files changed, 0 insertions, 0 deletions