P1636 Formatters for library types

[wg21bot]

P1636R0 Formatters for library types (Lars Gullik Bjønnes)

[tituswinters]

unique_ptr and shared_ptr should format via cast-to-void*. (If no, then formatting unique_ptr and shared_ptr is unsupported.)
SF F N A SA
0 3 5 3 1

Throw invalid_format when encountering a leading 0 in the width specifier for complex.
SF F N A SA
0 1 2 7 0

Update paper with “basic_streambuf is not supported by format.”
Unanimous consent

Make the above clarifications, forward to LWG for C++20.
SF F N A SA
3 7 0 0 0

In theory, adding formatters after we ship C++20 is not a breaking change (so long as users aren't defining their own formatters for our types). This is a nice-to-have for C++20.

[wg21bot]

P1636R1 Formatters for library types (Lars Gullik Bjønnes)

[wg21bot]

P1636R2 Formatters for library types (Lars Gullik Bjønnes)

[mclow]

This was not adopted for C++20. Removing the "C++20" label.