This fixes the following warning.
The member function operator== only works in C++17, and the friend operator== only works in C++20.
```
/Users/runner/.gradle/caches/transforms-2/files-2.1/c671f5a5dff922b8870f4eb33f4c8e2a/wpiutil-cpp-2022.1.1-alpha-3-1-g4e3fd7d-headers/wpi/json.h:1847:46: warning: ISO C++20 considers use of overloaded operator '==' (with operand types 'const typename json::object_t::iterator' (aka 'const StringMapIterator<wpi::json>') and 'const typename json::object_t::iterator') to be ambiguous despite there being a unique best viable function [-Wambiguous-reversed-operator]
return (m_it.object_iterator == other.m_it.object_iterator);
~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/runner/.gradle/caches/transforms-2/files-2.1/c671f5a5dff922b8870f4eb33f4c8e2a/wpiutil-cpp-2022.1.1-alpha-3-1-g4e3fd7d-headers/wpi/json.h:1863:20: note: in instantiation of member function 'wpi::detail::iter_impl<const wpi::json>::operator==' requested here
return not operator==(other);
^
/Users/runner/.gradle/caches/transforms-2/files-2.1/c671f5a5dff922b8870f4eb33f4c8e2a/wpiutil-cpp-2022.1.1-alpha-3-1-g4e3fd7d-headers/wpi/json.h:5008:20: note: in instantiation of member function 'wpi::detail::iter_impl<const wpi::json>::operator!=' requested here
if (it != end())
^
/Users/runner/.gradle/caches/transforms-2/files-2.1/c671f5a5dff922b8870f4eb33f4c8e2a/wpiutil-cpp-2022.1.1-alpha-3-1-g4e3fd7d-headers/wpi/json.h:5025:16: note: in instantiation of function template specialization 'wpi::json::value<std::basic_string<char>, 0>' requested here
return value(key, std::string(default_value));
^
/Users/runner/.gradle/caches/transforms-2/files-2.1/c671f5a5dff922b8870f4eb33f4c8e2a/wpiutil-cpp-2022.1.1-alpha-3-1-g4e3fd7d-headers/wpi/StringMap.h:442:8: note: ambiguity is between a regular call to this operator and a call with the argument order reversed
bool operator==(const DerivedTy &RHS) const { return Ptr == RHS.Ptr; }
^
```
I generated lists of includes and uses via
`rg -l deprecated.h | sort -u` and `rg -l WPI_DEPRECATED | sort -u`
respectively. If a file was in the first list but not the second, the
include was unused. If a file was in the second list but not the first,
the include needed to be added.
- Twine, StringRef, Format, and NativeFormatting have been removed
- Logging now uses fmtlib style formatting
- Nearly all uses of wpi::outs/errs have been replaced with fmt::print() or
std::puts()/std::fputs() (for unformatted strings).
- A wpi/fmt/raw_ostream.h header has been added to enable
fmt::print() with wpi::raw_ostream
* Update MSVC arguments
* Fix json allocator
* Fix simulation diamond
* Bump gtest
* Remove empty varargs in unit tests
* Replace test case with test suite
* Remove deprecation warning in optional
* Remove need for NOMIXMAX to be defined in wpilib headers
Also change header guards to WPI header guards.
Remove StringRef::c_str() customization, replacing the handful of uses with Twine or SmallString.
TCPStream: Include errno.h and make Windows includes lowercase for consistency.
Upstream LLVM version: eb4186cca7924fb1706357545311a2fa3de40c59
During shared library loading, a different libLLVM can be pulled in, causing
llvm symbols from dependent libraries to resolve to that library instead of
this one. This has been seen in the wild with the Mesa OpenGL implementation
in JavaFX applications (see wpilibsuite/shuffleboard#361).
This is clearly a very breaking change. For some level of backwards
compatibility, a namespace alias from llvm to wpi is performed in the "llvm"
headers. Unfortunately, forward declarations of llvm classes will still break,
but compilers seem to generate clear error messages in those cases
("namespace alias 'llvm' not allowed here, assuming 'wpi'").
This change also moves all the wpiutil headers to a single "wpi" subdirectory
from the previously split "llvm", "support", "tcpsockets", and "udpsockets".
Shim headers will be added for backwards compatibility in a later commit.
