Fix Issue 12668 -  std.traits.functionAttributes should use the new
getFunctionAttributes trait.
Make emplaceRef parameter optional
emplaceRef unittest
SList: removed unnecessary code in opBinary
SList: add missed opBinaryRight
SList: small change in unittests
Mark std.file.read as @trusted
Change ReadFile(...) == 1 to ReadFile(...) != 0
Using nested trusted functions
Fix trustedRef
Convert std.math.isFinite into a template
Convert std.math.isSubnormal into a template
Add floatTraits.SIGNPOS_BYTE for float
Convert std.math.signbit into a template
Convert std.math.copysign into a template
Fixup use of whitespace in places
Enable Unique!struct unittest

Prevent double delete of Foo by calling release in f().
Cleanup unittests a little.
Enable Unique!class unittest

Call release as a workaround to prevent Bar deletion in g(), leading to
access violation.
Fix Issue 13068 - std.typecons.Unique should disable postblit
Don't delete null reference/pointer