0.5.0

ring_span-lite v0.5.0 adds template parameter flag CapacityIsPowerOf2 and class ring.

CapacityIsPowerOf2 is an extension (nsrs_CONFIG_STRICT_P0059=0). With CapacityIsPowerOf2 being true, method normalize_() to compute the buffer index is optimized to use bitwise and instead of modulo division.

class ring is a data-owning ring class. See the discussion on design at issue #20.

Additions:

• Add data-owning class ring (#20, thanks to @peter-moran).
• Add ring_iterator::operator->() (#21, thanks @Lyle-Alloy, @Quuxplusone).
• Add CapacityIsPowerOf2 template parameter to class ring_span and class ring (#22, thanks @dcolascione).
• Add script test/tc-cl.bat to compile with clang-cl (nonstd-lite-project issues 54).
• Add export() to CMakeLists.txt enabling importing targets.
• Add image Visual Studio 2019 to AppVeyor CI.

Changes:

• Handle lest test framework as system include to prevent warnings.
• Change 'on conan' link to refer to conan center.

Fixes:

• none