0.6.0

ring_span-lite v0.6.0 adds a compile-time configuration flag to benefit from empty base-class optimization for the popper, and adds tweak header support.

Additions:

• Add configuration flag nsrs_CONFIG_POPPER_EMPTY_BASE_CLASS to make the popper a base class of class ring_span instead of a member (#23, thanks @dcolascione, @Quuxplusone).
• Add tweak header support, see nonstd-lite-project issue 44 .

Changes:

• none

Fixes:

• none