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Imply span_FEATURE_MAKE_SPAN from span_FEATURE_NON_MEMBER_FIRST_LAST_SUB #35

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martinmoene opened this issue Jan 16, 2019 · 0 comments
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@martinmoene
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martinmoene commented Jan 16, 2019

Imply span_FEATURE_MAKE_SPAN when span_FEATURE_NON_MEMBER_FIRST_LAST_SUB is on, as the non-member functions first(), last() and subspan() require make_span().

Currently enabling first() etc. without enabling make_span() leads to #error.

Plan:

  • In code, imply span_FEATURE_MAKE_SPAN from span_FEATURE_NON_MEMBER_FIRST_LAST_SUB
  • Document span_FEATURE_MAKE_SPAN, mentioning it is implied by span_FEATURE_NON_MEMBER_FIRST_LAST_SUB
  • In document of span_FEATURE_NON_MEMBER_FIRST_LAST_SUB, mention it implies span_FEATURE_MAKE_SPAN

Originates from issue #32 .

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