Added flat iteration over a sliced cspan.

1 files changed, 4 insertions, 1 deletions

diff --git a/docs/cspan_api.md b/docs/cspan_api.md
index 6da2acca..c0b86239 100644
--- a/docs/cspan_api.md
+++ b/docs/cspan_api.md
@@ -38,9 +38,12 @@ ValueType*      cspan_front(SpanTypeN* self);
 ValueType*      cspan_back(SpanTypeN* self);
 
 SpanType        cspan_at2(SpanType2* self, size_t x);                   // return a 1d subspan from a 2d span.
-SpanTypeN       cspan_at3(SpanType3* self, size_t x, ...);              // return a 1 or 2d subspan from a 3d span.
+SpanTypeN       cspan_at3(SpanType3* self, size_t x, ...);              // return a 1d or 2d subspan from a 3d span.
 SpanTypeN       cspan_at4(SpanType4* self, size_t x, ...);              // number of args determines rank of output span.
 
+void            cspan_slice(SpanTypeN* self, uint32_t xslice[2], ...);  // slice multidim span into a md subspan.
+uint32_t[2]     c_SLICE(a, b)                                           // use to specify a:b xslice, ... b is optional.
+
                 // return a subspan of same rank:
 SpanType        cspan_subspan(const SpanType* self, size_t offset, size_t count);
 SpanType2       cspan_subspan2(const SpanType2 self, size_t offset, size_t count);