BLI: support equality operator on Span and Vector

This is quite convenient sometimes and is available for `std::vector` as well.

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_span.hh b/source/blender/blenlib/BLI_span.hh
index f4960df8ab9..fcc6d6f754b 100644
--- a/source/blender/blenlib/BLI_span.hh
+++ b/source/blender/blenlib/BLI_span.hh
@@ -417,6 +417,19 @@ template<typename T> class Span {
     return Span<NewT>(reinterpret_cast<const NewT *>(data_), new_size);
   }
 
+  friend bool operator==(const Span<T> a, const Span<T> b)
+  {
+    if (a.size() != b.size()) {
+      return false;
+    }
+    return std::equal(a.begin(), a.end(), b.begin());
+  }
+
+  friend bool operator!=(const Span<T> a, const Span<T> b)
+  {
+    return !(a == b);
+  }
+
   /**
    * A debug utility to print the content of the Span. Every element will be printed on a
    * separate line using the given callback.