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-rw-r--r--src/Block.hpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/Block.hpp b/src/Block.hpp
index 78c9cca..c3dfcec 100644
--- a/src/Block.hpp
+++ b/src/Block.hpp
@@ -18,4 +18,6 @@ struct BlockId {
unsigned char state : 4;
};
-bool operator==(const BlockId& lhs, const BlockId &rhs); \ No newline at end of file
+bool operator==(const BlockId& lhs, const BlockId &rhs);
+
+bool operator<(const BlockId& lhs, const BlockId &rhs); \ No newline at end of file