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-rw-r--r--backends/lean/primitives.lean1
1 files changed, 1 insertions, 0 deletions
diff --git a/backends/lean/primitives.lean b/backends/lean/primitives.lean
index 9e72b708..09ece14e 100644
--- a/backends/lean/primitives.lean
+++ b/backends/lean/primitives.lean
@@ -100,6 +100,7 @@ def USize.checked_sub (n: USize) (m: USize): result USize :=
fail integerOverflow
-- TODO: settle the style for usize_sub before we write these
+def USize.checked_add (n: USize) (m: USize): result USize := sorry
def USize.checked_mul (n: USize) (m: USize): result USize := sorry
def USize.checked_div (n: USize) (m: USize): result USize := sorry