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-rw-r--r--lib/basis.lig2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/basis.lig b/lib/basis.lig
index 94977faf..72a8ddf8 100644
--- a/lib/basis.lig
+++ b/lib/basis.lig
@@ -4,6 +4,8 @@ type string
type unit = {}
+datatype bool = False | True
+
con tag :: {Type} -> {Unit} -> {Unit} -> {Type} -> {Type} -> Type