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-rw-r--r--src/Test.hs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Test.hs b/src/Test.hs
index b2644b6..b6a85ae 100644
--- a/src/Test.hs
+++ b/src/Test.hs
@@ -96,6 +96,11 @@ instance ExprType Regex where
textExprValue _ = T.pack "<regex>"
emptyVarValue = either error id $ regexCompile T.empty
+instance ExprType a => ExprType [a] where
+ textExprType _ = "[" <> textExprType @a Proxy <> "]"
+ textExprValue x = "[" <> T.intercalate ", " (map textExprValue x) <> "]"
+ emptyVarValue = []
+
data SomeVarValue = forall a. ExprType a => SomeVarValue a
data RecordSelector a = forall b. ExprType b => RecordSelector (a -> b)