Add 'rules/' from commit 'd44be66f2a916168e0f5a7055e49f12c252b2cd2'

git-subtree-dir: rules
git-subtree-mainline: 247e09b1ba01deb5649c6a73a7f272e1f72178fe
git-subtree-split: d44be66f2a916168e0f5a7055e49f12c252b2cd2

1 files changed, 32 insertions, 0 deletions

diff --git a/rules/CC/auto/EXPRESSIONS b/rules/CC/auto/EXPRESSIONS
new file mode 100644
index 0000000..ac19f7a
--- /dev/null
+++ b/rules/CC/auto/EXPRESSIONS
@@ -0,0 +1,32 @@
+{ "last_list_entry":
+  { "vars": ["list"]
+  , "expression":
+    { "type": "foldl"
+    , "range": {"type": "var", "name": "list"}
+    , "start": null
+    , "body": {"type": "var", "name": "_"}
+    }
+  }
+, "first_list_entry":
+  { "vars": ["list"]
+  , "imports": {"last": "last_list_entry"}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "list"
+        , { "type": "foldl"
+          , "range": {"type": "var", "name": "list", "default": []}
+          , "start": null
+          , "body":
+            { "type": "if"
+            , "cond": {"type": "var", "name": "$1"}
+            , "then": {"type": "var", "name": "$1"}
+            , "else": [{"type": "var", "name": "_"}]
+            }
+          }
+        ]
+      ]
+    , "body": {"type": "CALL_EXPRESSION", "name": "last"}
+    }
+  }
+}