C: Fix as-patterns in C output

Most such patterns are re-written away by various re-writing steps,
but for those that arn't they are fairly easy to handle by just having
as patterns directly in the ANF-patterns.

Fixes #39

2 files changed, 20 insertions, 0 deletions

diff --git a/test/c/anf_as_pattern.expect b/test/c/anf_as_pattern.expect
new file mode 100644
index 00000000..9766475a
--- /dev/null
+++ b/test/c/anf_as_pattern.expect
@@ -0,0 +1 @@
+ok
diff --git a/test/c/anf_as_pattern.sail b/test/c/anf_as_pattern.sail
new file mode 100644
index 00000000..9b9196b1
--- /dev/null
+++ b/test/c/anf_as_pattern.sail
@@ -0,0 +1,19 @@
+default Order dec
+
+$include <prelude.sail>
+
+val "print_endline" : string -> unit
+
+function test () : unit -> option(int) = {
+  match Some(3) {
+    Some(_) as x => x,
+    _ => None()
+  }
+}
+
+function main() : unit -> unit = {
+  match test() {
+    Some(3) => print_endline("ok"),
+    _ => print_endline("fail")
+  }
+}
\ No newline at end of file