test: Add pre42_syntax.ml

Author: Julow

test/passing/gen/dune.inc

@@ -3712,6 +3712,21 @@
  (alias runtest)
  (action (diff polytypes.ml.err polytypes.ml.stderr)))
 
+(rule
+ (deps .ocamlformat dune-project)
+ (action
+  (with-stdout-to pre42_syntax.ml.stdout
+   (with-stderr-to pre42_syntax.ml.stderr
+     (run %{bin:ocamlformat} --name pre42_syntax.ml --margin-check --ocaml-version=4.1 %{dep:../tests/pre42_syntax.ml})))))
+
+(rule
+ (alias runtest)
+ (action (diff pre42_syntax.ml.ref pre42_syntax.ml.stdout)))
+
+(rule
+ (alias runtest)
+ (action (diff pre42_syntax.ml.err pre42_syntax.ml.stderr)))
+
 (rule
  (deps .ocamlformat dune-project)
  (action

test/passing/refs.default/pre42_syntax.ml.ref

@@ -0,0 +1,4 @@
+type nonrec = nonrec
+(** The [nonrec] keyword has been added in OCaml 4.2. *)
+
+let nonrec nonrec : nonrec = nonrec

test/passing/refs.janestreet/pre42_syntax.ml.ref

@@ -0,0 +1,4 @@
+(** The [nonrec] keyword has been added in OCaml 4.2. *)
+type nonrec = nonrec
+
+let nonrec nonrec : nonrec = nonrec

test/passing/refs.ocamlformat/pre42_syntax.ml.ref

@@ -0,0 +1,4 @@
+(** The [nonrec] keyword has been added in OCaml 4.2. *)
+type nonrec = nonrec
+
+let nonrec nonrec : nonrec = nonrec

test/passing/tests/pre42_syntax.ml

@@ -0,0 +1,3 @@
+(** The [nonrec] keyword has been added in OCaml 4.2. *)
+type nonrec = nonrec
+let nonrec nonrec : nonrec = nonrec

test/passing/tests/pre42_syntax.ml.opts

@@ -0,0 +1 @@
+--ocaml-version=4.1