6 files changed, 185 insertions, 2 deletions
diff --git a/tests/lean/misc-external/External.lean b/tests/lean/External.lean
index b95db309..b95db309 100644
--- a/tests/lean/misc-external/External.lean
+++ b/tests/lean/External.lean
diff --git a/tests/lean/External/Funs.lean b/tests/lean/External/Funs.lean
new file mode 100644
index 00000000..674aaebd
--- /dev/null
+++ b/tests/lean/External/Funs.lean
@@ -0,0 +1,88 @@
+-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
+-- [external]: function definitions
+import Base
+import External.Types
+import External.FunsExternal
+open Primitives
+namespace external
+
+/- [external::swap]: forward function -/
+def swap (T : Type) (x : T) (y : T) (st : State) : Result (State × Unit) :=
+  do
+    let (st0, _) ← core.mem.swap T x y st
+    let (st1, _) ← core.mem.swap_back0 T x y st st0
+    let (st2, _) ← core.mem.swap_back1 T x y st st1
+    Result.ret (st2, ())
+
+/- [external::swap]: backward function 0 -/
+def swap_back
+  (T : Type) (x : T) (y : T) (st : State) (st0 : State) :
+  Result (State × (T × T))
+  :=
+  do
+    let (st1, _) ← core.mem.swap T x y st
+    let (st2, x0) ← core.mem.swap_back0 T x y st st1
+    let (_, y0) ← core.mem.swap_back1 T x y st st2
+    Result.ret (st0, (x0, y0))
+
+/- [external::test_new_non_zero_u32]: forward function -/
+def test_new_non_zero_u32
+  (x : U32) (st : State) : Result (State × core.num.nonzero.NonZeroU32) :=
+  do
+    let (st0, opt) ← core.num.nonzero.NonZeroU32.new x st
+    core.option.Option.unwrap core.num.nonzero.NonZeroU32 opt st0
+
+/- [external::test_vec]: forward function -/
+def test_vec : Result Unit :=
+  do
+    let v := Vec.new U32
+    let _ ← Vec.push U32 v (U32.ofInt 0)
+    Result.ret ()
+
+/- Unit test for [external::test_vec] -/
+#assert (test_vec == .ret ())
+
+/- [external::custom_swap]: forward function -/
+def custom_swap
+  (T : Type) (x : T) (y : T) (st : State) : Result (State × T) :=
+  do
+    let (st0, _) ← core.mem.swap T x y st
+    let (st1, x0) ← core.mem.swap_back0 T x y st st0
+    let (st2, _) ← core.mem.swap_back1 T x y st st1
+    Result.ret (st2, x0)
+
+/- [external::custom_swap]: backward function 0 -/
+def custom_swap_back
+  (T : Type) (x : T) (y : T) (st : State) (ret0 : T) (st0 : State) :
+  Result (State × (T × T))
+  :=
+  do
+    let (st1, _) ← core.mem.swap T x y st
+    let (st2, _) ← core.mem.swap_back0 T x y st st1
+    let (_, y0) ← core.mem.swap_back1 T x y st st2
+    Result.ret (st0, (ret0, y0))
+
+/- [external::test_custom_swap]: forward function -/
+def test_custom_swap
+  (x : U32) (y : U32) (st : State) : Result (State × Unit) :=
+  do
+    let (st0, _) ← custom_swap U32 x y st
+    Result.ret (st0, ())
+
+/- [external::test_custom_swap]: backward function 0 -/
+def test_custom_swap_back
+  (x : U32) (y : U32) (st : State) (st0 : State) :
+  Result (State × (U32 × U32))
+  :=
+  custom_swap_back U32 x y st (U32.ofInt 1) st0
+
+/- [external::test_swap_non_zero]: forward function -/
+def test_swap_non_zero (x : U32) (st : State) : Result (State × U32) :=
+  do
+    let (st0, _) ← swap U32 x (U32.ofInt 0) st
+    let (st1, (x0, _)) ← swap_back U32 x (U32.ofInt 0) st st0
+    if x0 = (U32.ofInt 0)
+    then Result.fail Error.panic
+    else Result.ret (st1, x0)
+
+end external
diff --git a/tests/lean/External/FunsExternal.lean b/tests/lean/External/FunsExternal.lean
new file mode 100644
index 00000000..aae11ba1
--- /dev/null
+++ b/tests/lean/External/FunsExternal.lean
@@ -0,0 +1,33 @@
+-- [external]: templates for the external functions.
+import Base
+import External.Types
+open Primitives
+open external
+
+-- TODO: fill those bodies
+
+/- [core::mem::swap] -/
+def core.mem.swap
+  (T : Type) : T → T → State → Result (State × Unit) :=
+  fun _x _y s => .ret (s, ())
+
+/- [core::mem::swap] -/
+def core.mem.swap_back0
+  (T : Type) : T → T → State → State → Result (State × T) :=
+  fun _x y _s0 s1 => .ret (s1, y)
+
+/- [core::mem::swap] -/
+def core.mem.swap_back1
+  (T : Type) : T → T → State → State → Result (State × T) :=
+  fun x _y _s0 s1 => .ret (s1, x)
+
+/- [core::num::nonzero::NonZeroU32::{14}::new] -/
+def core.num.nonzero.NonZeroU32.new
+  :
+  U32 → State → Result (State × (Option core_num_nonzero_non_zero_u32_t)) :=
+  fun _ _ => .fail .panic
+
+/- [core::option::Option::{0}::unwrap] -/
+def core.option.Option.unwrap
+  (T : Type) : Option T → State → Result (State × T) :=
+  fun _ _ => .fail .panic
diff --git a/tests/lean/External/FunsExternal_Template.lean b/tests/lean/External/FunsExternal_Template.lean
new file mode 100644
index 00000000..c8bc397f
--- /dev/null
+++ b/tests/lean/External/FunsExternal_Template.lean
@@ -0,0 +1,27 @@
+-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
+-- [external]: external functions.
+-- This is a template file: rename it to "FunsExternal.lean" and fill the holes.
+import Base
+import External.Types
+open Primitives
+open external
+
+/- [core::mem::swap]: forward function -/
+axiom core.mem.swap (T : Type) : T → T → State → Result (State × Unit)
+
+/- [core::mem::swap]: backward function 0 -/
+axiom core.mem.swap_back0
+  (T : Type) : T → T → State → State → Result (State × T)
+
+/- [core::mem::swap]: backward function 1 -/
+axiom core.mem.swap_back1
+  (T : Type) : T → T → State → State → Result (State × T)
+
+/- [core::num::nonzero::NonZeroU32::{14}::new]: forward function -/
+axiom core.num.nonzero.NonZeroU32.new
+  : U32 → State → Result (State × (Option core.num.nonzero.NonZeroU32))
+
+/- [core::option::Option::{0}::unwrap]: forward function -/
+axiom core.option.Option.unwrap
+  (T : Type) : Option T → State → Result (State × T)
+
diff --git a/tests/lean/External/Opaque.lean b/tests/lean/External/Opaque.lean
new file mode 100644
index 00000000..d0297523
--- /dev/null
+++ b/tests/lean/External/Opaque.lean
@@ -0,0 +1,32 @@
+-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
+-- [external]: opaque function definitions
+import Base
+import External.Types
+open Primitives
+
+namespace external
+
+structure OpaqueDefs where
+  
+  /- [core::mem::swap] -/
+  core.mem.swap_fwd (T : Type) : T → T → State → Result (State × Unit)
+  
+  /- [core::mem::swap] -/
+  core.mem.swap_back0
+    (T : Type) : T → T → State → State → Result (State × T)
+  
+  /- [core::mem::swap] -/
+  core.mem.swap_back1
+    (T : Type) : T → T → State → State → Result (State × T)
+  
+  /- [core::num::nonzero::NonZeroU32::{14}::new] -/
+  core.num.nonzero.NonZeroU32.new_fwd
+    :
+    U32 → State → Result (State × (Option
+      core_num_nonzero_non_zero_u32_t))
+  
+  /- [core::option::Option::{0}::unwrap] -/
+  core.option.Option.unwrap_fwd
+    (T : Type) : Option T → State → Result (State × T)
+  
+end external
diff --git a/tests/lean/misc-external/External/Types.lean b/tests/lean/External/Types.lean
index ed1842be..ba984e2a 100644
--- a/tests/lean/misc-external/External/Types.lean
+++ b/tests/lean/External/Types.lean
@@ -1,10 +1,13 @@
 -- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
 -- [external]: type definitions
-import Base.Primitives
+import Base
+open Primitives
+namespace external
 
 /- [core::num::nonzero::NonZeroU32] -/
-axiom core_num_nonzero_non_zero_u32_t : Type
+axiom core.num.nonzero.NonZeroU32 : Type
 
 /- The state type used in the state-error monad -/
 axiom State : Type
 
+end external