add some basic list tests

nac3standalone/demo/demo.rs

@@ -1,3 +1,24 @@
+mod cslice {  // copied from https://github.com/dherman/cslice
+    use std::marker::PhantomData;
+    use std::slice;
+
+    #[repr(C)]
+    #[derive(Clone, Copy)]
+    pub struct CSlice<'a, T> {
+        base: *const T,
+        len: usize,
+        marker: PhantomData<&'a ()>
+    }
+
+    impl<'a, T> AsRef<[T]> for CSlice<'a, T> {
+        fn as_ref(&self) -> &[T] {
+            unsafe {
+                slice::from_raw_parts(self.base, self.len)
+            }
+        }
+    }
+}
+
 #[no_mangle]
 pub extern "C" fn output_int32(x: i32) {
     println!("{}", x);
@@ -18,6 +39,21 @@ pub extern "C" fn output_asciiart(x: i32) {
     }
 }
 
+#[no_mangle]
+pub extern "C" fn output_int32_list(x: &cslice::CSlice<i32>) {
+    print!("[");
+    let mut it = x.as_ref().iter().peekable();
+    while let Some(e) = it.next()  {
+        if it.peek().is_none() {
+            print!("{}", e);
+        } else {
+            print!("{}, ", e);
+        }
+    }
+    println!("]");
+}
+
+
 extern "C" {
     fn run() -> i32;
 }

nac3standalone/demo/interpret_demo.py

@@ -19,9 +19,7 @@ def patch(module):
         name = fun.__name__
         if name == "output_asciiart":
             return output_asciiart
-        elif name == "output_int32":
-            return print
-        elif name == "output_int64":
+        elif name in {"output_int32", "output_int64", "output_int32_list"}:
             return print
         else:
             raise NotImplementedError

nac3standalone/demo/src/lists.py

@@ -0,0 +1,20 @@
+@extern
+def output_int32_list(x: list[int32]):
+    ...
+
+def run() -> int32:
+    data = [0, 1, 2, 3]
+
+    output_int32_list(data[2:3])
+    output_int32_list(data[:])
+    output_int32_list(data[1:])
+    output_int32_list(data[:-1])
+
+    m1 = -1
+    output_int32_list(data[::m1])
+    output_int32_list(data[:0:m1])
+
+    m2 = -2
+    output_int32_list(data[m2::m1])
+
+    return 0