From e20f6b69a44c79a44031209586ed06c4b6c8f42f Mon Sep 17 00:00:00 2001
From: Garrit Franke <garritfranke@gmail.com>
Date: Thu, 10 Dec 2020 23:30:35 +0100
Subject: [PATCH] Add reverse function to stdlib

---
 examples/playground.sb |  6 +++---
 lib/stdio.sb           | 18 ++++++++++++++++++
 src/parser/tests.rs    | 14 ++++++++++++++
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/examples/playground.sb b/examples/playground.sb
index 9f41721..83f0d66 100644
--- a/examples/playground.sb
+++ b/examples/playground.sb
@@ -1,5 +1,5 @@
 fn main() {
-    let x = 10
-    x = 5
-    println("Hello World!")
+    let arr = [1, 2, 3, 4, 5]
+
+    println(rev(arr))
 }
diff --git a/lib/stdio.sb b/lib/stdio.sb
index 966a8b8..d135d76 100644
--- a/lib/stdio.sb
+++ b/lib/stdio.sb
@@ -17,4 +17,22 @@ fn len(arr) {
     }
 
     return c
+}
+
+// Reverses an array
+// TODO: fix me!
+fn rev(arr) {
+
+    let l = len(arr)
+    let new_arr = []
+
+    let i = 0
+    let j = l
+    while i < l {
+        new_arr[i] = arr[j]
+        i = i - 1
+        j = j - 1
+    }
+
+    return new_arr
 }
\ No newline at end of file
diff --git a/src/parser/tests.rs b/src/parser/tests.rs
index 255db51..ace0393 100644
--- a/src/parser/tests.rs
+++ b/src/parser/tests.rs
@@ -554,3 +554,17 @@ fn test_function_multiple_args() {
     let tree = parse(tokens, Some(raw.to_string()));
     assert!(tree.is_ok())
 }
+
+#[test]
+#[ignore]
+fn test_array_position_assignment() {
+    let raw = "
+    fn main() {
+        new_arr[i] = arr[j]
+    }
+    }
+    ";
+    let tokens = tokenize(raw);
+    let tree = parse(tokens, Some(raw.to_string()));
+    assert!(tree.is_ok())
+}