From 48a80250bcb6104feba1ef16f6838cccccaa9626 Mon Sep 17 00:00:00 2001
From: Markus Freitag <fmarkus@mailbox.org>
Date: Fri, 9 Dec 2022 18:52:31 +0100
Subject: [PATCH 1/2] evaluator: add break support for while loops

---
 evaluator/while.go   |  5 +++++
 tests/while.expected |  4 ++++
 tests/while.rl       | 18 +++++++++++++++++-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/evaluator/while.go b/evaluator/while.go
index c069e83..58ce50c 100644
--- a/evaluator/while.go
+++ b/evaluator/while.go
@@ -14,6 +14,11 @@ func evalWhile(w *ast.While, env *object.Environment) object.Object {
 		if rt != nil && (rt.Type() == object.RETURN_VALUE_OBJ || rt.Type() == object.ERROR_OBJ) {
 			return rt
 		}
+
+		if rt != nil && rt.Type() == object.BREAK_VALUE_OBJ {
+			return rt.(*object.BreakValue).Value
+		}
+
 		v = Eval(w.Condition, env)
 	}
 
diff --git a/tests/while.expected b/tests/while.expected
index a9d4dd4..3674bf4 100644
--- a/tests/while.expected
+++ b/tests/while.expected
@@ -3,5 +3,9 @@
 2
 0
 1
+3
+4
+5
+6
 0
 ERROR: division by zero not allowed
diff --git a/tests/while.rl b/tests/while.rl
index 76e56bc..a2964e1 100644
--- a/tests/while.rl
+++ b/tests/while.rl
@@ -17,6 +17,21 @@ def test_one()
 end
 
 def test_two()
+  i = 0
+  while (i < 10)
+    if (i < 3)
+      i = i + 1
+      next
+    end
+    puts(i)
+    if (i == 6)
+      break
+    end
+    i = i + 1
+  end
+end
+
+def test_three()
   a = 0
   while (a != 3)
     puts(a)
@@ -25,4 +40,5 @@ def test_two()
 end
 
 test_one()
-test_two()
\ No newline at end of file
+test_two()
+test_three()

From 99a4fd7d4c67e0b5cbc241847f2b7e669007b6db Mon Sep 17 00:00:00 2001
From: Flipez <code@brauser.io>
Date: Sun, 18 Dec 2022 13:41:01 +0100
Subject: [PATCH 2/2] Update docs

Signed-off-by: Flipez <code@brauser.io>
---
 docs/docs/control_expressions/while.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/docs/docs/control_expressions/while.md b/docs/docs/control_expressions/while.md
index 4f79aad..480c60a 100644
--- a/docs/docs/control_expressions/while.md
+++ b/docs/docs/control_expressions/while.md
@@ -23,3 +23,26 @@ end
 3
 => nil
 ```
+
+It is possible to use `next` or `break` inside a while loop.
+
+```js
+i = 0
+while (i < 10)
+  if (i < 3)
+    i = i + 1
+    next
+  end
+  puts(i)
+  if (i == 6)
+    break
+  end
+  i = i + 1
+end
+
+// which prints
+3
+4
+5
+6
+```
\ No newline at end of file