feat: implement for-in loop syntax with iterate/iteratorValue protocol and break support

Add `for (variable in sequence)` syntax to the Wren language, introducing the `in` keyword token and compiler support for iterating over sequences using `iterate` and `iteratorValue` methods. Includes new benchmark files for Lua, Python, Ruby, and Wren, plus test cases covering single-expression bodies, block bodies, closures over loop variables, and break statements. Also fixes a missing POP() in CLOSE_UPVALUE and moves the while test file to a subdirectory.
2013-12-25 05:04:11 +00:00
parent c58f15fc87
commit ad559eabd3
18 changed files with 404 additions and 163 deletions
@@ -26,8 +26,8 @@ Some people like to see all of the reserved words in a programming language in
 one lump. If you're one of those folks, here you go:

    :::wren
-    class else false fn for if is null
-    return static this true var while
+    break class else false fn for if in is
+    null return static this true var while

 ## Statement terminators