added: `core.alloc.arena.auto_temp()`

diff --git a/core/alloc/arena.onyx b/core/alloc/arena.onyx
index 13e91135f7ce93b1108b6cdf55ec6dcca7e13dfa..d9ef2a473196431bdd8da0e5468930dfa9d8a195 100644 (file)
--- a/core/alloc/arena.onyx
+++ b/core/alloc/arena.onyx
@@ -181,3 +181,16 @@ auto :: #match {
         return 0;
     }
 }
+
+auto_temp :: macro (body: Code) -> i32 {
+    use core.alloc {arena, heap_allocator}
+    a := arena.make(heap_allocator, 32 * 1024);
+
+    old_allocator := context.temp_allocator;
+    context.temp_allocator = arena.make_allocator(&a);
+
+    #unquote body;
+
+    arena.free(&a);
+    context.temp_allocator = old_allocator;
+}