AK+LibJS: Simplify MUST() and move it from LibJS to AK/Try.h

This is generally useful so let's move it to AK. Also it seems that we
don't need the temporary variable hack anymore, so let's lose that.

1 files changed, 7 insertions, 0 deletions

diff --git a/AK/Try.h b/AK/Try.h
index 15d470e86b..8db09a950a 100644
--- a/AK/Try.h
+++ b/AK/Try.h
@@ -16,3 +16,10 @@
             return _temporary_result.release_error(); \
         _temporary_result.release_value();            \
     })
+
+#define MUST(expression)                       \
+    ({                                         \
+        auto _temporary_result = (expression); \
+        VERIFY(!_temporary_result.is_error()); \
+        _temporary_result.release_value();     \
+    })