From 911fb96eca84a3059ecc11af9c3ac6fdacc28166 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <mail@tazj.in>
Date: Mon, 15 Aug 2022 01:13:02 +0300
Subject: [PATCH] feat(tvix/eval): add Value::as_attrs method

Change-Id: I2f39122ac85b67837335aab308d845907160e132
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6221
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
---
 tvix/eval/src/value/mod.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tvix/eval/src/value/mod.rs b/tvix/eval/src/value/mod.rs
index f0cc86eed..6c0473fa6 100644
--- a/tvix/eval/src/value/mod.rs
+++ b/tvix/eval/src/value/mod.rs
@@ -62,6 +62,16 @@ impl Value {
         }
     }
 
+    pub fn as_attrs(&self) -> EvalResult<&NixAttrs> {
+        match self {
+            Value::Attrs(attrs) => Ok(attrs),
+            other => Err(Error::TypeError {
+                expected: "set",
+                actual: other.type_of(),
+            }),
+        }
+    }
+
     pub fn to_string(self) -> EvalResult<NixString> {
         match self {
             Value::String(s) => Ok(s),