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authorWilliam Carroll <wpcarro@gmail.com>2022-08-30T00·33-0700
committertazjin <tazjin@tvl.su>2022-09-07T20·56+0000
commit197fe37daef242596900bcab948d6fc14348f910 (patch)
treeae7daee7509d03cd2b18fbc2aa16a61dc28f35f6 /tvix/eval/src/builtins
parent15e2bc54f1beab0f99a7d7199af92a3139052302 (diff)
feat(tvix/eval): Support builtins.length r/4740
Get the length of a list

Change-Id: I41d91e96d833269541a1b3c23b7cc879f96d1e5a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6407
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Diffstat (limited to 'tvix/eval/src/builtins')
-rw-r--r--tvix/eval/src/builtins/mod.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs
index 1a0443cb6012..3c32129e0537 100644
--- a/tvix/eval/src/builtins/mod.rs
+++ b/tvix/eval/src/builtins/mod.rs
@@ -45,6 +45,9 @@ fn pure_builtins() -> Vec<Builtin> {
             let a = args.pop().unwrap();
             Ok(arithmetic_op!(a, b, /))
         }),
+        Builtin::new("length", 1, |args| {
+            Ok(Value::Integer(args[0].as_list()?.len() as i64))
+        }),
         Builtin::new("isAttrs", 1, |args| {
             Ok(Value::Bool(matches!(args[0], Value::Attrs(_))))
         }),