From bd9cda2af7d9fd8064b719e9135b3a48cf13c36a Mon Sep 17 00:00:00 2001
From: sterni <sternenseemann@systemli.org>
Date: Wed, 21 Sep 2022 22:30:39 +0200
Subject: feat(tvix/eval): add builtins.stringLength

Fairly straightforward, only thing of note is that we coerce (weakly) to
string here as well.

Change-Id: I03b427e657e402f1f9eb0f795b689bbf5092aba1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6745
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Reviewed-by: tazjin <tazjin@tvl.su>
---
 tvix/eval/src/builtins/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'tvix/eval/src/builtins')

diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs
index 1a6155a82352..872033648aff 100644
--- a/tvix/eval/src/builtins/mod.rs
+++ b/tvix/eval/src/builtins/mod.rs
@@ -234,6 +234,11 @@ fn pure_builtins() -> Vec<Builtin> {
                 .collect::<Vec<Value>>();
             Ok(Value::List(NixList::construct(parts.len(), parts)))
         }),
+        Builtin::new("stringLength", &[false], |args, vm| {
+            // also forces the value
+            let s = args[0].coerce_to_string(CoercionKind::Weak, vm)?;
+            Ok(Value::Integer(s.as_str().len() as i64))
+        }),
         Builtin::new(
             "sub",
             &[false, false],
-- 
cgit 1.4.1