From c39c73006d9f954cb9b52285a9cd598f65b896b7 Mon Sep 17 00:00:00 2001
From: Camelid <camelidcamel@gmail.com>
Date: Wed, 28 Oct 2020 13:49:53 -0700
Subject: [PATCH] Return `impl Iterator` instead of `Vec`

---
 src/config.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/config.rs b/src/config.rs
index f08a9aac19b..e00095d3caa 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -364,12 +364,14 @@ impl Cfg {
         Toolchain::from(self, name)
     }
 
-    pub fn get_toolchains_from_regex(&self, regex: Regex) -> Result<Vec<Toolchain<'_>>> {
+    pub fn get_toolchains_from_regex(
+        &self,
+        regex: Regex,
+    ) -> Result<impl Itererator<Item = Toolchain<'_>>> {
         Ok(self
             .list_toolchains_iter()?
             .filter(|toolchain| regex.is_match(toolchain))
-            .map(|toolchain| Toolchain::from(self, &toolchain).unwrap())
-            .collect())
+            .map(|toolchain| Toolchain::from(self, &toolchain).unwrap()))
     }
 
     pub fn verify_toolchain(&self, name: &str) -> Result<Toolchain<'_>> {