1 files changed, 15 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/json.rs b/compiler/rustc_target/src/json.rs
index 4fcc477921b..896609bdbe3 100644
--- a/compiler/rustc_target/src/json.rs
+++ b/compiler/rustc_target/src/json.rs
@@ -114,3 +114,18 @@ impl ToJson for rustc_abi::CanonAbi {
         self.to_string().to_json()
     }
 }
+
+macro_rules! serde_deserialize_from_str {
+    ($ty:ty) => {
+        impl<'de> serde::Deserialize<'de> for $ty {
+            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+            where
+                D: serde::Deserializer<'de>,
+            {
+                let s = String::deserialize(deserializer)?;
+                FromStr::from_str(&s).map_err(serde::de::Error::custom)
+            }
+        }
+    };
+}
+pub(crate) use serde_deserialize_from_str;