Quoted style for string consisting of digits with leading zero

dtolnay · Jul 20, 2023 · a38768f · a38768f
1 parent cd1fd90
commit a38768f
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Showing 2 changed files with 7 additions and 3 deletions.
diff --git a/src/ser.rs b/src/ser.rs
@@ -339,8 +339,12 @@ where
                 Ok(ScalarStyle::SingleQuoted)
             }
 
-            fn visit_str<E>(self, _v: &str) -> Result<Self::Value, E> {
-                Ok(ScalarStyle::Any)
+            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> {
+                Ok(if crate::de::digits_but_not_number(v) {
+                    ScalarStyle::SingleQuoted
+                } else {
+                    ScalarStyle::Any
+                })
             }
 
             fn visit_unit<E>(self) -> Result<Self::Value, E> {

diff --git a/tests/test_serde.rs b/tests/test_serde.rs
@@ -311,7 +311,7 @@ fn test_strings_needing_quote() {
         boolean: 'true'
         integer: '1'
         void: 'null'
-        leading_zeros: 007
+        leading_zeros: '007'
     "#};
     test_serde(&thing, yaml);
 }