Pull in RustPython parser (#6099)

crates/ruff_text_size/src/serde_impls.rs

@@ -0,0 +1,47 @@
+use {
+    crate::{TextRange, TextSize},
+    serde::{de, Deserialize, Deserializer, Serialize, Serializer},
+};
+
+impl Serialize for TextSize {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.raw.serialize(serializer)
+    }
+}
+
+impl<'de> Deserialize<'de> for TextSize {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        u32::deserialize(deserializer).map(TextSize::from)
+    }
+}
+
+impl Serialize for TextRange {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        (self.start(), self.end()).serialize(serializer)
+    }
+}
+
+impl<'de> Deserialize<'de> for TextRange {
+    #[allow(clippy::nonminimal_bool)]
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let (start, end) = Deserialize::deserialize(deserializer)?;
+        if !(start <= end) {
+            return Err(de::Error::custom(format!(
+                "invalid range: {start:?}..{end:?}"
+            )));
+        }
+        Ok(TextRange::new(start, end))
+    }
+}