feat: mark selected public enums as #[non_exhaustive] (part of #1016) (#1040)

- lambda-events (dynamodb): StreamViewType, StreamStatus, SharedIteratorType, OperationType, KeyType
- lambda-http: PayloadError, JsonPayloadError, FormUrlEncodedPayloadError

These enums are likely to grow; marking them non_exhaustive helps avoid semver hazards for downstream consumers who pattern-match exhaustively.

Author: cnaples79

lambda-events/src/event/dynamodb/mod.rs

@@ -13,6 +13,7 @@ use std::fmt;
 mod attributes;
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
+#[non_exhaustive]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum StreamViewType {
     NewImage,
@@ -35,6 +36,7 @@ impl fmt::Display for StreamViewType {
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
+#[non_exhaustive]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum StreamStatus {
     Enabling,
@@ -57,6 +59,7 @@ impl fmt::Display for StreamStatus {
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
+#[non_exhaustive]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum SharedIteratorType {
     TrimHorizon,
@@ -79,6 +82,7 @@ impl fmt::Display for SharedIteratorType {
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize)]
+#[non_exhaustive]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum OperationType {
     #[default]
@@ -99,6 +103,7 @@ impl fmt::Display for OperationType {
 }
 
 #[derive(Clone, Default, Debug, Deserialize, Eq, PartialEq, Serialize)]
+#[non_exhaustive]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum KeyType {
     #[default]

lambda-http/src/ext/request.rs

@@ -13,6 +13,7 @@ use crate::Body;
 ///
 /// Returned by [`RequestPayloadExt::payload()`]
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum PayloadError {
     /// Returned when `application/json` bodies fail to deserialize a payload
     Json(serde_json::Error),
@@ -22,13 +23,15 @@ pub enum PayloadError {
 
 /// Indicates a problem processing a JSON payload.
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum JsonPayloadError {
     /// Problem deserializing a JSON payload.
     Parsing(serde_json::Error),
 }
 
 /// Indicates a problem processing an x-www-form-urlencoded payload.
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum FormUrlEncodedPayloadError {
     /// Problem deserializing an x-www-form-urlencoded payload.
     Parsing(SerdeError),