Function front now returns Option

TonalidadeHidrica · TonalidadeHidrica · commit ec7afe0ea315 · 2020-09-11T15:25:27.000+09:00
diff --git a/src/internal_queue.rs b/src/internal_queue.rs
@@ -26,8 +26,12 @@ impl<T> SimpleQueue<T> {
     }
 
     // Do we need mutable version?
-    pub(crate) fn front(&self) -> &T {
-        &self.payload[self.pos]
+    pub(crate) fn front(&self) -> Option<&T> {
+        if self.pos < self.payload.len() {
+            Some(&self.payload[self.pos])
+        } else {
+            None
+        }
     }
 
     pub(crate) fn clear(&mut self) {

Original file line number	Diff line number	Diff line change
`@@ -26,8 +26,12 @@ impl<T> SimpleQueue<T> {`
`26`	`26`	`}`
`27`	`27`
`28`	`28`	`// Do we need mutable version?`
`29`		`- pub(crate) fn front(&self) -> &T {`
`30`		`- &self.payload[self.pos]`
	`29`	`+ pub(crate) fn front(&self) -> Option<&T> {`
	`30`	`+ if self.pos < self.payload.len() {`
	`31`	`+ Some(&self.payload[self.pos])`
	`32`	`+ } else {`
	`33`	`+ None`
	`34`	`+ }`
`31`	`35`	`}`
`32`	`36`
`33`	`37`	`pub(crate) fn clear(&mut self) {`