Use slices as return types

Author: utpilla

opentelemetry-sdk/src/logs/log_emitter.rs

@@ -92,7 +92,7 @@ impl LoggerProvider {
     }
 
     /// Log processors associated with this provider.
-    pub fn log_processors(&self) -> &Vec<Box<dyn LogProcessor>> {
+    pub fn log_processors(&self) -> &[Box<dyn LogProcessor>] {
         &self.inner.processors
     }
 

opentelemetry-sdk/src/trace/provider.rs

@@ -62,7 +62,7 @@ impl TracerProvider {
     }
 
     /// Span processors associated with this provider
-    pub fn span_processors(&self) -> &Vec<Box<dyn SpanProcessor>> {
+    pub fn span_processors(&self) -> &[Box<dyn SpanProcessor>] {
         &self.inner.processors
     }
 

opentelemetry-sdk/src/trace/span.rs

@@ -219,7 +219,7 @@ impl Span {
             data.end_time = opentelemetry::time::now();
         }
 
-        match provider.span_processors().as_slice() {
+        match provider.span_processors() {
             [] => {}
             [processor] => {
                 processor.on_end(build_export_data(