Progress on syncblock macro

oxydsp-flowgraph/src/block.rs

@@ -1,7 +1,6 @@
-use crate::{
-    edge::BlockIOIndex,
-    io::{AnonymousStreamConsumer, AnonymousStreamProducer},
-};
+use crate::edge::BlockIOIndex;
+use crate::io::AnonymousStreamConsumer;
+use crate::io::AnonymousStreamProducer;
 
 pub enum BlockResult
 {
@@ -51,14 +50,14 @@ pub trait Block
 
 // Represents the input, output, state types
 // that a SyncBlock will have to interacti with
-pub trait SyncBlockIO
+pub trait SyncBlockIO<'view>
 {
     type StateView;
     type Input;
     type Output;
 }
 
-pub trait SyncBlock: SyncBlockIO
+pub trait SyncBlock<'view>: SyncBlockIO<'view>
 {
     fn sync_work(state: Self::StateView, input: Self::Input) -> Option<Self::Output>;
 }

oxydsp-flowgraph/src/tag.rs

@@ -1,9 +1,9 @@
-use std::{
-    any::Any,
-    collections::HashMap,
-    ops::{Deref, DerefMut},
-    sync::{Arc, Mutex},
-};
+use std::any::Any;
+use std::collections::HashMap;
+use std::ops::Deref;
+use std::ops::DerefMut;
+use std::sync::Arc;
+use std::sync::Mutex;
 
 // Tags a particular sample within a specific stream
 #[derive(Clone)]
@@ -20,6 +20,19 @@ pub struct Tag
     pub data: Arc<Mutex<HashMap<String, Arc<dyn Any + Send + Sync>>>>,
 }
 
+impl Tag
+{
+    pub fn merge_tag_opts<const N: usize>(tag_opts: [Option<Tag>; N]) -> Option<Tag>
+    {
+        let mut out_tag = None;
+        for tag in tag_opts.iter()
+        {
+            out_tag = out_tag.merge(tag);
+        }
+        out_tag
+    }
+}
+
 pub trait TagValue: Clone {}
 impl<T> TagValue for T where T: Clone {}