Return Option<Iterator<Item = #v_ty>>

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams"
 description = "Activity Streams in Rust"
-version = "0.5.0-alpha.3"
+version = "0.5.0-alpha.4"
 license = "GPL-3.0"
 authors = ["asonix <asonix@asonix.dog>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
@@ -17,7 +17,7 @@ primitives = ["chrono", "mime", "serde", "thiserror", "url"]
 types = ["derive", "kinds", "primitives", "serde", "serde_json"]
 
 [dependencies]
-activitystreams-derive = { version = "0.5.0-alpha.2", path = "activitystreams-derive", optional = true}
+activitystreams-derive = { version = "0.5.0-alpha.3", path = "activitystreams-derive", optional = true}
 chrono = { version = "0.4", optional = true }
 mime = { version = "0.3", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }

README.md

@@ -9,7 +9,7 @@ __A set of Traits and Types that make up the ActivityStreams and ActivityPub spe
 
 First, add ActivityStreams to your dependencies
 ```toml
-activitystreams = "0.5.0-alpha.3"
+activitystreams = "0.5.0-alpha.4"
 ```
 
 ### Types
@@ -177,7 +177,7 @@ There are a number of features that can be disabled in this crate. By default, e
 enabled.
 
 ```toml
-activitystreams = { version = "0.5.0-alpha.0", default-features = "false", features = ["derive"] }
+activitystreams = { version = "0.5.0-alpha.4", default-features = "false", features = ["derive"] }
 ```
 
 | feature    | what you get                                              |

activitystreams-derive/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams-derive"
 description = "Derive macros for activitystreams"
-version = "0.5.0-alpha.2"
+version = "0.5.0-alpha.3"
 license = "GPL-3.0"
 authors = ["asonix <asonix.dev@gmail.com>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"

activitystreams-derive/README.md

@@ -10,7 +10,7 @@ Add the required crates to your `Cargo.toml`
 ```toml
 # Cargo.toml
 
-activitystreams = "0.5.0-alpha.3"
+activitystreams = "0.5.0-alpha.4"
 serde = { version = "1.0", features = ["derive"] }
 ```
 

activitystreams-derive/src/lib.rs

@@ -23,8 +23,8 @@
 //!
 //! First, add `serde` and `activitystreams-derive` to your Cargo.toml
 //! ```toml
-//! activitystreams-derive = "0.5.0-alpha.2"
+//! activitystreams-derive = "0.5.0-alpha.3"
-//! # or activitystreams = "0.5.0-alpha.3"
+//! # or activitystreams = "0.5.0-alpha.4"
 //! serde = { version = "1.0", features = ["derive"] }
 //! ```
 //!
@@ -1060,12 +1060,12 @@ pub fn properties(tokens: TokenStream) -> TokenStream {
                             ///
                             /// The returned vec will be empty if no values match the requested
                             /// type, but values are present.
-                            pub fn #get_many_ident(&self) -> Option<Vec<&#v_ty>> {
+                            pub fn #get_many_ident(&self) -> Option<impl Iterator<Item = &#v_ty>> {
                                 match self.#fname {
                                     #ty::Array(ref array) => Some(array.iter().filter_map(|i| match i {
                                         #term_ty::#v_ty(item) => Some(item),
                                         _ => None,
-                                    }).collect()),
+                                    })),
                                     _ => None,
                                 }
                             }
@@ -1130,12 +1130,12 @@ pub fn properties(tokens: TokenStream) -> TokenStream {
                             /// This returns `None` if
                             /// - There is no value present
                             /// - There is only one value present
-                            pub fn #get_many_ident(&self) -> Option<Vec<&#v_ty>> {
+                            pub fn #get_many_ident(&self) -> Option<impl Iterator<Item = &#v_ty>> {
                                 match self.#fname {
                                     Some(#ty::Array(ref array)) => Some(array.iter().filter_map(|i| match i {
                                         #term_ty::#v_ty(item) => Some(item),
                                         _ => None,
-                                    }).collect()),
+                                    })),
                                     _ => None,
                                 }
                             }

examples/de.rs

@@ -1,5 +1,5 @@
 use activitystreams::{
-    collection::apub::OrderedCollection,
+    collection::{apub::OrderedCollection, properties::CollectionProperties},
     object::{streams::Page, ObjectBox},
 };
 use anyhow::Error;
@@ -51,5 +51,14 @@ fn main() -> Result<(), Error> {
     let collection: OrderedCollection = serde_json::from_str(collection_json)?;
     println!("{:#?}", collection);
 
+    let cprops: &CollectionProperties = collection.as_ref();
+    let v: Vec<Page> = cprops
+        .get_many_items_object_boxs()
+        .unwrap()
+        .map(|object_box| object_box.clone().to_concrete::<Page>())
+        .collect::<Result<Vec<_>, std::io::Error>>()?;
+
+    println!("{:#?}", v);
+
     Ok(())
 }

src/lib.rs

@@ -25,7 +25,7 @@
 //!
 //! First, add ActivityStreams to your dependencies
 //! ```toml
-//! activitystreams = "0.5.0-alpha.3"
+//! activitystreams = "0.5.0-alpha.4"
 //! ```
 //!
 //! ### Types
@@ -193,7 +193,7 @@
 //! enabled.
 //!
 //! ```toml
-//! activitystreams = { version = "0.5.0-alpha.3", default-features = "false", features = ["derive"] }
+//! activitystreams = { version = "0.5.0-alpha.4", default-features = "false", features = ["derive"] }
 //! ```
 //!
 //! | feature    | what you get                                              |

src/object/mod.rs

@@ -53,6 +53,7 @@ pub struct AnyImage {
     rest: std::collections::HashMap<String, serde_json::Value>,
 }
 
+#[cfg(feature = "types")]
 impl AnyImage {
     pub fn from_concrete<T>(t: T) -> Result<Self, serde_json::Error>
     where