Make creating AllAstNodeIter explicit.

This is to remove the ambiguity between calling iter on the specific structs like Document and calling iter on an AstNode by having an explicitly-named function to create the iterator.

src/iter/all_ast_node_iter.rs

@@ -90,12 +90,11 @@ impl<'r, 's> Iterator for AllAstNodeIter<'r, 's> {
     }
 }
 
-impl<'r, 's> IntoIterator for AstNode<'r, 's> {
-    type Item = AstNode<'r, 's>;
-
-    type IntoIter = AllAstNodeIter<'r, 's>;
-
-    fn into_iter(self) -> Self::IntoIter {
+impl<'r, 's> AstNode<'r, 's> {
+    /// Iterate all AST nodes.
+    ///
+    /// This is different from the iter/into_iter functions which iterate a single level of the children. This iterates the entire tree including returning the root node itself.
+    pub fn iter_all_ast_nodes(self) -> AllAstNodeIter<'r, 's> {
         AllAstNodeIter {
             root: Some(self),
             queue: VecDeque::new(),

src/parser/document.rs

@@ -143,7 +143,7 @@ fn document_org_source<'b, 'g, 'r, 's>(
     {
         // If there are radio targets in this document then we need to parse the entire document again with the knowledge of the radio targets.
         let all_radio_targets: Vec<&Vec<Object<'_>>> = Into::<AstNode>::into(&document)
-            .into_iter()
+            .iter_all_ast_nodes()
             .filter_map(|ast_node| {
                 if let AstNode::RadioTarget(ast_node) = ast_node {
                     Some(ast_node)

src/parser/in_buffer_settings.rs

@@ -157,7 +157,7 @@ pub(crate) fn apply_in_buffer_settings<'g, 's, 'sf>(
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
 pub(crate) fn apply_post_parse_in_buffer_settings<'g, 's, 'sf>(document: &mut Document<'s>) {
     document.category = Into::<AstNode>::into(&*document)
-        .into_iter()
+        .iter_all_ast_nodes()
         .filter_map(|ast_node| {
             if let AstNode::Keyword(ast_node) = ast_node {
                 if ast_node.key.eq_ignore_ascii_case("category") {

src/types/mod.rs

@@ -13,7 +13,7 @@ pub use affiliated_keyword::AffiliatedKeyword;
 pub use affiliated_keyword::AffiliatedKeywordValue;
 pub use affiliated_keyword::AffiliatedKeywords;
 pub use affiliated_keyword::GetAffiliatedKeywords;
-pub(crate) use ast_node::AstNode;
+pub use ast_node::AstNode;
 pub use document::Document;
 pub use document::DocumentElement;
 pub use document::Heading;