node/error: add module skeleton

src/node/error.rs

@@ -0,0 +1,24 @@
+/*
+ * This Source Code Form is subject to the terms of the
+ * Mozilla Public License, v. 2.0. If a copy of the MPL
+ * was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+//! This module contains the errors that may surface while
+//! parsing a YAML event stream into memory.
+
+use crate::{event::error::ParseError, scanner::error::ScanError};
+
+/// Result type returned by [`yary::node`](super)
+pub(crate) type NodeResult<T> = std::result::Result<T, NodeError>;
+
+/// Possible errors that can be encountered while parsing
+/// YAML graph structures.
+#[derive(Debug)]
+pub(crate) enum NodeError
+{
+    UndefinedAlias,
+
+    Parser(ParseError),
+    Scanner(ScanError),
+}

src/node/mod.rs

@@ -9,5 +9,6 @@
 
 use crate::event::types::Slice;
 
+pub(crate) mod error;
 mod graph;
 mod nodes;