Initial success

1 files changed, 30 insertions, 0 deletions

diff --git a/src/graph.rs b/src/graph.rs
new file mode 100644
index 0000000..47d6523
--- /dev/null
+++ b/src/graph.rs
@@ -0,0 +1,30 @@
+// Copyright (C) 2022 Soni L.
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+//! The results produced by a matched pattern.
+
+use serde::de::Deserialize;
+
+use crate::vm::MAX_CALLS;
+use crate::vm::Pack;
+use crate::vm::Unpacker;
+use crate::errors::QueryError;
+
+// TODO in the future, we may want to store &'pat IndexSet<String> either here
+// or in the Pack.
+#[derive(Debug)]
+pub struct Graph<'pat, 'de>(pub(crate) Option<Pack<'pat, 'de>>);
+
+impl<'pat, 'de> Graph<'pat, 'de> {
+    /// Collect this graph into a given form.
+    pub fn collect<De: Deserialize<'de>>(self) -> Result<De, QueryError> {
+        let Self(inner) = self;
+        match inner {
+            None => Err(QueryError::Empty),
+            Some(pack) => {
+                let mut unpacker = Unpacker::new(pack, MAX_CALLS);
+                De::deserialize(unpacker)
+            },
+        }
+    }
+}