1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/gsgdt/src/multi_graph.rs b/vendor/gsgdt/src/multi_graph.rs
new file mode 100644
index 000000000..f0200a318
--- /dev/null
+++ b/vendor/gsgdt/src/multi_graph.rs
@@ -0,0 +1,33 @@
+use crate::graph::*;
+use std::io::{self, Write};
+use serde::{Deserialize, Serialize};
+
+/// A collection of graphs.
+#[derive(Deserialize, Serialize)]
+pub struct MultiGraph {
+    name: String,
+    graphs: Vec<Graph>,
+}
+
+impl MultiGraph {
+    pub fn new(name: String, graphs: Vec<Graph>) -> MultiGraph {
+        MultiGraph { name, graphs }
+    }
+
+    pub fn to_dot<W: Write>(&self, w: &mut W, settings: &GraphvizSettings) -> io::Result<()> {
+        let subgraphs = self.graphs.len() > 1;
+        if subgraphs {
+            writeln!(w, "digraph {} {{", self.name)?;
+        }
+
+        for graph in &self.graphs {
+            graph.to_dot(w, settings, subgraphs)?;
+        }
+
+        if subgraphs {
+            writeln!(w, "}}")?;
+        }
+
+        Ok(())
+    }
+}