Add a dump_events example to aid debugging.

saphyr/examples/dump_events.rs

@@ -0,0 +1,38 @@
+extern crate yaml_rust;
+
+use std::env;
+use std::fs::File;
+use std::io::prelude::*;
+use yaml_rust::{
+    parser::{MarkedEventReceiver, Parser},
+    scanner::Marker,
+    Event,
+};
+
+#[derive(Debug)]
+struct EventSink {
+    events: Vec<(Event, Marker)>,
+}
+
+impl MarkedEventReceiver for EventSink {
+    fn on_event(&mut self, ev: Event, mark: Marker) {
+        self.events.push((ev, mark));
+    }
+}
+
+fn str_to_events(yaml: &str) -> Vec<(Event, Marker)> {
+    let mut sink = EventSink { events: Vec::new() };
+    let mut parser = Parser::new(yaml.chars());
+    // Load events using our sink as the receiver.
+    parser.load(&mut sink, true).unwrap();
+    sink.events
+}
+
+fn main() {
+    let args: Vec<_> = env::args().collect();
+    let mut f = File::open(&args[1]).unwrap();
+    let mut s = String::new();
+    f.read_to_string(&mut s).unwrap();
+
+    dbg!(str_to_events(&s));
+}