Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/lightbeam/examples/test.rs

@@ -0,0 +1,36 @@
+extern crate lightbeam;
+
+use lightbeam::translate;
+use std::fs::File;
+use std::io;
+use std::io::Read;
+use std::path::Path;
+
+fn read_to_end<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
+    let mut buffer = Vec::new();
+    if path.as_ref() == Path::new("-") {
+        let stdin = io::stdin();
+        let mut stdin = stdin.lock();
+        stdin.read_to_end(&mut buffer)?;
+    } else {
+        let mut file = File::open(path)?;
+        file.read_to_end(&mut buffer)?;
+    }
+    Ok(buffer)
+}
+
+fn maybe_main() -> Result<(), String> {
+    let data = read_to_end("test.wasm").map_err(|e| e.to_string())?;
+    let translated = translate(&data).map_err(|e| e.to_string())?;
+    let result: u32 = translated.execute_func(0, (5u32, 3u32)).unwrap();
+    println!("f(5, 3) = {}", result);
+
+    Ok(())
+}
+
+fn main() {
+    match maybe_main() {
+        Ok(()) => (),
+        Err(e) => eprintln!("error: {}", e),
+    }
+}