Update Rust code to the current Rust nightly

Lots of changes! Hopefully everything is still semantically equivalent (tests
still pass)

1 files changed, 26 insertions, 0 deletions

diff --git a/rust/src/bin/step0_repl.rs b/rust/src/bin/step0_repl.rs
new file mode 100644
index 0000000..030c551
--- /dev/null
+++ b/rust/src/bin/step0_repl.rs
@@ -0,0 +1,26 @@
+extern crate mal;
+
+use mal::readline::mal_readline;
+
+// read
+fn read(str: String) -> String {
+    str
+}
+
+// eval
+fn eval(ast: String) -> String {
+    ast
+}
+
+// print
+fn print(exp: String) -> String {
+    exp
+}
+
+fn main() {
+    loop {
+        let line = mal_readline("user> ");
+        match line { None => break, _ => () }
+        println!("{}", print(eval(read(line.unwrap()))));
+    }
+}