sample

examples/syn.meow

@@ -0,0 +1,9 @@
+hh() { "dd" }
+sdf(hhs, fff) {
+    "fd" = hhg("ss");
+    var ldk = {
+        var s = ("ff" + hhs + "d");
+        "hhh"
+    };
+    "ffs"
+}

src/main.rs

@@ -1,3 +1,5 @@
+use std::env::args;
+
 pub mod ast;
 
 #[macro_use]
@@ -6,18 +8,12 @@ extern crate lalrpop_util;
 lalrpop_mod!(pub parse); // synthesized by LALRPOP
 
 fn main() {
+    let mut argv = args();
+    argv.next();
+    let fp = argv.next().expect("unknown file");
+    let fc = std::fs::read_to_string(fp).expect("failed to open the file");
     let res = parse::ProgramParser::new()
-        .parse(
-            r#"hh() { "dd" }
-            sdf(hhs, fff) {
-                "fd" = hhg("ss");
-                var ldk = {
-                    var s = ("ff" + hhs + "d");
-                    "hhh"
-                };
-                "ffs"
-            }"#,
-        )
-        .expect("Not expected!");
+        .parse(fc.as_str())
+        .expect("unexpected token!");
     println!("{:?}", res);
 }