Add Rust target

spec/test_positions.rs

@@ -0,0 +1,19 @@
+use testparser::*;
+
+fn main() {
+    let mut c = p_context_new(b"    Hello\n\n        4200\n");
+    assert_eq!(P_SUCCESS, p_parse(&mut c));
+    p_context_delete(c);
+
+    println!();
+
+    let mut c = p_context_new(b"\n tok2");
+    assert_eq!(P_SUCCESS, p_parse(&mut c));
+    p_context_delete(c);
+
+    println!();
+
+    let mut c = p_context_new(b"  tok1");
+    assert_eq!(P_SUCCESS, p_parse(&mut c));
+    p_context_delete(c);
+}