Add Rust target

spec/test_parse_inner_nested.rs

@@ -0,0 +1,17 @@
+use testparser::*;
+
+fn eval(input: &[u8]) -> i64 {
+    let mut c = p_context_new(input);
+    assert_eq!(P_SUCCESS, p_parse(&mut c));
+    let v = p_result(&c);
+    p_context_delete(c);
+    v
+}
+
+fn main() {
+    assert_eq!(5, eval(b"2 + 3"));
+    assert_eq!(3, eval(b"(1 + 2)"));
+    assert_eq!(14, eval(b"2 + (3 + 4) + 5"));
+    assert_eq!(37, eval(b"2 + (10 + (20 + 5))"));
+    assert_eq!(15, eval(b"(1 + 2) + (3 + (4 + 5))"));
+}