Initial commit

src/error.rs

@@ -0,0 +1,13 @@
+#[derive(Debug)]
+pub enum Error {
+    GrammarError(String),
+    SymbolError(String),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+impl From<serde_json::Error> for Error {
+    fn from(error: serde_json::Error) -> Self {
+        Error::GrammarError(error.to_string())
+    }
+}