add copyright notice to all source files

3 files changed, 12 insertions, 0 deletions

diff --git a/src/error/mod.rs b/src/error/mod.rs
index a269555..649ef08 100644
--- a/src/error/mod.rs
+++ b/src/error/mod.rs
@@ -1,3 +1,7 @@
+/* Copyright (C) 2019  Akshay Oppiliappan <[email protected]>
+ * Refer to LICENCE for more information.
+ * */
+
 #[derive(Debug)]
 pub enum CalcError {
     Math(Math),
diff --git a/src/lex/mod.rs b/src/lex/mod.rs
index 8348e72..c0c4f84 100644
--- a/src/lex/mod.rs
+++ b/src/lex/mod.rs
@@ -1,3 +1,7 @@
+/* Copyright (C) 2019  Akshay Oppiliappan <[email protected]>
+ * Refer to LICENCE for more information.
+ * */
+
 use std::collections::HashMap;
 
 use crate::error::{
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index 4238e3b..b74df4c 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -1,3 +1,7 @@
+/* Copyright (C) 2019  Akshay Oppiliappan <[email protected]>
+ * Refer to LICENCE for more information.
+ * */
+
 use crate::lex::Token;
 use crate::error::CalcError;