diff --git a/README.md b/README.md
index fc205b2..dd7d840 100644
--- a/README.md
+++ b/README.md
@@ -46,3 +46,20 @@
 - [ ] IO Intrinsics
   - [ ] Print
   - [ ] ReadLine
+
+## Grammar
+
+### Expressions
+
+```
+expr_primary = LITERAL | "(" expr p | "-" expr_primary | "~" expr_primary
+expr_mul = expr_primary (("*" | "/" | "%") expr_primary)*
+expr_add = expr_mul (("+" | "-") expr_mul)*
+expr_shift = expr_add ((">>" | "<<") expr_add)*
+expr_rel = expr_shift ((">" | ">=" | "<" | "<=") expr_shift)*
+expr_equ = expr_rel (("==" | "!=") expr_rel)*
+expr_band = expr_equ ("&" expr_equ)*
+expr_bxor = expr_band ("^" expr_band)*
+expr_bor = expr_bxor ("|" expr_bxor)*
+expr = expr_bor
+```
\ No newline at end of file
diff --git a/src/parser.rs b/src/parser.rs
index 3774aaf..168c599 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -73,21 +73,6 @@ pub enum Ast {
     UnOp(UnOpType, Box<Ast>),
 }
 
-/*
-## Grammar
-### Expressions
-expr_primary = LITERAL | "(" expr p | "-" expr_primary | "~" expr_primary
-expr_mul = expr_primary (("*" | "/" | "%") expr_primary)*
-expr_add = expr_mul (("+" | "-") expr_mul)*
-expr_shift = expr_add ((">>" | "<<") expr_add)*
-expr_rel = expr_shift ((">" | ">=" | "<" | "<=") expr_shift)*
-expr_equ = expr_rel (("==" | "!=") expr_rel)*
-expr_band = expr_equ ("&" expr_equ)*
-expr_bxor = expr_band ("^" expr_band)*
-expr_bor = expr_bxor ("|" expr_bxor)*
-expr = expr_bor
-*/
-
 struct Parser<T: Iterator<Item = Token>> {
     tokens: Peekable<T>,
 }