From 1dea9e3946c285c2fbd08bb87a839784a6709ade Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Szeremeta?= <l.szeremeta.dev@gmail.com>
Date: Sun, 18 Feb 2024 22:12:39 +0100
Subject: [PATCH] Disallow leading zeroes in UNSIGNED_INT (fixes #87)

---
 other-notations/YARSpg.ebnf | 2 +-
 yarspg/YARSpg.g4            | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/other-notations/YARSpg.ebnf b/other-notations/YARSpg.ebnf
index e07cef5..31fd1d7 100644
--- a/other-notations/YARSpg.ebnf
+++ b/other-notations/YARSpg.ebnf
@@ -170,7 +170,7 @@ OPTIONAL ::= ( 'O' | 'o' ) ( 'P' | 'p' ) ( 'T' | 't' ) ( 'I' | 'i' ) ( 'O' | 'o'
 COMMENT  ::= '#' [^#xd#xa#xc]*
 STR      ::= '"' ( [^#x22#x5C#xd#xa] | '\' [tbnrf#x22#x27#x5C])* '"' /* #x22=" #x5C=\ #xD=carriage return #xA=new line #x27='; */
 UNSIGNED_INT
-         ::= [0-9]+
+         ::= '0' | [1-9] [0-9]*
 ALNUMPLUS
          ::= [a-zA-Z_] [a-zA-Z0-9_]*
 WS       ::= [ #x9#xa]+
diff --git a/yarspg/YARSpg.g4 b/yarspg/YARSpg.g4
index 0567d01..9e3fe5f 100644
--- a/yarspg/YARSpg.g4
+++ b/yarspg/YARSpg.g4
@@ -289,7 +289,7 @@ STR
     ;
 
 UNSIGNED_INT
-    : [0-9]+
+    : '0' | [1-9] [0-9]*
     ;
 
 ALNUMPLUS