From 32a55dacda60d149e996cce440fde58ad64c2c8a Mon Sep 17 00:00:00 2001
From: Sergey Vartanov <me@enzet.ru>
Date: Sat, 19 Aug 2023 23:54:09 +0400
Subject: [PATCH] Add preliminary ANTLR 4 grammar

---
 grammar/Moire.g4 | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 grammar/Moire.g4

diff --git a/grammar/Moire.g4 b/grammar/Moire.g4
new file mode 100644
index 0000000..705eaa7
--- /dev/null
+++ b/grammar/Moire.g4
@@ -0,0 +1,22 @@
+/**
+ * Grammar for Moire markup language.
+ *
+ * @author Sergey Vartanov
+ * @since 2 September 2022
+ */
+grammar Moire;
+
+document : markup EOF ;
+markup : ( tag | TEXT | WHITESPACE | escapedCharacter | DELIMITER )+ ;
+tag : TAG_NAME ( WHITESPACE? argument )* ;
+argument : CURLY_OPEN markup CURLY_CLOSE ;
+escapedCharacter : BACKSLASH (BACKSLASH | CURLY_OPEN | CURLY_CLOSE) ;
+
+DELIMITER : '\n\n' ;
+BACKSLASH : '\\' ;
+CURLY_OPEN : '{' ;
+CURLY_CLOSE : '}' ;
+fragment IDENTIFIER : [A-Za-z0-9_]+;
+TAG_NAME: BACKSLASH IDENTIFIER;
+WHITESPACE : [ \t\n\r]+;
+TEXT : [A-Za-z. \n\t\r]+;
\ No newline at end of file