From b809c1db8dcc0bd57435905e1a74b4024cb4ef88 Mon Sep 17 00:00:00 2001
From: Jooris Hadeler <jooris@hadeler.me>
Date: Thu, 23 Apr 2026 18:52:34 +0200
Subject: [PATCH] init: this is the inital commit

---
 .gitignore                    |  1 +
 example.ebnf                  |  2 ++
 extension.toml                | 13 ++++++++++++
 languages/ebnf/brackets.scm   | 15 ++++++++++++++
 languages/ebnf/config.toml    | 15 ++++++++++++++
 languages/ebnf/highlights.scm | 37 +++++++++++++++++++++++++++++++++++
 languages/ebnf/outline.scm    |  3 +++
 7 files changed, 86 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 example.ebnf
 create mode 100644 extension.toml
 create mode 100644 languages/ebnf/brackets.scm
 create mode 100644 languages/ebnf/config.toml
 create mode 100644 languages/ebnf/highlights.scm
 create mode 100644 languages/ebnf/outline.scm

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b05eeea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+grammars/
diff --git a/example.ebnf b/example.ebnf
new file mode 100644
index 0000000..58503df
--- /dev/null
+++ b/example.ebnf
@@ -0,0 +1,2 @@
+expr = term { ( "+" | "-" ) term } ;
+term = number { ( "*" | "/" ) number } ;
diff --git a/extension.toml b/extension.toml
new file mode 100644
index 0000000..65a8963
--- /dev/null
+++ b/extension.toml
@@ -0,0 +1,13 @@
+id = "ebnf"
+name = "EBNF"
+version = "0.0.1"
+schema_version = 1
+authors = ["Jooris Hadeler <jooris@hadeler.me>"]
+description = "Syntax highlighting for Extended Backus-Naur Form (EBNF)"
+
+[grammars.ebnf]
+repository = "https://git.hadeler.me/jooris/tree-sitter-ebnf"
+commit = "main"
+
+[lib]
+version = "0.1.0"
diff --git a/languages/ebnf/brackets.scm b/languages/ebnf/brackets.scm
new file mode 100644
index 0000000..a521c6d
--- /dev/null
+++ b/languages/ebnf/brackets.scm
@@ -0,0 +1,15 @@
+; Standard brackets
+("[" @open "]" @close)
+("{" @open "}" @close)
+("(" @open ")" @close)
+
+; EBNF specific sequence brackets
+("(/" @open "/)" @close)
+("(:" @open ":)" @close)
+
+; Strings
+("\"" @open "\"" @close)
+("'" @open "'" @close)
+
+; Special sequence
+("?" @open "?" @close)
diff --git a/languages/ebnf/config.toml b/languages/ebnf/config.toml
new file mode 100644
index 0000000..7c7c943
--- /dev/null
+++ b/languages/ebnf/config.toml
@@ -0,0 +1,15 @@
+name = "EBNF"
+grammar = "ebnf"
+path_suffixes = ["ebnf"]
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = false },
+    { start = "(/", end = "/)", close = true, newline = false },
+    { start = "(:", end = ":)", close = true, newline = false },
+    { start = "\"", end = "\"", close = true, newline = false },
+    { start = "'", end = "'", close = true, newline = false }
+]
+
+[language_server]
+# Leave empty
diff --git a/languages/ebnf/highlights.scm b/languages/ebnf/highlights.scm
new file mode 100644
index 0000000..78fdb9c
--- /dev/null
+++ b/languages/ebnf/highlights.scm
@@ -0,0 +1,37 @@
+; variables and identifiers
+; We match the left-hand side of a rule as a function/type definition for better visual hierarchy
+(syntax_rule
+  (meta_identifier) @type)
+
+(meta_identifier) @property
+
+; Literals
+(terminal_string) @string
+(integer) @number
+
+; Comments and special sequences
+(comment) @comment
+(special_sequence) @string.special
+
+; Operators
+"=" @operator
+"|" @operator
+"-" @operator
+"*" @operator
+
+; Delimiters
+"," @punctuation.delimiter
+";" @punctuation.delimiter
+
+; Brackets
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+"{" @punctuation.bracket
+"}" @punctuation.bracket
+"(" @punctuation.bracket
+")" @punctuation.bracket
+"(/" @punctuation.bracket
+"/)" @punctuation.bracket
+"(:" @punctuation.bracket
+":)" @punctuation.bracket
+"?" @punctuation.bracket
diff --git a/languages/ebnf/outline.scm b/languages/ebnf/outline.scm
new file mode 100644
index 0000000..39f38e9
--- /dev/null
+++ b/languages/ebnf/outline.scm
@@ -0,0 +1,3 @@
+(syntax_rule
+  (meta_identifier) @name
+) @item