1 files changed, 18 insertions, 1 deletions
diff --git a/tools/tree-sitter/grammar.js b/tools/tree-sitter/grammar.js
index 9e62a78..ca0e7d5 100644
--- a/tools/tree-sitter/grammar.js
+++ b/tools/tree-sitter/grammar.js
@@ -79,6 +79,7 @@ module.exports = grammar({
     _declaration: $ => choice(
       $.import_declaration,
       $.type_section,
+      $.const_section,
       $.var_section,
       $.threadvar_section,
       $.procedure_declaration,
@@ -106,6 +107,17 @@ module.exports = grammar({
       field('type', choice($._type_expression, 'extern')),
     ),
 
+    const_section: $ => seq(
+      'const',
+      repeat1(seq($.const_declaration, optional(';'))),
+    ),
+
+    const_declaration: $ => seq(
+      field('name', $.identifier_definition),
+      '=',
+      field('value', $._expression),
+    ),
+
     identifier_definition: $ => seq(
       field('name', $.identifier),
       optional(field('type_parameters', $.type_parameters)),
@@ -189,9 +201,14 @@ module.exports = grammar({
       optional(field('value', $._expression)),
     ),
 
+    _block_declaration: $ => choice(
+      $.const_section,
+      $.var_section,
+    ),
+
     block: $ => choice(
       seq(
-        $.var_section,
+        repeat1($._block_declaration),
         optional(seq('begin', optional($._statements))),
       ),
       seq(