Support hashbang comments

FIX: Properly parse hashbang comments. Closes codemirror/dev#1236
lezer-parser · Aug 23, 2023 · 7512c95 · 7512c95
1 parent 6bfbf41
commit 7512c95
Show file tree

Hide file tree

Showing 3 changed files with 13 additions and 2 deletions.
diff --git a/src/highlight.js b/src/highlight.js
@@ -25,7 +25,7 @@ export const jsHighlight = styleTags({
   PropertyDefinition: t.definition(t.propertyName),
   PrivatePropertyDefinition: t.definition(t.special(t.propertyName)),
   UpdateOp: t.updateOperator,
-  LineComment: t.lineComment,
+  "LineComment Hashbang": t.lineComment,
   BlockComment: t.blockComment,
   Number: t.number,
   String: t.string,

diff --git a/src/javascript.grammar b/src/javascript.grammar
@@ -36,7 +36,7 @@
   predicate
 }
 
-@top Script { statement+ }
+@top Script { Hashbang? statement+ }
 
 @top SingleExpression { expression }
 
@@ -609,6 +609,8 @@ questionOp[@name=LogicOp] { "?" }
 
   LineComment { "//" ![\n]* }
 
+  Hashbang { "#!" ![\n]* }
+
   divide[@name=ArithOp] { "/" }
 
   @precedence { "/*", LineComment, divide }

diff --git a/test/statement.txt b/test/statement.txt
@@ -374,3 +374,12 @@ Script(
   ClassDeclaration(class,VariableDefinition,ClassBody(
     MethodDeclaration(Star,PropertyDefinition,ParamList,Block))),
   ExpressionStatement(ParenthesizedExpression(ObjectExpression(Property(Star,PropertyDefinition,ParamList,Block)))))
+
+# Hashbang
+
+#!/bin/env node
+foo()
+
+==>
+
+Script(Hashbang,ExpressionStatement(CallExpression(VariableName,ArgList)))