fix: support empty array items

trunk_parser/src/ast.rs

@@ -388,6 +388,7 @@ pub struct Use {
 #[derive(Debug, PartialEq, Clone)]
 pub enum Expression {
  Static,
+ Empty,
  ErrorSuppress {
  expr: Box<Self>,
  },

trunk_parser/src/parser/mod.rs

@@ -1505,6 +1505,12 @@ impl Parser {
  self.skip_comments();
 
  while self.current.kind != TokenKind::RightBracket {
+ if self.current.kind == TokenKind::Comma {
+ items.push(ArrayItem { key: None, value: Expression::Empty });
+ self.next();
+ continue;
+ }
+
  let mut key = None;
  let mut value = self.expression(0)?;
 
@@ -3421,6 +3427,30 @@ mod tests {
  );
  }
 
+ #[test]
+ fn array_empty_items() {
+ assert_ast("<?php [1, 2, , 4];", &[
+ expr!(Expression::Array { items: vec![
+ ArrayItem {
+ key: None,
+ value: Expression::Int { i: 1 },
+ },
+ ArrayItem {
+ key: None,
+ value: Expression::Int { i: 2 },
+ },
+ ArrayItem {
+ key: None,
+ value: Expression::Empty,
+ },
+ ArrayItem {
+ key: None,
+ value: Expression::Int { i: 4 },
+ },
+ ] })
+ ])
+ }
+
  fn assert_ast(source: &str, expected: &[Statement]) {
  let mut lexer = Lexer::new(None);
  let tokens = lexer.tokenize(source).unwrap();