parser: support first class callables on static method calls

trunk_parser/src/parser/mod.rs

@@ -2110,6 +2110,16 @@ impl Parser {
                                 unpack = true;
                             }
 
+                            if unpack && self.current.kind == TokenKind::RightParen {
+                                args.push(Arg {
+                                    name: None,
+                                    unpack: false,
+                                    value: Expression::VariadicPlaceholder
+                                });
+    
+                                break;
+                            }
+
                             let value = self.expression(Precedence::Lowest)?;
 
                             args.push(Arg {
@@ -4045,6 +4055,19 @@ mod tests {
         ]);
     }
 
+    #[test]
+    fn first_class_callable_static_method() {
+        assert_ast("<?php A::foo(...);", &[
+            expr!(Expression::StaticMethodCall { target: Box::new(Expression::Identifier { name: "A".into() }), method: "foo".into(), args: vec![
+                Arg {
+                    name: None,
+                    unpack: false,
+                    value: Expression::VariadicPlaceholder
+                }
+            ] })
+        ]);
+    }
+
     fn assert_ast(source: &str, expected: &[Statement]) {
         let mut lexer = Lexer::new(None);
         let tokens = lexer.tokenize(source).unwrap();