Only parse first class callables on PHP version 8.1 or later.

Author: Maarten Staa

src/parser/function.js

@@ -365,7 +365,11 @@ module.exports = {
   read_argument_list: function () {
     let result = [];
     this.expect("(") && this.next();
-    if (this.token === this.tok.T_ELLIPSIS && this.peek() === ")") {
+    if (
+      this.version >= 801 &&
+      this.token === this.tok.T_ELLIPSIS &&
+      this.peek() === ")"
+    ) {
       result.push(this.node("variadicplaceholder")());
       this.next();
     } else if (this.token !== ")") {

test/snapshot/__snapshots__/function.test.js.snap

@@ -319,6 +319,56 @@ Program {
 }
 `;
 
+exports[`Function tests first class callable support requires PHP 8.1+ 1`] = `
+Program {
+  "children": Array [
+    ExpressionStatement {
+      "expression": Assign {
+        "kind": "assign",
+        "left": Variable {
+          "curly": false,
+          "kind": "variable",
+          "name": "callable",
+        },
+        "operator": "=",
+        "right": Call {
+          "arguments": Array [
+            variadic {
+              "kind": "variadic",
+              "what": undefined,
+            },
+          ],
+          "kind": "call",
+          "what": Name {
+            "kind": "name",
+            "name": "strlen",
+            "resolution": "uqn",
+          },
+        },
+      },
+      "kind": "expressionstatement",
+    },
+  ],
+  "errors": Array [
+    Error {
+      "expected": "EXPR",
+      "kind": "error",
+      "line": 2,
+      "message": "Parse Error : syntax error, unexpected ')' on line 2",
+      "token": "')'",
+    },
+    Error {
+      "expected": ")",
+      "kind": "error",
+      "line": 2,
+      "message": "Parse Error : syntax error, unexpected ';', expecting ')' on line 2",
+      "token": "';'",
+    },
+  ],
+  "kind": "program",
+}
+`;
+
 exports[`Function tests implement #113 : typehint nodes 1`] = `
 Program {
   "children": Array [

test/snapshot/function.test.js

@@ -249,4 +249,20 @@ describe("Function tests", function () {
       )
     ).toMatchSnapshot();
   });
+
+  test("first class callable support requires PHP 8.1+", function () {
+    expect(
+      parser.parseEval(
+        `
+        $callable = strlen(...);
+        `,
+        {
+          parser: {
+            suppressErrors: true,
+            version: "8.0",
+          },
+        }
+      )
+    ).toMatchSnapshot();
+  });
 });