feat: runtime class static keyword

src/parser/variable.js

@@ -137,6 +137,15 @@ module.exports = {
         this.next();
         what = what(name, false);
         break;
+      case this.tok.T_CLASS:
+        if (!is_static_lookup) {
+          this.error();
+        }
+        what = this.node("identifier");
+        name = this.text();
+        this.next();
+        what = what(name, false);
+        break;
       case "$":
         what = this.node();
         this.next().expect(["$", "{", this.tok.T_VARIABLE]);

test/snapshot/__snapshots__/variable.test.js.snap

@@ -781,6 +781,59 @@ Program {
 }
 `;
 
+exports[`Test variables class keyword on variables 1`] = `
+Program {
+  "children": [
+    ExpressionStatement {
+      "expression": StaticLookup {
+        "kind": "staticlookup",
+        "offset": Identifier {
+          "kind": "identifier",
+          "name": "class",
+        },
+        "what": PropertyLookup {
+          "kind": "propertylookup",
+          "offset": Identifier {
+            "kind": "identifier",
+            "name": "classProp",
+          },
+          "what": Variable {
+            "curly": false,
+            "kind": "variable",
+            "name": "classVariable",
+          },
+        },
+      },
+      "kind": "expressionstatement",
+    },
+    ExpressionStatement {
+      "expression": StaticLookup {
+        "kind": "staticlookup",
+        "offset": Identifier {
+          "kind": "identifier",
+          "name": "class",
+        },
+        "what": OffsetLookup {
+          "kind": "offsetlookup",
+          "offset": Number {
+            "kind": "number",
+            "value": "0",
+          },
+          "what": Variable {
+            "curly": false,
+            "kind": "variable",
+            "name": "arrayVariable",
+          },
+        },
+      },
+      "kind": "expressionstatement",
+    },
+  ],
+  "errors": [],
+  "kind": "program",
+}
+`;
+
 exports[`Test variables default variables 1`] = `
 Program {
   "children": [

test/snapshot/variable.test.js

@@ -179,4 +179,12 @@ describe("Test variables", function () {
   it("simple variable #4", function () {
     expect(parser.parseEval("$var = $$$var;")).toMatchSnapshot();
   });
+  it("class keyword on variables", function () {
+    expect(
+      parser.parseEval(
+        `$classVariable->classProp::class;
+        $arrayVariable[0]::class;`,
+      ),
+    ).toMatchSnapshot();
+  });
 });