--TEST-- Closure uses should parse to CLOSURE_USE_VAR nodes --FILE-- --EXPECTF-- AST_STMT_LIST 0: AST_ASSIGN var: AST_VAR name: "fn" expr: AST_CLOSURE flags: MODIFIER_STATIC | FUNC_RETURNS_REF (%d) name: "{closure}" docComment: null params: AST_PARAM_LIST 0: AST_PARAM type: null name: "a" default: null 1: AST_PARAM flags: PARAM_REF (%d) type: null name: "b" default: null uses: AST_CLOSURE_USES 0: AST_CLOSURE_VAR flags: 0 name: "c" 1: AST_CLOSURE_VAR flags: CLOSURE_USE_REF (%d) name: "d" stmts: AST_STMT_LIST returnType: null __declId: 0