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/**

* @name Arrow method on Vue instance

* @description An arrow method on a Vue instance doesn't have its `this` variable bound to the Vue instance.

* @kind problem

* @problem.severity warning

* @id js/vue/arrow-method-on-vue-instance

* @tags quality

* reliability

* correctness

* frameworks/vue

* @precision high

*/

import javascript

from Vue::Component instance, DataFlow::Node def, DataFlow::FunctionNode arrow, ThisExpr dis

where

instance.getABoundFunction() = def and

arrow.flowsTo(def) and

arrow.asExpr() instanceof ArrowFunctionExpr and

arrow.asExpr() = dis.getEnclosingFunction()

select def, "The $@ of this $@ it will not be bound to the Vue instance.", dis, "`this` variable",

arrow, "arrow function"