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/**

* @name Inconsistent return statements

* @description A function should either always return an explicit value, or never return a value.

* @kind problem

* @problem.severity recommendation

* @id js/mixed-returns

* @tags reliability

* maintainability

* @precision medium

*/

import javascript

from Function f, ReturnStmt explicit, ReturnStmt implicit

where

explicit.getContainer() = f and

implicit.getContainer() = f and

exists(explicit.getExpr()) and

not exists(implicit.getExpr())

select implicit,

"This return statement implicitly returns 'undefined', whereas $@ returns an explicit value.",

explicit, "another return statement in the same function"