Required Trait %s wasn’t added to %s

Description

This error happens during name conflict resolution for traits. It means that one of the mentionned trait is not use in the code, and cannot be replaced or replacing another method. In the example below, the trait T2 is mentionned, but is not in the use command.

Example

<?php
trait T1 {
    function foo() {echo "T1\n";}
}
trait T2 {
        function foo() {echo "T2\n";}
}
class C {
    use T1 {
        T2::foo insteadof T1;
    }
}
?>

Literal Examples

• Required Trait T2 wasn’t added to C

Solutions

• Add the missing trait to the class.

• Remove the extra name resolution from the class.