tree 9968aaf0ad230dfbc8852c4dca1e0af75538f37b
parent 5f831719994c94606933a70bc275194efc87b0f4
author Yuto Takano <yuto.takano@arm.com> 1629723296 +0100
committer Yuto Takano <yuto.takano@arm.com> 1629723296 +0100

Use Abstract Base Classes to ensure Problem is not instantiated

- Problem() is a parent abstract class that should only be used for
  subclassing.
- With the help of ABC, implement abstract methods that force
  subclasses to implement quiet and verbose outputs.
- The repeated logic of "if self.quiet" is consolidated in Problem.

Signed-off-by: Yuto Takano <yuto.takano@arm.com>