An implementation mechanism for tailorable exceptional flow

Decomposing software according to the structure of the problem domain makes it easier to manage its complexity. Such a decomposition requires a programming language that supports compositions matching those in the problem domain. However, current programming languages only offer a restricted set of control-flow related composition mechanisms, such as method invocation and exception handling. This limits developers in choosing the desired decomposition. Previously, we showed that continuations are suitable for implementing various control-flow compositions. However, composing and refining these implementations requires new language features. In this paper, we outline requirements for control-flow composition and show how exception handling can be implemented using continuations, scopes and bindings.