Many software maintenance problems are caused by using text
editors to change programs. A more systematic and reliable way of performing
program updates is to express changes with an update language.
In particular, updates should preserve the syntax- and type-correctness of
the transformed object programs.
We describe an update calculus...
The lambda calculus has frequently been used as an intermediate representation for programming languages, particularly for functional programming language systems. We introduce two simple extensions to the lambda calculus that describe potentially parallel computations. These extensions permit us to use the lambda calculus as an intermediate form for languages that...