Contract Oriented Programming and Spec#

The Spec# programming system is a new attempt at a more cost effective way to develop and maintain high-quality software.  Spec# is pronounced "Spec sharp" and can be written (and searched for) as the "specsharp" or "Spec# programming system".  The Spec# system consists of: The Spec# programming language.  Spec# is an extension of the object-oriented […]

The Spec# programming system is a new attempt at a more cost effective way to develop and maintain high-quality software.  Spec# is pronounced "Spec sharp" and can be written (and searched for) as the "specsharp" or "Spec# programming system".  The Spec# system consists of:

The Spec# programming language.  Spec# is an extension of the object-oriented language C#.  It extends the type system to include non-null types and checked exceptions.  It provides method contracts in the form of pre- and postconditions as well as object invariants.

The Spec# compiler.  Integrated into the Microsoft Visual Studio development environment for the .NET platform, the compiler statically enforces non-null types, emits run-time checks for method contracts and invariants, and records the contracts as metadata for consumption by downstream tools.

The Spec# static program verifier.  This component (codenamed Boogie) generates logical verification conditions from a Spec# program.  Internally, it uses an automatic theorem prover that analyzes the verification conditions to prove the correctness of the program or find errors in it.

Full Article