Eiffel

Website: eiffel.org

Designed by: Bertrand Meyer

Eiffel is an object-oriented programming language designed by Bertrand Meyer (an object-orientation proponent and author of Object-Oriented Software Construction) and Eiffel Software.

Meyer conceived the language in 1985 with the goal of increasing the reliability of commercial software development; the first version becoming available in 1986.

In 2005, Eiffel became an ISO-standardized language.

The design of the language is closely connected with the Eiffel programming method.

Both are based on a set of principles, including design by contract, command–query separation, the uniform-access principle, the single-choice principle, the open–closed principle, and option–operand separation.

Many concepts initially introduced by Eiffel later found their way into Java, C#, and other languages.

New language design ideas, particularly through the Ecma/ISO standardization process, continue to be incorporated into the Eiffel language.