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Preconditions and Postconditions

Explore how to apply preconditions and postconditions within D's contract programming to validate inputs and outputs. Understand how in and out blocks work with member functions and constructors to ensure object consistency and reduce programming errors.

Contract programming

Contract programming is very effective for reducing coding errors. You have seen two of the contract programming features earlier in the contract programming chapter: The in and out blocks ensure input and output contracts of functions.

Note: It is very important that you consider the guidelines under the ...