Question 1

How does Vigil compare to other contract-based languages like Eiffel?

Accepted Answer

Vigil is more extreme by automatically deleting violating code, whereas Eiffel uses runtime checks that can be logged or handled. Vigil is experimental and lacks advanced features like inheritance or modular contracts.

Question 2

How to backup code before running Vigil to avoid loss?

Accepted Answer

Use version control systems like Git to commit changes before execution, or manually copy source files to a separate directory. Since Vigil modifies files directly, backups are essential to prevent irreversible deletions.

Question 3

Is Vigil actually used in any real-world projects?

Accepted Answer

No, Vigil is primarily an experimental language from a 2013 competition, with no known production use. It's best for educational demonstrations or exploring radical programming concepts.

Question 4

What happens if Vigil deletes the main function?

Accepted Answer

If the main function is deleted, the program becomes non-executable, and subsequent runs will have no entry point. This underscores the need for correct specifications to avoid over-deletion.

Question 5

Can Vigil handle side effects or stateful operations in oaths?

Accepted Answer

Vigil's `implore` and `swear` statements only support simple boolean expressions, not complex state checks or side effects. This limits its use for applications requiring intricate specifications.

Question 6

What tools are available for developing in Vigil?

Accepted Answer

Vigil is a minimal command-line executable with no integrated development environments, debuggers, or package managers. Development is basic, relying on text editors and manual execution.

Vigil

What is Vigil?

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