Are there any restrictions when refactoring code?

When performing code refactoring, the following restrictions apply:

• Preservation of functionality: Refactoring should not change the behavior of the program. All changes must be transparent to the user.
• Test coverage: Without sufficient test coverage, the risk of introducing errors during refactoring increases.
• Time constraints: Sometimes, refactoring is limited by deadlines, so large-scale changes cannot be made.
• Dependencies and architecture: Complex dependencies between modules can limit the possibilities for refactoring.
• Understanding of the code: If the code is poorly documented or difficult to understand, refactoring can be risky.

It is important to approach refactoring gradually, with frequent checks and testing.