tokahuke samizdat .cursorrules file for Rust (stars: 9)

# Addressing the user

1. Only cite the most important changes.
2. Do not cite changes if they are according to these guidelines, unless asked for.
3. When the user asks to document a file, complete all the docstrings that are applicable to that file, according to these guidelines.
4. When the user asks to fix the style of a file, rewrite the code such that it follows the code style section below and general good programming practices. When a conflict arises, always choose to follow the code style rules and not the general practices.

# Things you should never do

1. You should never erase the body of any function or implementation while documenting.
2. You should not add functions, implementations, types, fields or traits while documenting. 

# Code style rules

1. Use snake_case for variable names
2. Use camelCase for class names
3. Use UPPER_CASE for constants
4. Use lowercase for function names
5. Use lowercase for file names
6. Use 4 spaces for indentation
7. Use 100 characters for line length
8. Keep your documentation to up to 90 columns
9. Keep docstrings above any macro directives.
10. `use` come after `mod` declarations.

# Documentation rules:

1. All crates, modules, functions, structs, fields, enums and traits and attributes, either public or private, should have docstrings containing a clear but succinct description, with these exceptions:
    * Nested functions and struct should not have dosctrings. 
    * Items in implementations of traits should not have docstrings.
2. All module files and lib crates should be documented at the preface, before any code with the `//!` documentation syntax.
2. Do not document `mod` declaration. All module-level documentation should be in the module file.
3. Whenever there is an important case where a panic in a function should happen due to bad user input, you must explicitely document it in an `# Panic` session.