You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: language.rs
    path of file: ./repos/vim-clap/crates/matcher/src/matchers/bonus_matcher/bonus
    
    the code of the file until where you have to start completion: //! Add a bonus to the comment line or the line that can have a declaration.
//!
//! Ref: https://github.com/jacktasia/dumb-jump/blob/master/dumb-jump.el

use crate::Score;

pub type FileExtension = String;

#[derive(Debug, Clone)]
pub 
    
    pub fn calc_bonus(&self, bonus_text: &str, base_score: Score) -> Score {
        let trimmed = bonus_text.trim_start();

        if code_tools::language::is_comment(trimmed, &self.0) {
            -(base_score / 5)
        } else {
            match code_tools::analyzer::calculate_pattern_priority(trimmed, &self.0) {
                Some(priority) => base_score / priority.as_i32(),
                None => 0,
            }
        }
    }