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: parse_style.rs
    path of file: ./repos/delta/src
    
    the code of the file until where you have to start completion: use bitflags::bitflags;

use crate::color;
use crate::config::delta_unreachable;
use crate::fatal;
use crate::git_config::GitConfig;
use crate::style::{DecorationStyle, Style};

impl Style {
    /// Construct Style from style and decoration-style strings supplied on command line, together
    /// with defaults. A style string is a space-separated string containing 0, 1, or 2 colors
    /// (foreground and then background) and an arbitrary number of style attributes. See `delta
    /// --help` for more precise spec.
    pub fn from_str(
        style_string: &str,
        default: Option<Self>,
        decoration_style_string: Option<&str>,
        true_color: bool,
        git_config: Option<&GitConfig>,
    ) -> Self {
        let (ansi_term_style, is_omitted, is_raw, is_syntax_highlighted) =
            parse_ansi_term_style(style_string, default, true_color, git_config);
        let decoration_style = DecorationStyle::from_str(
            decoration_style_string.unwrap_or(""),
            true_color,
            git_config,
        );
        Self {
            ansi_term_style,
            is_emph: false,
            is_omitted,
            is_raw,
            is_syntax_highlighted,
            decoration_style,
        }
    }

    pub fn from_git_str(git_style_
    
    pub fn from_str(style_string: &str, true_color: bool, git_config: Option<&GitConfig>) -> Self {
        let (special_attributes, style_string) =
            extract_special_decoration_attributes(style_string);
        let (style, is_omitted, is_raw, is_syntax_highlighted) =
            parse_ansi_term_style(&style_string, None, true_color, git_config);
        if is_raw {
            fatal("'raw' may not be used in a decoration style.");
        };
        if is_syntax_highlighted {
            fatal("'syntax' may not be used in a decoration style.");
        };
        #[allow(non_snake_case)]
        let (BOX, UL, OL, EMPTY) = (
            DecorationAttributes::BOX,
            DecorationAttributes::UNDERLINE,
            DecorationAttributes::OVERLINE,
            DecorationAttributes::EMPTY,
        );
        match special_attributes {
            bits if bits == EMPTY => DecorationStyle::NoDecoration,
            bits if bits == BOX => DecorationStyle::Box(style),
            bits if bits == UL => DecorationStyle::Underline(style),
            bits if bits == OL => DecorationStyle::Overline(style),
            bits if bits == UL | OL => DecorationStyle::UnderOverline(style),
            bits if bits == BOX | UL => DecorationStyle::BoxWithUnderline(style),
            bits if bits == BOX | OL => DecorationStyle::BoxWithOverline(style),
            bits if bits == BOX | UL | OL => DecorationStyle::BoxWithUnderOverline(style),
            _ if is_omitted => DecorationStyle::NoDecoration,
            _ => delta_unreachable("Unreachable code path reached in parse_decoration_style."),
        }
    }