cargo-count 0.1.4

Cargo subcommand for displaying statistics about projects, such as code, comments, and unsafe counters
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use std::fmt as StdFmt;

use comment::Comment;

#[derive(Debug)]
pub enum Language {
    C,
    Header,
    Hpp,
    Cpp,
    Css,
    Html,
    Java,
    JavaScript,
    Perl,
    Php,
    Python,
    Ruby,
    Rust,
    Xml,
    Toml,
    Go,
}

impl Language {
    pub fn from_ext(ext: &str) -> Option<Language> {
        match ext {
            "cpp" => Some(Language::Cpp),
            "hpp" => Some(Language::Hpp),
            "c" => Some(Language::C),
            "h" => Some(Language::Header),
            "css" => Some(Language::Css),
            "java" => Some(Language::Java),
            "js" => Some(Language::JavaScript),
            "rs" => Some(Language::Rust),
            "xml" => Some(Language::Xml),
            "html" => Some(Language::Html),
            "py" => Some(Language::Python),
            "rb" => Some(Language::Ruby),
            "php" => Some(Language::Php),
            "toml" => Some(Language::Toml),
            "pl" => Some(Language::Perl),
            "go" => Some(Language::Go),
            _ => None,
        }
    }

    pub fn name(&self) -> &str {
        match *self {
            Language::Cpp => "C++",
            Language::Hpp => "C++ Header",
            Language::C => "C",
            Language::Header => "C Header",
            Language::Css => "CSS",
            Language::Java => "Java",
            Language::JavaScript => "JavaScript",
            Language::Rust => "Rust",
            Language::Xml => "XML",
            Language::Html => "HTML",
            Language::Python => "Python",
            Language::Ruby => "Ruby",
            Language::Php => "PHP",
            Language::Toml => "TOML",
            Language::Perl => "Perl",
            Language::Go => "Go",
        }
    }

    pub fn extension(&self) -> &str {
        match *self {
            Language::Cpp => "cpp",
            Language::Hpp => "hpp",
            Language::C => "c",
            Language::Header => "h",
            Language::Css => "css",
            Language::Java => "java",
            Language::JavaScript => "js",
            Language::Rust => "rs",
            Language::Xml => "xml",
            Language::Html => "html",
            Language::Python => "py",
            Language::Ruby => "rb",
            Language::Php => "php",
            Language::Perl => "pl",
            Language::Toml => "toml",
            Language::Go => "go",
        }
    }

    pub fn is_unsafe(&self) -> bool {
        match *self {
            Language::C |
            Language::Cpp |
            Language::Hpp |
            Language::Header |
            Language::Rust => true,
            _ => false,
        }
    }

    pub fn unsafe_keyword(&self) -> Option<&str> {
        match *self {
            Language::Rust => Some("unsafe"),
            _ => None,
        }
    }
}

impl StdFmt::Display for Language {
    fn fmt(&self, f: &mut StdFmt::Formatter) -> StdFmt::Result {
        write!(f, "{}", self.name())
    }
}


impl Comment for Language {
	type Rep = &'static str;

    fn single(&self) -> Option<Vec<<Self as Comment>::Rep>> {
        match *self {
            Language::C |
            Language::Cpp |
            Language::Hpp |
            Language::Header |
            Language::Css |
            Language::Java |
            Language::JavaScript |
            Language::Rust |
            Language::Go => Some(vec!["//"]),
            Language::Php => Some(vec!["//", "#"]),
            Language::Xml |
            Language::Html => Some(vec!["<!--"]),
            Language::Ruby |
            Language::Python |
            Language::Toml |
            Language::Perl => Some(vec!["#"]),

        }
    }

    fn multi_start(&self) -> Option<<Self as Comment>::Rep> {
        match *self {
            Language::C |
            Language::Cpp |
            Language::Hpp |
            Language::Header |
            Language::Css |
            Language::Java |
            Language::JavaScript |
            Language::Go |
            Language::Rust |
            Language::Php => Some("/*"),
            Language::Xml |
            Language::Html => Some("<!--"),
            Language::Ruby => Some("=begin"),
            Language::Python => Some("'''"),
            Language::Toml |
            Language::Perl => None,
        }
    }

    fn multi_end(&self) -> Option<<Self as Comment>::Rep> {
        match *self {
            Language::C |
            Language::Cpp |
            Language::Hpp |
            Language::Header |
            Language::Css |
            Language::Java |
            Language::Go |
            Language::JavaScript |
            Language::Rust |
            Language::Php => Some("*/"),
            Language::Xml |
            Language::Html => Some("-->"),
            Language::Ruby => Some("=end"),
            Language::Python => Some("'''"),
            Language::Toml |
            Language::Perl => None,
        }
    }
}