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: errorcodes.rs
    path of file: ./repos/readyset/mysql-srv/src
    
    the code of the file until where you have to start completion: // https://mariadb.com/kb/en/library/mariadb-error-codes/
// Generated using:
/*
extern crate reqwest;
extern crate select;

use std::io::Read;
use select::document::Document;
use select::predicate::{Child, Class, Name};
use std::collections::HashMap;

fn main() {
    let mut resp = reqwest::get("https://mariadb.com/kb/en/library/mariadb-error-codes/").unwrap();
    assert!(resp.status().is_success());

    let mut content = String::new();
    resp.read_to_string(&mut content).unwrap();

    let mut es = Vec::new();
    let document = Document::from(&*content);
    for tbl in document.find(Child(Class("cstm-style"), Name("table"))) {
        for row in tbl.find(Child(Name("tbody"), Name("tr"))) {
            let cols: Vec<_> = row.find(Name("td")).map(|c| c.text()).collect();
            if cols.is_empty() {
                // THs (because *someone* didn't learn about thead)
                continue;
            }

            let code = u16::from_str_radix(&cols[0], 10).unwrap();
            if code >= 1900 {
                // MariaDB-specific
                continue;
            }

            let mut cols = cols.into_iter();
            cols.next().unwrap(); // code
            let mut sqlstate = cols.next().unwrap();
            let name = if sqlstate.starts_with("ER_") {
                // someone messed up
                ::std::mem::replace(&mut sqlstate, "HY000".to_owned())
            } else {
                cols.next().unwrap()
            };
            le
    
fn main() {
    let mut resp = reqwest::get("https://mariadb.com/kb/en/library/mariadb-error-codes/").unwrap();
    assert!(resp.status().is_success());

    let mut content = String::new();
    resp.read_to_string(&mut content).unwrap();

    let mut es = Vec::new();
    let document = Document::from(&*content);
    for tbl in document.find(Child(Class("cstm-style"), Name("table"))) {
        for row in tbl.find(Child(Name("tbody"), Name("tr"))) {
            let cols: Vec<_> = row.find(Name("td")).map(|c| c.text()).collect();
            if cols.is_empty() {
                // THs (because *someone* didn't learn about thead)
                continue;
            }

            let code = u16::from_str_radix(&cols[0], 10).unwrap();
            if code >= 1900 {
                // MariaDB-specific
                continue;
            }

            let mut cols = cols.into_iter();
            cols.next().unwrap(); // code
            let mut sqlstate = cols.next().unwrap();
            let name = if sqlstate.starts_with("ER_") {
                // someone messed up
                ::std::mem::replace(&mut sqlstate, "HY000".to_owned())
            } else {
                cols.next().unwrap()
            };
            let name = name.replace(" ", "");
            match &*name {
                "ER_CONST_EXPR_IN_PARTITION_FUNC_ERROR"
                | "ER_GTID_MODE_2_OR_3_REQUIRES_ENFORCE_GTID_CONSISTENCY_ON" => {
                    // defined twice, because of course
                    continue;
                }
                _ => {}
            }
            let desc = cols.next().unwrap();
            es.push((code, sqlstate, name, desc));
        }
    }

    println!("/// MySQL error type");
    println!("#[allow(non_camel_case_types)]");
    println!("#[derive(Clone, Copy, Eq, PartialEq, Debug, Hash, Ord, PartialOrd)]");
    println!("#[repr(u16)]");
    println!("pub enum ErrorKind {{");
    for &(code, _, ref name, ref desc) in &es {
        for l in desc.lines() {
            println!("    /// {}", l);
        }
        println!("    {} = {},", name, code);
    }
    println!("}}");
    println!("");
    println!("impl From<u16> for ErrorKind {{");
    println!("    fn from(x: u16) -> Self {{");
    println!("        match x {{");
    for &(code, _, ref name, _) in &es {
        println!("            {}_u16 => ErrorKind::{},", code, name);
    }
    println!("            _ => panic!(\"Unknown error type {{}}\", x),");
    println!("        }}");
    println!("    }}");
    println!("}}");
    println!("");
    println!("impl ErrorKind {{");
    println!("    /// SQLSTATE is a code which identifies SQL error conditions. It composed by five characters:");
    println!("    /// first two characters that indicate a class, and then three that indicate a subclass.");
    println!("    ///");
    println!("    /// There are three important standard classes.");
    println!("    ///");
    println!("    ///  - `00` means the operation completed successfully.");
    println!("    ///  - `01` contains warnings (`SQLWARNING`).");
    println!("    ///  - `02` is the `NOT FOUND` class.");
    println!("    ///");
    println!("    /// All other classes are exceptions (`SQLEXCEPTION`). Classes beginning with 0, 1, 2, 3, 4, A,");
    println!("    /// B, C, D, E, F and G are reserved for standard-defined classes, while other classes are");
    println!("    /// vendor-specific.");
    println!("    ///");
    println!("    /// The subclass, if it is set, indicates a particular condition, or a particular group of");
    println!("    /// conditions within the class. `000` means 'no subclass'.");
    println!("    ///");
    println!("    /// See also https://mariadb.com/kb/en/library/sqlstate/");
    println!("    pub fn sqlstate(&self) -> &'static [u8; 5] {{");
    println!("        match *self {{");
    let mut group = HashMap::new();
    for &(_, ref sqlstate, ref name, _) in &es {
        group.entry(sqlstate).or_insert_with(Vec::new).push(name);
    }
    for (sqlstate, names) in group {
        let n = names.len();
        for (i, name) in names.into_iter().enumerate() {
            print!("            ");
            if i != 0 {
                print!("| ");
            }
            print!("ErrorKind::{}", name);
            if i == n - 1 {
                print!(" => b\"{}\",", sqlstate);
            }
            println!("");
        }
    }
    println!("        }}");
    println!("    }}");
    println!("}}");
}