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use std::fmt;
use std::ops::{Deref,DerefMut};
use std::convert::From;
use std::iter::IntoIterator;
pub struct SingleQuotedStr<'a> {
s: &'a str
}
impl<'b> From<&'b str> for SingleQuotedStr<'b> {
fn from(i: &str) -> SingleQuotedStr {
SingleQuotedStr { s: i }
}
}
impl<'a> fmt::Display for SingleQuotedStr<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut elems = self.s.split('\'');
let fst = elems.next().unwrap_or("");
try!(write!(f, "'{}", fst));
for elem in elems {
try!(write!(f, "'\\''{}", elem));
}
write!(f, "'")
}
}
impl<'a> Deref for SingleQuotedStr<'a> {
type Target = str;
fn deref(&self) -> &Self::Target {
self.s
}
}
pub struct Seperated<'a, D: fmt::Display, X: fmt::Display, I: IntoIterator<Item=X> + 'a> {
sep: D,
inner: &'a Fn() -> I,
}
impl<'a, D: fmt::Display, X: fmt::Display, I: IntoIterator<Item=X>> fmt::Display for Seperated<'a, D, X, I> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for ref i in (self.inner)() {
try!(write!(f, "{}{}", i, self.sep));
}
Ok(())
}
}
impl<'a, D: fmt::Display, X: fmt::Display, I: IntoIterator<Item=X> + 'a> Seperated<'a, D, X, I> {
pub fn new(sep: D, inner: &'a Fn() -> I) -> Self {
Seperated { sep: sep, inner: inner }
}
}
#[derive(Clone, PartialEq, Eq)]
pub struct Hs<T>(pub T);
impl<T: Deref<Target=[u8]>> fmt::Display for Hs<T> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
for e in &self.0[..] {
try!(write!(fmt, "{:02x}", e));
}
Ok(())
}
}
impl<T: Deref<Target=[u8]>> fmt::Debug for Hs<T> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(fmt, "{}", self)
}
}
impl<T> Deref for Hs<T> {
type Target = T;
fn deref(&self) -> &Self::Target
{
&self.0
}
}
impl<T> DerefMut for Hs<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
#[derive(Clone, PartialEq, Eq)]
pub struct AsciiStr<T>(pub T);
impl<T: AsRef<[u8]>> fmt::Display for AsciiStr<T> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
let v = self.0.as_ref();
try!(write!(fmt, "\""));
for e in v {
match *e {
b'"' => try!(write!(fmt, "\\\"")),
0x20...0x7E => try!(write!(fmt, "{}", *e as char)),
_ => try!(write!(fmt, "\\x{:02x}", e))
}
}
try!(write!(fmt, "\""));
Ok(())
}
}
impl<T: AsRef<[u8]>> fmt::Debug for AsciiStr<T> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(fmt, "{}", self)
}
}
impl<T> Deref for AsciiStr<T> {
type Target = T;
fn deref(&self) -> &Self::Target
{
&self.0
}
}
impl<T> DerefMut for AsciiStr<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
#[test]
fn test_asciistr() {
assert_eq!(format!("{}", AsciiStr(&b"hello\x88"[..])), "\"hello\\x88\"");
assert_eq!(format!("{}", AsciiStr(&b"hello\"\x88"[..])), "\"hello\\\"\\x88\"");
}
#[test]
fn test_hs() {
assert_eq!(format!("{}", Hs(&b"hello"[..])), "68656c6c6f");
}
#[test]
fn test_sqs() {
assert_eq!(format!("{}", SingleQuotedStr::from("'")), "''\\'''");
assert_eq!(format!("{}", SingleQuotedStr::from("a")), "'a'");
}
#[test]
fn test_sep() {
let x = [1, 2, 3];
assert_eq!(format!("{}", Seperated::new(' ', &|| x.iter())), "1 2 3 ");
}