Deleted vendor folder

1 files changed, 0 insertions, 687 deletions

diff --git a/vendor/encode_unicode/src/utf16_char.rs b/vendor/encode_unicode/src/utf16_char.rs
deleted file mode 100644
index d8a6cec..0000000
--- a/vendor/encode_unicode/src/utf16_char.rs
+++ /dev/null
@@ -1,687 +0,0 @@
-/* Copyright 2016 The encode_unicode Developers
- *
- * Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
- * http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
- * http://opensource.org/licenses/MIT>, at your option. This file may not be
- * copied, modified, or distributed except according to those terms.
- */
-
-use utf16_iterators::Utf16Iterator;
-use traits::{CharExt, U16UtfExt};
-use utf8_char::Utf8Char;
-use errors::{InvalidUtf16Slice, InvalidUtf16Array, InvalidUtf16Tuple};
-use errors::{NonBMPError, EmptyStrError, FromStrError};
-extern crate core;
-use self::core::{hash,fmt};
-use self::core::cmp::Ordering;
-use self::core::borrow::Borrow;
-use self::core::ops::Deref;
-use self::core::str::FromStr;
-#[cfg(feature="std")]
-use self::core::iter::FromIterator;
-#[cfg(feature="std")]
-#[allow(deprecated)]
-use std::ascii::AsciiExt;
-#[cfg(feature="ascii")]
-use self::core::char;
-#[cfg(feature="ascii")]
-extern crate ascii;
-#[cfg(feature="ascii")]
-use self::ascii::{AsciiChar,ToAsciiChar,ToAsciiCharError};
-
-
-// I don't think there is any good default value for char, but char does.
-#[derive(Default)]
-// char doesn't do anything more advanced than u32 for Eq/Ord, so we shouldn't either.
-// When it's a single unit, the second is zero, so Eq works.
-// #[derive(Ord)] however, breaks on surrogate pairs.
-#[derive(PartialEq,Eq)]
-#[derive(Clone,Copy)]
-
-
-/// An unicode codepoint stored as UTF-16.
-///
-/// It can be borrowed as an `u16` slice, and has the same size as `char`.
-pub struct Utf16Char {
-    units: [u16; 2],
-}
-
-
-  /////////////////////
- //conversion traits//
-/////////////////////
-impl FromStr for Utf16Char {
-    type Err = FromStrError;
-    /// Create an `Utf16Char` from a string slice.
-    /// The string must contain exactly one codepoint.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use encode_unicode::error::FromStrError::*;
-    /// use encode_unicode::Utf16Char;
-    /// use std::str::FromStr;
-    ///
-    /// assert_eq!(Utf16Char::from_str("a"), Ok(Utf16Char::from('a')));
-    /// assert_eq!(Utf16Char::from_str("🂠"), Ok(Utf16Char::from('🂠')));
-    /// assert_eq!(Utf16Char::from_str(""), Err(Empty));
-    /// assert_eq!(Utf16Char::from_str("ab"), Err(MultipleCodepoints));
-    /// assert_eq!(Utf16Char::from_str("é"), Err(MultipleCodepoints));// 'e'+u301 combining mark
-    /// ```
-    fn from_str(s: &str) -> Result<Self, FromStrError> {
-        match Utf16Char::from_str_start(s) {
-            Ok((u16c,bytes)) if bytes == s.len() => Ok(u16c),
-            Ok((_,_)) => Err(FromStrError::MultipleCodepoints),
-            Err(EmptyStrError) => Err(FromStrError::Empty),
-        }
-    }
-}
-impl From<char> for Utf16Char {
-    fn from(c: char) -> Self {
-        let (first, second) = c.to_utf16_tuple();
-        Utf16Char{ units: [first, second.unwrap_or(0)] }
-    }
-}
-impl From<Utf8Char> for Utf16Char {
-    fn from(utf8: Utf8Char) -> Utf16Char {
-        let (b, utf8_len) = utf8.to_array();
-        match utf8_len {
-            1 => Utf16Char{ units: [b[0] as u16, 0] },
-            4 => {// need surrogate
-                let mut first = 0xd800 - (0x01_00_00u32 >> 10) as u16;
-                first += (b[0] as u16 & 0x07) << 8;
-                first += (b[1] as u16 & 0x3f) << 2;
-                first += (b[2] as u16 & 0x30) >> 4;
-                let mut second = 0xdc00;
-                second |= (b[2] as u16 & 0x0f) << 6;
-                second |=  b[3] as u16 & 0x3f;
-                Utf16Char{ units: [first, second] }
-            },
-            _ => { // 2 or 3
-                let mut unit = ((b[0] as u16 & 0x1f) << 6) | (b[1] as u16 & 0x3f);
-                if utf8_len == 3 {
-                    unit = (unit << 6) | (b[2] as u16 & 0x3f);
-                }
-                Utf16Char{ units: [unit, 0] }
-            },
-        }
-    }
-}
-impl From<Utf16Char> for char {
-    fn from(uc: Utf16Char) -> char {
-        char::from_utf16_array_unchecked(uc.to_array())
-    }
-}
-impl IntoIterator for Utf16Char {
-    type Item=u16;
-    type IntoIter=Utf16Iterator;
-    /// Iterate over the units.
-    fn into_iter(self) -> Utf16Iterator {
-        Utf16Iterator::from(self)
-    }
-}
-
-#[cfg(feature="std")]
-impl Extend<Utf16Char> for Vec<u16> {
-    fn extend<I:IntoIterator<Item=Utf16Char>>(&mut self,  iter: I) {
-        let iter = iter.into_iter();
-        self.reserve(iter.size_hint().0);
-        for u16c in iter {
-            self.push(u16c.units[0]);
-            if u16c.units[1] != 0 {
-                self.push(u16c.units[1]);
-            }
-        }
-    }
-}
-#[cfg(feature="std")]
-impl<'a> Extend<&'a Utf16Char> for Vec<u16> {
-    fn extend<I:IntoIterator<Item=&'a Utf16Char>>(&mut self,  iter: I) {
-        self.extend(iter.into_iter().cloned())
-    }
-}
-#[cfg(feature="std")]
-impl FromIterator<Utf16Char> for Vec<u16> {
-    fn from_iter<I:IntoIterator<Item=Utf16Char>>(iter: I) -> Self {
-        let mut vec = Vec::new();
-        vec.extend(iter);
-        return vec;
-    }
-}
-#[cfg(feature="std")]
-impl<'a> FromIterator<&'a Utf16Char> for Vec<u16> {
-    fn from_iter<I:IntoIterator<Item=&'a Utf16Char>>(iter: I) -> Self {
-        Self::from_iter(iter.into_iter().cloned())
-    }
-}
-
-#[cfg(feature="std")]
-impl Extend<Utf16Char> for String {
-    fn extend<I:IntoIterator<Item=Utf16Char>>(&mut self,  iter: I) {
-        self.extend(iter.into_iter().map(|u16c| Utf8Char::from(u16c) ));
-    }
-}
-#[cfg(feature="std")]
-impl<'a> Extend<&'a Utf16Char> for String {
-    fn extend<I:IntoIterator<Item=&'a Utf16Char>>(&mut self,  iter: I) {
-        self.extend(iter.into_iter().cloned());
-    }
-}
-#[cfg(feature="std")]
-impl FromIterator<Utf16Char> for String {
-    fn from_iter<I:IntoIterator<Item=Utf16Char>>(iter: I) -> Self {
-        let mut s = String::new();
-        s.extend(iter);
-        return s;
-    }
-}
-#[cfg(feature="std")]
-impl<'a> FromIterator<&'a Utf16Char> for String {
-    fn from_iter<I:IntoIterator<Item=&'a Utf16Char>>(iter: I) -> Self {
-        Self::from_iter(iter.into_iter().cloned())
-    }
-}
-
-
-  /////////////////
- //getter traits//
-/////////////////
-impl AsRef<[u16]> for Utf16Char {
-    #[inline]
-    fn as_ref(&self) -> &[u16] {
-        &self.units[..self.len()]
-    }
-}
-impl Borrow<[u16]> for Utf16Char {
-    #[inline]
-    fn borrow(&self) -> &[u16] {
-        self.as_ref()
-    }
-}
-impl Deref for Utf16Char {
-    type Target = [u16];
-    #[inline]
-    fn deref(&self) -> &[u16] {
-        self.as_ref()
-    }
-}
-
-
-  ////////////////
- //ascii traits//
-////////////////
-#[cfg(feature="std")]
-#[allow(deprecated)]
-impl AsciiExt for Utf16Char {
-    type Owned = Self;
-    fn is_ascii(&self) -> bool {
-        self.units[0] < 128
-    }
-    fn eq_ignore_ascii_case(&self,  other: &Self) -> bool {
-        self.to_ascii_lowercase() == other.to_ascii_lowercase()
-    }
-    fn to_ascii_uppercase(&self) -> Self {
-        let n = self.units[0].wrapping_sub(b'a' as u16);
-        if n < 26 {Utf16Char{ units: [n+b'A' as u16, 0] }}
-        else      {*self}
-    }
-    fn to_ascii_lowercase(&self) -> Self {
-        let n = self.units[0].wrapping_sub(b'A' as u16);
-        if n < 26 {Utf16Char{ units: [n+b'a' as u16, 0] }}
-        else      {*self}
-    }
-    fn make_ascii_uppercase(&mut self) {
-        *self = self.to_ascii_uppercase()
-    }
-    fn make_ascii_lowercase(&mut self) {
-        *self = self.to_ascii_lowercase();
-    }
-}
-
-#[cfg(feature="ascii")]
-/// Requires the feature "ascii".
-impl From<AsciiChar> for Utf16Char {
-    #[inline]
-    fn from(ac: AsciiChar) -> Self {
-        Utf16Char{ units: [ac.as_byte() as u16, 0] }
-    }
-}
-#[cfg(feature="ascii")]
-/// Requires the feature "ascii".
-impl ToAsciiChar for Utf16Char {
-    #[inline]
-    fn to_ascii_char(self) -> Result<AsciiChar, ToAsciiCharError> {
-        // ToAsciiCHar is not implemented for u16 in ascii 0.9.0
-        if self.is_ascii() {self.units[0] as u8} else {255}.to_ascii_char()
-    }
-    #[inline]
-    unsafe fn to_ascii_char_unchecked(self) -> AsciiChar {
-        (self.units[0] as u8).to_ascii_char_unchecked()
-    }
-}
-
-
-  /////////////////////////////////////////////////////////
- //Genaral traits that cannot be derived to emulate char//
-/////////////////////////////////////////////////////////
-impl hash::Hash for Utf16Char {
-    fn hash<H : hash::Hasher>(&self,  state: &mut H) {
-        self.to_char().hash(state);
-    }
-}
-impl fmt::Debug for Utf16Char {
-    fn fmt(&self,  fmtr: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(&self.to_char(), fmtr)
-    }
-}
-impl fmt::Display for Utf16Char {
-    fn fmt(&self,  fmtr: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&Utf8Char::from(*self), fmtr)
-    }
-}
-// Cannot derive these impls because two-unit characters must always compare
-// greater than one-unit ones.
-impl PartialOrd for Utf16Char {
-    #[inline]
-    fn partial_cmp(&self,  rhs: &Self) -> Option<Ordering> {
-        Some(self.cmp(rhs))
-    }
-}
-impl Ord for Utf16Char {
-    #[inline]
-    fn cmp(&self,  rhs: &Self) -> Ordering {
-        // Shift the first unit by 0xd if surrogate, and 0 otherwise.
-        // This ensures surrogates are always greater than 0xffff, and
-        // that the second unit only affect the result when the first are equal.
-        // Multiplying by a constant factor isn't enough because that factor
-        // would have to be greater than 1023 and smaller than 5.5.
-        // This transformation is less complicated than combine_surrogates().
-        let lhs = (self.units[0] as u32, self.units[1] as u32);
-        let rhs = (rhs.units[0] as u32, rhs.units[1] as u32);
-        let lhs = (lhs.0 << (lhs.1 >> 12)) + lhs.1;
-        let rhs = (rhs.0 << (rhs.1 >> 12)) + rhs.1;
-        lhs.cmp(&rhs)
-    }
-}
-
-
-  ////////////////////////////////
- //Comparisons with other types//
-////////////////////////////////
-impl PartialEq<char> for Utf16Char {
-    fn eq(&self,  u32c: &char) -> bool {
-        *self == Utf16Char::from(*u32c)
-    }
-}
-impl PartialEq<Utf16Char> for char {
-    fn eq(&self,  u16c: &Utf16Char) -> bool {
-        Utf16Char::from(*self) == *u16c
-    }
-}
-impl PartialOrd<char> for Utf16Char {
-    fn partial_cmp(&self,  u32c: &char) -> Option<Ordering> {
-        self.partial_cmp(&Utf16Char::from(*u32c))
-    }
-}
-impl PartialOrd<Utf16Char> for char {
-    fn partial_cmp(&self,  u16c: &Utf16Char) -> Option<Ordering> {
-        Utf16Char::from(*self).partial_cmp(u16c)
-    }
-}
-
-impl PartialEq<Utf8Char> for Utf16Char {
-    fn eq(&self,  u8c: &Utf8Char) -> bool {
-        *self == Utf16Char::from(*u8c)
-    }
-}
-impl PartialOrd<Utf8Char> for Utf16Char {
-    fn partial_cmp(&self,  u8c: &Utf8Char) -> Option<Ordering> {
-        self.partial_cmp(&Utf16Char::from(*u8c))
-    }
-}
-// The other direction is implemented in utf8_char.rs
-
-/// Only considers the unit equal if the codepoint of the `Utf16Char` is not
-/// made up of a surrogate pair.
-///
-/// There is no impl in the opposite direction, as this should only be used to
-/// compare `Utf16Char`s against constants.
-///
-/// # Examples
-///
-/// ```
-/// # use encode_unicode::Utf16Char;
-/// assert!(Utf16Char::from('6') == b'6' as u16);
-/// assert!(Utf16Char::from('\u{FFFF}') == 0xffff_u16);
-/// assert!(Utf16Char::from_tuple((0xd876, Some(0xdef9))).unwrap() != 0xd876_u16);
-/// ```
-impl PartialEq<u16> for Utf16Char {
-    fn eq(&self,  unit: &u16) -> bool {
-        self.units[0] == *unit  &&  self.units[1] == 0
-    }
-}
-/// Only considers the byte equal if the codepoint of the `Utf16Char` is <= U+FF.
-///
-/// # Examples
-///
-/// ```
-/// # use encode_unicode::Utf16Char;
-/// assert!(Utf16Char::from('6') == b'6');
-/// assert!(Utf16Char::from('\u{00FF}') == b'\xff');
-/// assert!(Utf16Char::from('\u{0100}') != b'\0');
-/// ```
-impl PartialEq<u8> for Utf16Char {
-    fn eq(&self,  byte: &u8) -> bool {
-        self.units[0] == *byte as u16
-    }
-}
-#[cfg(feature = "ascii")]
-/// `Utf16Char`s that are not ASCII never compare equal.
-impl PartialEq<AsciiChar> for Utf16Char {
-    #[inline]
-    fn eq(&self,  ascii: &AsciiChar) -> bool {
-        self.units[0] == *ascii as u16
-    }
-}
-#[cfg(feature = "ascii")]
-/// `Utf16Char`s that are not ASCII never compare equal.
-impl PartialEq<Utf16Char> for AsciiChar {
-    #[inline]
-    fn eq(&self,  u16c: &Utf16Char) -> bool {
-        *self as u16 == u16c.units[0]
-    }
-}
-#[cfg(feature = "ascii")]
-/// `Utf16Char`s that are not ASCII always compare greater.
-impl PartialOrd<AsciiChar> for Utf16Char {
-    #[inline]
-    fn partial_cmp(&self,  ascii: &AsciiChar) -> Option<Ordering> {
-        self.units[0].partial_cmp(&(*ascii as u16))
-    }
-}
-#[cfg(feature = "ascii")]
-/// `Utf16Char`s that are not ASCII always compare greater.
-impl PartialOrd<Utf16Char> for AsciiChar {
-    #[inline]
-    fn partial_cmp(&self,  u16c: &Utf16Char) -> Option<Ordering> {
-        (*self as u16).partial_cmp(&u16c.units[0])
-    }
-}
-
-
-  ///////////////////////////////////////////////////////
- //pub impls that should be together for nicer rustdoc//
-///////////////////////////////////////////////////////
-impl Utf16Char {
-    /// Create an `Utf16Char` from the first codepoint in a string slice,
-    /// converting from UTF-8 to UTF-16.
-    ///
-    /// The returned `usize` is the number of UTF-8 bytes used from the str,
-    /// and not the number of UTF-16 units.
-    ///
-    /// Returns an error if the `str` is empty.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use encode_unicode::Utf16Char;
-    ///
-    /// assert_eq!(Utf16Char::from_str_start("a"), Ok((Utf16Char::from('a'),1)));
-    /// assert_eq!(Utf16Char::from_str_start("ab"), Ok((Utf16Char::from('a'),1)));
-    /// assert_eq!(Utf16Char::from_str_start("🂠 "), Ok((Utf16Char::from('🂠'),4)));
-    /// assert_eq!(Utf16Char::from_str_start("é"), Ok((Utf16Char::from('e'),1)));// 'e'+u301 combining mark
-    /// assert!(Utf16Char::from_str_start("").is_err());
-    /// ```
-    pub fn from_str_start(s: &str) -> Result<(Self,usize), EmptyStrError> {
-        if s.is_empty() {
-            return Err(EmptyStrError);
-        }
-        let b = s.as_bytes();
-        // Read the last byte first to reduce the number of unnecesary length checks.
-        match b[0] {
-            0...127 => {// 1 byte => 1 unit
-                let unit = b[0] as u16;// 0b0000_0000_0xxx_xxxx
-                Ok((Utf16Char{ units: [unit, 0] }, 1))
-            },
-            0b1000_0000...0b1101_1111 => {// 2 bytes => 1 unit
-                let unit = (((b[1] & 0x3f) as u16) << 0) // 0b0000_0000_00xx_xxxx
-                         | (((b[0] & 0x1f) as u16) << 6);// 0b0000_0xxx_xx00_0000
-                Ok((Utf16Char{ units: [unit, 0] }, 2))
-            },
-            0b1110_0000...0b1110_1111 => {// 3 bytes => 1 unit
-                let unit = (((b[2] & 0x3f) as u16) <<  0) // 0b0000_0000_00xx_xxxx
-                         | (((b[1] & 0x3f) as u16) <<  6) // 0b0000_xxxx_xx00_0000
-                         | (((b[0] & 0x0f) as u16) << 12);// 0bxxxx_0000_0000_0000
-                Ok((Utf16Char{ units: [unit, 0] }, 3))
-            },
-            _ => {// 4 bytes => 2 units
-                let second = 0xdc00                        // 0b1101_1100_0000_0000
-                           | (((b[3] & 0x3f) as u16) << 0) // 0b0000_0000_00xx_xxxx
-                           | (((b[2] & 0x0f) as u16) << 6);// 0b0000_00xx_xx00_0000
-                let first = 0xd800-(0x01_00_00u32>>10) as u16// 0b1101_0111_1100_0000
-                          + (((b[2] & 0x30) as u16) >> 4)    // 0b0000_0000_0000_00xx
-                          + (((b[1] & 0x3f) as u16) << 2)    // 0b0000_0000_xxxx_xx00
-                          + (((b[0] & 0x07) as u16) << 8);   // 0b0000_0xxx_0000_0000
-                Ok((Utf16Char{ units: [first, second] }, 4))
-            }
-        }
-    }
-    /// Validate and store the first UTF-16 codepoint in the slice.
-    /// Also return how many units were needed.
-    pub fn from_slice_start(src: &[u16]) -> Result<(Self,usize), InvalidUtf16Slice> {
-        char::from_utf16_slice_start(src).map(|(_,len)| {
-            let second = if len==2 {src[1]} else {0};
-            (Utf16Char{ units: [src[0], second] }, len)
-        })
-    }
-    /// Store the first UTF-16 codepoint of the slice.
-    ///
-    /// # Safety
-    ///
-    /// The slice must be non-empty and start with a valid UTF-16 codepoint.  
-    /// The length of the slice is never checked.
-    pub unsafe fn from_slice_start_unchecked(src: &[u16]) -> (Self,usize) {
-        let first = *src.get_unchecked(0);
-        if first.is_utf16_leading_surrogate() {
-            (Utf16Char{ units: [first, *src.get_unchecked(1)] }, 2)
-        } else {
-            (Utf16Char{ units: [first, 0] }, 1)
-        }
-    }
-    /// Validate and store an UTF-16 array as returned from `char.to_utf16_array()`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use encode_unicode::Utf16Char;
-    /// use encode_unicode::error::InvalidUtf16Array;
-    ///
-    /// assert_eq!(Utf16Char::from_array(['x' as u16, 'y' as u16]), Ok(Utf16Char::from('x')));
-    /// assert_eq!(Utf16Char::from_array(['睷' as u16, 0]), Ok(Utf16Char::from('睷')));
-    /// assert_eq!(Utf16Char::from_array([0xda6f, 0xdcde]), Ok(Utf16Char::from('\u{abcde}')));
-    /// assert_eq!(Utf16Char::from_array([0xf111, 0xdbad]), Ok(Utf16Char::from('\u{f111}')));
-    /// assert_eq!(Utf16Char::from_array([0xdaaf, 0xdaaf]), Err(InvalidUtf16Array::SecondIsNotTrailingSurrogate));
-    /// assert_eq!(Utf16Char::from_array([0xdcac, 0x9000]), Err(InvalidUtf16Array::FirstIsTrailingSurrogate));
-    /// ```
-    pub fn from_array(units: [u16; 2]) -> Result<Self,InvalidUtf16Array> {
-        if (units[0] & 0xf8_00) != 0xd8_00 {
-            Ok(Utf16Char { units: [units[0], 0] })
-        } else if units[0] < 0xdc_00  &&  (units[1] & 0xfc_00) == 0xdc_00 {
-            Ok(Utf16Char { units: units })
-        } else if units[0] < 0xdc_00 {
-            Err(InvalidUtf16Array::SecondIsNotTrailingSurrogate)
-        } else {
-            Err(InvalidUtf16Array::FirstIsTrailingSurrogate)
-        }
-    }
-    /// Create an `Utf16Char` from an array as returned from `char.to_utf16_array()`.
-    ///
-    /// # Safety
-    ///
-    /// The units must form a valid codepoint, and the second unit must be 0
-    /// when a surrogate pair is not required.
-    /// Violating this can easily lead to undefined behavior, although unlike
-    /// `char` bad `Utf16Char`s simply existing is not immediately UB.
-    pub unsafe fn from_array_unchecked(units: [u16; 2]) -> Self {
-        Utf16Char { units: units }
-    }
-    /// Validate and store a UTF-16 pair as returned from `char.to_utf16_tuple()`.
-    pub fn from_tuple(utf16: (u16,Option<u16>)) -> Result<Self,InvalidUtf16Tuple> {
-        unsafe {char::from_utf16_tuple(utf16).map(|_|
-            Self::from_tuple_unchecked(utf16)
-        )}
-    }
-    /// Create an `Utf16Char` from a tuple as returned from `char.to_utf16_tuple()`.
-    ///
-    /// # Safety
-    ///
-    /// The units must form a valid codepoint with the second being 0 when a
-    /// surrogate pair is not required.
-    /// Violating this can easily lead to undefined behavior.
-    pub unsafe fn from_tuple_unchecked(utf16: (u16,Option<u16>)) -> Self {
-        Utf16Char { units: [utf16.0, utf16.1.unwrap_or(0)] }
-    }
-    /// Create an `Utf16Char` from a single unit.
-    ///
-    /// Codepoints < '\u{1_0000}' (which fit in a `u16`) are part of the basic
-    /// multilingual plane unless they are reserved for surrogate pairs.
-    ///
-    /// # Errors
-    ///
-    /// Returns `NonBMPError` if the unit is in the range `0xd800..0xe000`
-    /// (which means that it's part of a surrogat pair)
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// # use encode_unicode::Utf16Char;
-    /// assert_eq!(Utf16Char::from_bmp(0x40).unwrap(), '@');
-    /// assert_eq!(Utf16Char::from_bmp('ø' as u16).unwrap(), 'ø');
-    /// assert!(Utf16Char::from_bmp(0xdddd).is_err());
-    /// ```
-    pub fn from_bmp(bmp_codepoint: u16) -> Result<Self,NonBMPError> {
-        if bmp_codepoint & 0xf800 != 0xd800 {
-            Ok(Utf16Char{ units: [bmp_codepoint, 0] })
-        } else {
-            Err(NonBMPError)
-        }
-    }
-    /// Create an `Utf16Char` from a single unit without checking that it's a
-    /// valid codepoint on its own.
-    ///
-    /// # Safety
-    ///
-    /// The unit must be less than 0xd800 or greater than 0xdfff.
-    /// In other words, not part of a surrogate pair.  
-    /// Violating this can easily lead to undefined behavior.
-    #[inline]
-    pub unsafe fn from_bmp_unchecked(bmp_codepoint: u16) -> Self {
-        Utf16Char{ units: [bmp_codepoint, 0] }
-    }
-    /// Checks that the codepoint is in the basic multilingual plane.
-    ///
-    /// # Examples
-    /// ```
-    /// # use encode_unicode::Utf16Char;
-    /// assert_eq!(Utf16Char::from('e').is_bmp(), true);
-    /// assert_eq!(Utf16Char::from('€').is_bmp(), true);
-    /// assert_eq!(Utf16Char::from('𝔼').is_bmp(), false);
-    /// ```
-    #[inline]
-    pub fn is_bmp(&self) -> bool {
-        self.units[1] == 0
-    }
-
-    /// The number of units this character is made up of.
-    ///
-    /// Is either 1 or 2 and identical to `.as_char().len_utf16()`
-    /// or `.as_ref().len()`.
-    #[inline]
-    pub fn len(self) -> usize {
-        1 + (self.units[1] as usize >> 15)
-    }
-    // There is no `.is_emty()` because it would always return false.
-
-    /// Checks that the codepoint is an ASCII character.
-    #[inline]
-    pub fn is_ascii(&self) -> bool {
-        self.units[0] <= 127
-    }
-    /// Checks that two characters are an ASCII case-insensitive match.
-    ///
-    /// Is equivalent to `a.to_ascii_lowercase() == b.to_ascii_lowercase()`.
-    #[cfg(feature="std")]
-    pub fn eq_ignore_ascii_case(&self,  other: &Self) -> bool {
-        self.to_ascii_lowercase() == other.to_ascii_lowercase()
-    }
-    /// Converts the character to its ASCII upper case equivalent.
-    ///
-    /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
-    /// but non-ASCII letters are unchanged.
-    #[cfg(feature="std")]
-    pub fn to_ascii_uppercase(&self) -> Self {
-        let n = self.units[0].wrapping_sub(b'a' as u16);
-        if n < 26 {Utf16Char{ units: [n+b'A' as u16, 0] }}
-        else      {*self}
-    }
-    /// Converts the character to its ASCII lower case equivalent.
-    ///
-    /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
-    /// but non-ASCII letters are unchanged.
-    #[cfg(feature="std")]
-    pub fn to_ascii_lowercase(&self) -> Self {
-        let n = self.units[0].wrapping_sub(b'A' as u16);
-        if n < 26 {Utf16Char{ units: [n+b'a' as u16, 0] }}
-        else      {*self}
-    }
-    /// Converts the character to its ASCII upper case equivalent in-place.
-    ///
-    /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
-    /// but non-ASCII letters are unchanged.
-    #[cfg(feature="std")]
-    pub fn make_ascii_uppercase(&mut self) {
-        *self = self.to_ascii_uppercase()
-    }
-    /// Converts the character to its ASCII lower case equivalent in-place.
-    ///
-    /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
-    /// but non-ASCII letters are unchanged.
-    #[cfg(feature="std")]
-    pub fn make_ascii_lowercase(&mut self) {
-        *self = self.to_ascii_lowercase();
-    }
-
-    /// Convert from UTF-16 to UTF-32
-    pub fn to_char(self) -> char {
-        self.into()
-    }
-    /// Write the internal representation to a slice,
-    /// and then returns the number of `u16`s written.
-    ///
-    /// # Panics
-    /// Will panic the buffer is too small;
-    /// You can get the required length from `.len()`,
-    /// but a buffer of length two is always large enough.
-    pub fn to_slice(self,  dst: &mut[u16]) -> usize {
-        // Write the last unit first to avoid repeated length checks.
-        let extra = self.units[1] as usize >> 15;
-        match dst.get_mut(extra) {
-            Some(first) => *first = self.units[extra],
-            None => panic!("The provided buffer is too small.")
-        }
-        if extra != 0 {dst[0] = self.units[0];}
-        extra+1
-    }
-    /// Get the character represented as an array of two units.
-    ///
-    /// The second `u16` is zero for codepoints that fit in one unit.
-    #[inline]
-    pub fn to_array(self) -> [u16;2] {
-        self.units
-    }
-    /// The second `u16` is used for surrogate pairs.
-    #[inline]
-    pub fn to_tuple(self) -> (u16,Option<u16>) {
-        (self.units[0],  if self.units[1]==0 {None} else {Some(self.units[1])})
-    }
-}