Move the rest of core::unicode::char to core::unicode

2 files changed, 0 insertions, 1438 deletions

diff --git a/src/libcore/unicode/char.rs b/src/libcore/unicode/char.rs
deleted file mode 100644
index fda1914a50f..00000000000
--- a/src/libcore/unicode/char.rs
+++ /dev/null
@@ -1,1437 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.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.
-
-//! A character type.
-//!
-//! The `char` type represents a single character. More specifically, since
-//! 'character' isn't a well-defined concept in Unicode, `char` is a '[Unicode
-//! scalar value]', which is similar to, but not the same as, a '[Unicode code
-//! point]'.
-//!
-//! [Unicode scalar value]: http://www.unicode.org/glossary/#unicode_scalar_value
-//! [Unicode code point]: http://www.unicode.org/glossary/#code_point
-//!
-//! This module exists for technical reasons, the primary documentation for
-//! `char` is directly on [the `char` primitive type](../../std/primitive.char.html)
-//! itself.
-//!
-//! This module is the home of the iterator implementations for the iterators
-//! implemented on `char`, as well as some useful constants and conversion
-//! functions that convert various types to `char`.
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-use char::*;
-use char::CharExt as C;
-use iter::FusedIterator;
-use fmt::{self, Write};
-use unicode::tables::{conversions, derived_property, general_category, property};
-
-/// Returns an iterator that yields the lowercase equivalent of a `char`.
-///
-/// This `struct` is created by the [`to_lowercase`] method on [`char`]. See
-/// its documentation for more.
-///
-/// [`to_lowercase`]: ../../std/primitive.char.html#method.to_lowercase
-/// [`char`]: ../../std/primitive.char.html
-#[stable(feature = "rust1", since = "1.0.0")]
-#[derive(Debug, Clone)]
-pub struct ToLowercase(CaseMappingIter);
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl Iterator for ToLowercase {
-    type Item = char;
-    fn next(&mut self) -> Option<char> {
-        self.0.next()
-    }
-}
-
-#[stable(feature = "fused", since = "1.26.0")]
-impl FusedIterator for ToLowercase {}
-
-/// Returns an iterator that yields the uppercase equivalent of a `char`.
-///
-/// This `struct` is created by the [`to_uppercase`] method on [`char`]. See
-/// its documentation for more.
-///
-/// [`to_uppercase`]: ../../std/primitive.char.html#method.to_uppercase
-/// [`char`]: ../../std/primitive.char.html
-#[stable(feature = "rust1", since = "1.0.0")]
-#[derive(Debug, Clone)]
-pub struct ToUppercase(CaseMappingIter);
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl Iterator for ToUppercase {
-    type Item = char;
-    fn next(&mut self) -> Option<char> {
-        self.0.next()
-    }
-}
-
-#[stable(feature = "fused", since = "1.26.0")]
-impl FusedIterator for ToUppercase {}
-
-#[derive(Debug, Clone)]
-enum CaseMappingIter {
-    Three(char, char, char),
-    Two(char, char),
-    One(char),
-    Zero,
-}
-
-impl CaseMappingIter {
-    fn new(chars: [char; 3]) -> CaseMappingIter {
-        if chars[2] == '\0' {
-            if chars[1] == '\0' {
-                CaseMappingIter::One(chars[0])  // Including if chars[0] == '\0'
-            } else {
-                CaseMappingIter::Two(chars[0], chars[1])
-            }
-        } else {
-            CaseMappingIter::Three(chars[0], chars[1], chars[2])
-        }
-    }
-}
-
-impl Iterator for CaseMappingIter {
-    type Item = char;
-    fn next(&mut self) -> Option<char> {
-        match *self {
-            CaseMappingIter::Three(a, b, c) => {
-                *self = CaseMappingIter::Two(b, c);
-                Some(a)
-            }
-            CaseMappingIter::Two(b, c) => {
-                *self = CaseMappingIter::One(c);
-                Some(b)
-            }
-            CaseMappingIter::One(c) => {
-                *self = CaseMappingIter::Zero;
-                Some(c)
-            }
-            CaseMappingIter::Zero => None,
-        }
-    }
-}
-
-impl fmt::Display for CaseMappingIter {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            CaseMappingIter::Three(a, b, c) => {
-                f.write_char(a)?;
-                f.write_char(b)?;
-                f.write_char(c)
-            }
-            CaseMappingIter::Two(b, c) => {
-                f.write_char(b)?;
-                f.write_char(c)
-            }
-            CaseMappingIter::One(c) => {
-                f.write_char(c)
-            }
-            CaseMappingIter::Zero => Ok(()),
-        }
-    }
-}
-
-#[stable(feature = "char_struct_display", since = "1.16.0")]
-impl fmt::Display for ToLowercase {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.0, f)
-    }
-}
-
-#[stable(feature = "char_struct_display", since = "1.16.0")]
-impl fmt::Display for ToUppercase {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.0, f)
-    }
-}
-
-#[lang = "char"]
-impl char {
-    /// Checks if a `char` is a digit in the given radix.
-    ///
-    /// A 'radix' here is sometimes also called a 'base'. A radix of two
-    /// indicates a binary number, a radix of ten, decimal, and a radix of
-    /// sixteen, hexadecimal, to give some common values. Arbitrary
-    /// radices are supported.
-    ///
-    /// Compared to `is_numeric()`, this function only recognizes the characters
-    /// `0-9`, `a-z` and `A-Z`.
-    ///
-    /// 'Digit' is defined to be only the following characters:
-    ///
-    /// * `0-9`
-    /// * `a-z`
-    /// * `A-Z`
-    ///
-    /// For a more comprehensive understanding of 'digit', see [`is_numeric`][is_numeric].
-    ///
-    /// [is_numeric]: #method.is_numeric
-    ///
-    /// # Panics
-    ///
-    /// Panics if given a radix larger than 36.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!('1'.is_digit(10));
-    /// assert!('f'.is_digit(16));
-    /// assert!(!'f'.is_digit(10));
-    /// ```
-    ///
-    /// Passing a large radix, causing a panic:
-    ///
-    /// ```
-    /// use std::thread;
-    ///
-    /// let result = thread::spawn(|| {
-    ///     // this panics
-    ///     '1'.is_digit(37);
-    /// }).join();
-    ///
-    /// assert!(result.is_err());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_digit(self, radix: u32) -> bool {
-        C::is_digit(self, radix)
-    }
-
-    /// Converts a `char` to a digit in the given radix.
-    ///
-    /// A 'radix' here is sometimes also called a 'base'. A radix of two
-    /// indicates a binary number, a radix of ten, decimal, and a radix of
-    /// sixteen, hexadecimal, to give some common values. Arbitrary
-    /// radices are supported.
-    ///
-    /// 'Digit' is defined to be only the following characters:
-    ///
-    /// * `0-9`
-    /// * `a-z`
-    /// * `A-Z`
-    ///
-    /// # Errors
-    ///
-    /// Returns `None` if the `char` does not refer to a digit in the given radix.
-    ///
-    /// # Panics
-    ///
-    /// Panics if given a radix larger than 36.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert_eq!('1'.to_digit(10), Some(1));
-    /// assert_eq!('f'.to_digit(16), Some(15));
-    /// ```
-    ///
-    /// Passing a non-digit results in failure:
-    ///
-    /// ```
-    /// assert_eq!('f'.to_digit(10), None);
-    /// assert_eq!('z'.to_digit(16), None);
-    /// ```
-    ///
-    /// Passing a large radix, causing a panic:
-    ///
-    /// ```
-    /// use std::thread;
-    ///
-    /// let result = thread::spawn(|| {
-    ///     '1'.to_digit(37);
-    /// }).join();
-    ///
-    /// assert!(result.is_err());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn to_digit(self, radix: u32) -> Option<u32> {
-        C::to_digit(self, radix)
-    }
-
-    /// Returns an iterator that yields the hexadecimal Unicode escape of a
-    /// character as `char`s.
-    ///
-    /// This will escape characters with the Rust syntax of the form
-    /// `\u{NNNNNN}` where `NNNNNN` is a hexadecimal representation.
-    ///
-    /// # Examples
-    ///
-    /// As an iterator:
-    ///
-    /// ```
-    /// for c in '❤'.escape_unicode() {
-    ///     print!("{}", c);
-    /// }
-    /// println!();
-    /// ```
-    ///
-    /// Using `println!` directly:
-    ///
-    /// ```
-    /// println!("{}", '❤'.escape_unicode());
-    /// ```
-    ///
-    /// Both are equivalent to:
-    ///
-    /// ```
-    /// println!("\\u{{2764}}");
-    /// ```
-    ///
-    /// Using `to_string`:
-    ///
-    /// ```
-    /// assert_eq!('❤'.escape_unicode().to_string(), "\\u{2764}");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn escape_unicode(self) -> EscapeUnicode {
-        C::escape_unicode(self)
-    }
-
-    /// Returns an iterator that yields the literal escape code of a character
-    /// as `char`s.
-    ///
-    /// This will escape the characters similar to the `Debug` implementations
-    /// of `str` or `char`.
-    ///
-    /// # Examples
-    ///
-    /// As an iterator:
-    ///
-    /// ```
-    /// for c in '\n'.escape_debug() {
-    ///     print!("{}", c);
-    /// }
-    /// println!();
-    /// ```
-    ///
-    /// Using `println!` directly:
-    ///
-    /// ```
-    /// println!("{}", '\n'.escape_debug());
-    /// ```
-    ///
-    /// Both are equivalent to:
-    ///
-    /// ```
-    /// println!("\\n");
-    /// ```
-    ///
-    /// Using `to_string`:
-    ///
-    /// ```
-    /// assert_eq!('\n'.escape_debug().to_string(), "\\n");
-    /// ```
-    #[stable(feature = "char_escape_debug", since = "1.20.0")]
-    #[inline]
-    pub fn escape_debug(self) -> EscapeDebug {
-        C::escape_debug(self)
-    }
-
-    /// Returns an iterator that yields the literal escape code of a character
-    /// as `char`s.
-    ///
-    /// The default is chosen with a bias toward producing literals that are
-    /// legal in a variety of languages, including C++11 and similar C-family
-    /// languages. The exact rules are:
-    ///
-    /// * Tab is escaped as `\t`.
-    /// * Carriage return is escaped as `\r`.
-    /// * Line feed is escaped as `\n`.
-    /// * Single quote is escaped as `\'`.
-    /// * Double quote is escaped as `\"`.
-    /// * Backslash is escaped as `\\`.
-    /// * Any character in the 'printable ASCII' range `0x20` .. `0x7e`
-    ///   inclusive is not escaped.
-    /// * All other characters are given hexadecimal Unicode escapes; see
-    ///   [`escape_unicode`][escape_unicode].
-    ///
-    /// [escape_unicode]: #method.escape_unicode
-    ///
-    /// # Examples
-    ///
-    /// As an iterator:
-    ///
-    /// ```
-    /// for c in '"'.escape_default() {
-    ///     print!("{}", c);
-    /// }
-    /// println!();
-    /// ```
-    ///
-    /// Using `println!` directly:
-    ///
-    /// ```
-    /// println!("{}", '"'.escape_default());
-    /// ```
-    ///
-    ///
-    /// Both are equivalent to:
-    ///
-    /// ```
-    /// println!("\\\"");
-    /// ```
-    ///
-    /// Using `to_string`:
-    ///
-    /// ```
-    /// assert_eq!('"'.escape_default().to_string(), "\\\"");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn escape_default(self) -> EscapeDefault {
-        C::escape_default(self)
-    }
-
-    /// Returns the number of bytes this `char` would need if encoded in UTF-8.
-    ///
-    /// That number of bytes is always between 1 and 4, inclusive.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// let len = 'A'.len_utf8();
-    /// assert_eq!(len, 1);
-    ///
-    /// let len = 'ß'.len_utf8();
-    /// assert_eq!(len, 2);
-    ///
-    /// let len = 'ℝ'.len_utf8();
-    /// assert_eq!(len, 3);
-    ///
-    /// let len = '💣'.len_utf8();
-    /// assert_eq!(len, 4);
-    /// ```
-    ///
-    /// The `&str` type guarantees that its contents are UTF-8, and so we can compare the length it
-    /// would take if each code point was represented as a `char` vs in the `&str` itself:
-    ///
-    /// ```
-    /// // as chars
-    /// let eastern = '東';
-    /// let capitol = '京';
-    ///
-    /// // both can be represented as three bytes
-    /// assert_eq!(3, eastern.len_utf8());
-    /// assert_eq!(3, capitol.len_utf8());
-    ///
-    /// // as a &str, these two are encoded in UTF-8
-    /// let tokyo = "東京";
-    ///
-    /// let len = eastern.len_utf8() + capitol.len_utf8();
-    ///
-    /// // we can see that they take six bytes total...
-    /// assert_eq!(6, tokyo.len());
-    ///
-    /// // ... just like the &str
-    /// assert_eq!(len, tokyo.len());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn len_utf8(self) -> usize {
-        C::len_utf8(self)
-    }
-
-    /// Returns the number of 16-bit code units this `char` would need if
-    /// encoded in UTF-16.
-    ///
-    /// See the documentation for [`len_utf8`] for more explanation of this
-    /// concept. This function is a mirror, but for UTF-16 instead of UTF-8.
-    ///
-    /// [`len_utf8`]: #method.len_utf8
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// let n = 'ß'.len_utf16();
-    /// assert_eq!(n, 1);
-    ///
-    /// let len = '💣'.len_utf16();
-    /// assert_eq!(len, 2);
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn len_utf16(self) -> usize {
-        C::len_utf16(self)
-    }
-
-    /// Encodes this character as UTF-8 into the provided byte buffer,
-    /// and then returns the subslice of the buffer that contains the encoded character.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the buffer is not large enough.
-    /// A buffer of length four is large enough to encode any `char`.
-    ///
-    /// # Examples
-    ///
-    /// In both of these examples, 'ß' takes two bytes to encode.
-    ///
-    /// ```
-    /// let mut b = [0; 2];
-    ///
-    /// let result = 'ß'.encode_utf8(&mut b);
-    ///
-    /// assert_eq!(result, "ß");
-    ///
-    /// assert_eq!(result.len(), 2);
-    /// ```
-    ///
-    /// A buffer that's too small:
-    ///
-    /// ```
-    /// use std::thread;
-    ///
-    /// let result = thread::spawn(|| {
-    ///     let mut b = [0; 1];
-    ///
-    ///     // this panics
-    ///    'ß'.encode_utf8(&mut b);
-    /// }).join();
-    ///
-    /// assert!(result.is_err());
-    /// ```
-    #[stable(feature = "unicode_encode_char", since = "1.15.0")]
-    #[inline]
-    pub fn encode_utf8(self, dst: &mut [u8]) -> &mut str {
-        C::encode_utf8(self, dst)
-    }
-
-    /// Encodes this character as UTF-16 into the provided `u16` buffer,
-    /// and then returns the subslice of the buffer that contains the encoded character.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the buffer is not large enough.
-    /// A buffer of length 2 is large enough to encode any `char`.
-    ///
-    /// # Examples
-    ///
-    /// In both of these examples, '𝕊' takes two `u16`s to encode.
-    ///
-    /// ```
-    /// let mut b = [0; 2];
-    ///
-    /// let result = '𝕊'.encode_utf16(&mut b);
-    ///
-    /// assert_eq!(result.len(), 2);
-    /// ```
-    ///
-    /// A buffer that's too small:
-    ///
-    /// ```
-    /// use std::thread;
-    ///
-    /// let result = thread::spawn(|| {
-    ///     let mut b = [0; 1];
-    ///
-    ///     // this panics
-    ///     '𝕊'.encode_utf16(&mut b);
-    /// }).join();
-    ///
-    /// assert!(result.is_err());
-    /// ```
-    #[stable(feature = "unicode_encode_char", since = "1.15.0")]
-    #[inline]
-    pub fn encode_utf16(self, dst: &mut [u16]) -> &mut [u16] {
-        C::encode_utf16(self, dst)
-    }
-
-    /// Returns true if this `char` is an alphabetic code point, and false if not.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!('a'.is_alphabetic());
-    /// assert!('京'.is_alphabetic());
-    ///
-    /// let c = '💝';
-    /// // love is many things, but it is not alphabetic
-    /// assert!(!c.is_alphabetic());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_alphabetic(self) -> bool {
-        match self {
-            'a'...'z' | 'A'...'Z' => true,
-            c if c > '\x7f' => derived_property::Alphabetic(c),
-            _ => false,
-        }
-    }
-
-    /// Returns true if this `char` satisfies the 'XID_Start' Unicode property, and false
-    /// otherwise.
-    ///
-    /// 'XID_Start' is a Unicode Derived Property specified in
-    /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
-    /// mostly similar to `ID_Start` but modified for closure under `NFKx`.
-    #[unstable(feature = "rustc_private",
-               reason = "mainly needed for compiler internals",
-               issue = "27812")]
-    #[inline]
-    pub fn is_xid_start(self) -> bool {
-        derived_property::XID_Start(self)
-    }
-
-    /// Returns true if this `char` satisfies the 'XID_Continue' Unicode property, and false
-    /// otherwise.
-    ///
-    /// 'XID_Continue' is a Unicode Derived Property specified in
-    /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
-    /// mostly similar to 'ID_Continue' but modified for closure under NFKx.
-    #[unstable(feature = "rustc_private",
-               reason = "mainly needed for compiler internals",
-               issue = "27812")]
-    #[inline]
-    pub fn is_xid_continue(self) -> bool {
-        derived_property::XID_Continue(self)
-    }
-
-    /// Returns true if this `char` is lowercase, and false otherwise.
-    ///
-    /// 'Lowercase' is defined according to the terms of the Unicode Derived Core
-    /// Property `Lowercase`.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!('a'.is_lowercase());
-    /// assert!('δ'.is_lowercase());
-    /// assert!(!'A'.is_lowercase());
-    /// assert!(!'Δ'.is_lowercase());
-    ///
-    /// // The various Chinese scripts do not have case, and so:
-    /// assert!(!'中'.is_lowercase());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_lowercase(self) -> bool {
-        match self {
-            'a'...'z' => true,
-            c if c > '\x7f' => derived_property::Lowercase(c),
-            _ => false,
-        }
-    }
-
-    /// Returns true if this `char` is uppercase, and false otherwise.
-    ///
-    /// 'Uppercase' is defined according to the terms of the Unicode Derived Core
-    /// Property `Uppercase`.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!(!'a'.is_uppercase());
-    /// assert!(!'δ'.is_uppercase());
-    /// assert!('A'.is_uppercase());
-    /// assert!('Δ'.is_uppercase());
-    ///
-    /// // The various Chinese scripts do not have case, and so:
-    /// assert!(!'中'.is_uppercase());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_uppercase(self) -> bool {
-        match self {
-            'A'...'Z' => true,
-            c if c > '\x7f' => derived_property::Uppercase(c),
-            _ => false,
-        }
-    }
-
-    /// Returns true if this `char` is whitespace, and false otherwise.
-    ///
-    /// 'Whitespace' is defined according to the terms of the Unicode Derived Core
-    /// Property `White_Space`.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!(' '.is_whitespace());
-    ///
-    /// // a non-breaking space
-    /// assert!('\u{A0}'.is_whitespace());
-    ///
-    /// assert!(!'越'.is_whitespace());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_whitespace(self) -> bool {
-        match self {
-            ' ' | '\x09'...'\x0d' => true,
-            c if c > '\x7f' => property::White_Space(c),
-            _ => false,
-        }
-    }
-
-    /// Returns true if this `char` is alphanumeric, and false otherwise.
-    ///
-    /// 'Alphanumeric'-ness is defined in terms of the Unicode General Categories
-    /// 'Nd', 'Nl', 'No' and the Derived Core Property 'Alphabetic'.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!('٣'.is_alphanumeric());
-    /// assert!('7'.is_alphanumeric());
-    /// assert!('৬'.is_alphanumeric());
-    /// assert!('K'.is_alphanumeric());
-    /// assert!('و'.is_alphanumeric());
-    /// assert!('藏'.is_alphanumeric());
-    /// assert!(!'¾'.is_alphanumeric());
-    /// assert!(!'①'.is_alphanumeric());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_alphanumeric(self) -> bool {
-        self.is_alphabetic() || self.is_numeric()
-    }
-
-    /// Returns true if this `char` is a control code point, and false otherwise.
-    ///
-    /// 'Control code point' is defined in terms of the Unicode General
-    /// Category `Cc`.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// // U+009C, STRING TERMINATOR
-    /// assert!('œ'.is_control());
-    /// assert!(!'q'.is_control());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_control(self) -> bool {
-        general_category::Cc(self)
-    }
-
-    /// Returns true if this `char` is numeric, and false otherwise.
-    ///
-    /// 'Numeric'-ness is defined in terms of the Unicode General Categories
-    /// 'Nd', 'Nl', 'No'.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```
-    /// assert!('٣'.is_numeric());
-    /// assert!('7'.is_numeric());
-    /// assert!('৬'.is_numeric());
-    /// assert!(!'K'.is_numeric());
-    /// assert!(!'و'.is_numeric());
-    /// assert!(!'藏'.is_numeric());
-    /// assert!(!'¾'.is_numeric());
-    /// assert!(!'①'.is_numeric());
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn is_numeric(self) -> bool {
-        match self {
-            '0'...'9' => true,
-            c if c > '\x7f' => general_category::N(c),
-            _ => false,
-        }
-    }
-
-    /// Returns an iterator that yields the lowercase equivalent of a `char`
-    /// as one or more `char`s.
-    ///
-    /// If a character does not have a lowercase equivalent, the same character
-    /// will be returned back by the iterator.
-    ///
-    /// This performs complex unconditional mappings with no tailoring: it maps
-    /// one Unicode character to its lowercase equivalent according to the
-    /// [Unicode database] and the additional complex mappings
-    /// [`SpecialCasing.txt`]. Conditional mappings (based on context or
-    /// language) are not considered here.
-    ///
-    /// For a full reference, see [here][reference].
-    ///
-    /// [Unicode database]: ftp://ftp.unicode.org/Public/UNIDATA/UnicodeData.txt
-    ///
-    /// [`SpecialCasing.txt`]: ftp://ftp.unicode.org/Public/UNIDATA/SpecialCasing.txt
-    ///
-    /// [reference]: http://www.unicode.org/versions/Unicode7.0.0/ch03.pdf#G33992
-    ///
-    /// # Examples
-    ///
-    /// As an iterator:
-    ///
-    /// ```
-    /// for c in 'İ'.to_lowercase() {
-    ///     print!("{}", c);
-    /// }
-    /// println!();
-    /// ```
-    ///
-    /// Using `println!` directly:
-    ///
-    /// ```
-    /// println!("{}", 'İ'.to_lowercase());
-    /// ```
-    ///
-    /// Both are equivalent to:
-    ///
-    /// ```
-    /// println!("i\u{307}");
-    /// ```
-    ///
-    /// Using `to_string`:
-    ///
-    /// ```
-    /// assert_eq!('C'.to_lowercase().to_string(), "c");
-    ///
-    /// // Sometimes the result is more than one character:
-    /// assert_eq!('İ'.to_lowercase().to_string(), "i\u{307}");
-    ///
-    /// // Characters that do not have both uppercase and lowercase
-    /// // convert into themselves.
-    /// assert_eq!('山'.to_lowercase().to_string(), "山");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn to_lowercase(self) -> ToLowercase {
-        ToLowercase(CaseMappingIter::new(conversions::to_lower(self)))
-    }
-
-    /// Returns an iterator that yields the uppercase equivalent of a `char`
-    /// as one or more `char`s.
-    ///
-    /// If a character does not have an uppercase equivalent, the same character
-    /// will be returned back by the iterator.
-    ///
-    /// This performs complex unconditional mappings with no tailoring: it maps
-    /// one Unicode character to its uppercase equivalent according to the
-    /// [Unicode database] and the additional complex mappings
-    /// [`SpecialCasing.txt`]. Conditional mappings (based on context or
-    /// language) are not considered here.
-    ///
-    /// For a full reference, see [here][reference].
-    ///
-    /// [Unicode database]: ftp://ftp.unicode.org/Public/UNIDATA/UnicodeData.txt
-    ///
-    /// [`SpecialCasing.txt`]: ftp://ftp.unicode.org/Public/UNIDATA/SpecialCasing.txt
-    ///
-    /// [reference]: http://www.unicode.org/versions/Unicode7.0.0/ch03.pdf#G33992
-    ///
-    /// # Examples
-    ///
-    /// As an iterator:
-    ///
-    /// ```
-    /// for c in 'ß'.to_uppercase() {
-    ///     print!("{}", c);
-    /// }
-    /// println!();
-    /// ```
-    ///
-    /// Using `println!` directly:
-    ///
-    /// ```
-    /// println!("{}", 'ß'.to_uppercase());
-    /// ```
-    ///
-    /// Both are equivalent to:
-    ///
-    /// ```
-    /// println!("SS");
-    /// ```
-    ///
-    /// Using `to_string`:
-    ///
-    /// ```
-    /// assert_eq!('c'.to_uppercase().to_string(), "C");
-    ///
-    /// // Sometimes the result is more than one character:
-    /// assert_eq!('ß'.to_uppercase().to_string(), "SS");
-    ///
-    /// // Characters that do not have both uppercase and lowercase
-    /// // convert into themselves.
-    /// assert_eq!('山'.to_uppercase().to_string(), "山");
-    /// ```
-    ///
-    /// # Note on locale
-    ///
-    /// In Turkish, the equivalent of 'i' in Latin has five forms instead of two:
-    ///
-    /// * 'Dotless': I / ı, sometimes written ï
-    /// * 'Dotted': İ / i
-    ///
-    /// Note that the lowercase dotted 'i' is the same as the Latin. Therefore:
-    ///
-    /// ```
-    /// let upper_i = 'i'.to_uppercase().to_string();
-    /// ```
-    ///
-    /// The value of `upper_i` here relies on the language of the text: if we're
-    /// in `en-US`, it should be `"I"`, but if we're in `tr_TR`, it should
-    /// be `"İ"`. `to_uppercase()` does not take this into account, and so:
-    ///
-    /// ```
-    /// let upper_i = 'i'.to_uppercase().to_string();
-    ///
-    /// assert_eq!(upper_i, "I");
-    /// ```
-    ///
-    /// holds across languages.
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[inline]
-    pub fn to_uppercase(self) -> ToUppercase {
-        ToUppercase(CaseMappingIter::new(conversions::to_upper(self)))
-    }
-
-    /// Checks if the value is within the ASCII range.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let ascii = 'a';
-    /// let non_ascii = '❤';
-    ///
-    /// assert!(ascii.is_ascii());
-    /// assert!(!non_ascii.is_ascii());
-    /// ```
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn is_ascii(&self) -> bool {
-        *self as u32 <= 0x7F
-    }
-
-    /// Makes a copy of the value in its ASCII upper case equivalent.
-    ///
-    /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
-    /// but non-ASCII letters are unchanged.
-    ///
-    /// To uppercase the value in-place, use [`make_ascii_uppercase`].
-    ///
-    /// To uppercase ASCII characters in addition to non-ASCII characters, use
-    /// [`to_uppercase`].
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let ascii = 'a';
-    /// let non_ascii = '❤';
-    ///
-    /// assert_eq!('A', ascii.to_ascii_uppercase());
-    /// assert_eq!('❤', non_ascii.to_ascii_uppercase());
-    /// ```
-    ///
-    /// [`make_ascii_uppercase`]: #method.make_ascii_uppercase
-    /// [`to_uppercase`]: #method.to_uppercase
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn to_ascii_uppercase(&self) -> char {
-        if self.is_ascii() {
-            (*self as u8).to_ascii_uppercase() as char
-        } else {
-            *self
-        }
-    }
-
-    /// Makes a copy of the value in its ASCII lower case equivalent.
-    ///
-    /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
-    /// but non-ASCII letters are unchanged.
-    ///
-    /// To lowercase the value in-place, use [`make_ascii_lowercase`].
-    ///
-    /// To lowercase ASCII characters in addition to non-ASCII characters, use
-    /// [`to_lowercase`].
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let ascii = 'A';
-    /// let non_ascii = '❤';
-    ///
-    /// assert_eq!('a', ascii.to_ascii_lowercase());
-    /// assert_eq!('❤', non_ascii.to_ascii_lowercase());
-    /// ```
-    ///
-    /// [`make_ascii_lowercase`]: #method.make_ascii_lowercase
-    /// [`to_lowercase`]: #method.to_lowercase
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn to_ascii_lowercase(&self) -> char {
-        if self.is_ascii() {
-            (*self as u8).to_ascii_lowercase() as char
-        } else {
-            *self
-        }
-    }
-
-    /// Checks that two values are an ASCII case-insensitive match.
-    ///
-    /// Equivalent to `to_ascii_lowercase(a) == to_ascii_lowercase(b)`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let upper_a = 'A';
-    /// let lower_a = 'a';
-    /// let lower_z = 'z';
-    ///
-    /// assert!(upper_a.eq_ignore_ascii_case(&lower_a));
-    /// assert!(upper_a.eq_ignore_ascii_case(&upper_a));
-    /// assert!(!upper_a.eq_ignore_ascii_case(&lower_z));
-    /// ```
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn eq_ignore_ascii_case(&self, other: &char) -> bool {
-        self.to_ascii_lowercase() == other.to_ascii_lowercase()
-    }
-
-    /// Converts this type 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.
-    ///
-    /// To return a new uppercased value without modifying the existing one, use
-    /// [`to_ascii_uppercase`].
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let mut ascii = 'a';
-    ///
-    /// ascii.make_ascii_uppercase();
-    ///
-    /// assert_eq!('A', ascii);
-    /// ```
-    ///
-    /// [`to_ascii_uppercase`]: #method.to_ascii_uppercase
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn make_ascii_uppercase(&mut self) {
-        *self = self.to_ascii_uppercase();
-    }
-
-    /// Converts this type 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.
-    ///
-    /// To return a new lowercased value without modifying the existing one, use
-    /// [`to_ascii_lowercase`].
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// let mut ascii = 'A';
-    ///
-    /// ascii.make_ascii_lowercase();
-    ///
-    /// assert_eq!('a', ascii);
-    /// ```
-    ///
-    /// [`to_ascii_lowercase`]: #method.to_ascii_lowercase
-    #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
-    #[inline]
-    pub fn make_ascii_lowercase(&mut self) {
-        *self = self.to_ascii_lowercase();
-    }
-
-    /// Checks if the value is an ASCII alphabetic character:
-    ///
-    /// - U+0041 'A' ... U+005A 'Z', or
-    /// - U+0061 'a' ... U+007A 'z'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(uppercase_a.is_ascii_alphabetic());
-    /// assert!(uppercase_g.is_ascii_alphabetic());
-    /// assert!(a.is_ascii_alphabetic());
-    /// assert!(g.is_ascii_alphabetic());
-    /// assert!(!zero.is_ascii_alphabetic());
-    /// assert!(!percent.is_ascii_alphabetic());
-    /// assert!(!space.is_ascii_alphabetic());
-    /// assert!(!lf.is_ascii_alphabetic());
-    /// assert!(!esc.is_ascii_alphabetic());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_alphabetic(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_alphabetic()
-    }
-
-    /// Checks if the value is an ASCII uppercase character:
-    /// U+0041 'A' ... U+005A 'Z'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(uppercase_a.is_ascii_uppercase());
-    /// assert!(uppercase_g.is_ascii_uppercase());
-    /// assert!(!a.is_ascii_uppercase());
-    /// assert!(!g.is_ascii_uppercase());
-    /// assert!(!zero.is_ascii_uppercase());
-    /// assert!(!percent.is_ascii_uppercase());
-    /// assert!(!space.is_ascii_uppercase());
-    /// assert!(!lf.is_ascii_uppercase());
-    /// assert!(!esc.is_ascii_uppercase());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_uppercase(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_uppercase()
-    }
-
-    /// Checks if the value is an ASCII lowercase character:
-    /// U+0061 'a' ... U+007A 'z'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(!uppercase_a.is_ascii_lowercase());
-    /// assert!(!uppercase_g.is_ascii_lowercase());
-    /// assert!(a.is_ascii_lowercase());
-    /// assert!(g.is_ascii_lowercase());
-    /// assert!(!zero.is_ascii_lowercase());
-    /// assert!(!percent.is_ascii_lowercase());
-    /// assert!(!space.is_ascii_lowercase());
-    /// assert!(!lf.is_ascii_lowercase());
-    /// assert!(!esc.is_ascii_lowercase());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_lowercase(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_lowercase()
-    }
-
-    /// Checks if the value is an ASCII alphanumeric character:
-    ///
-    /// - U+0041 'A' ... U+005A 'Z', or
-    /// - U+0061 'a' ... U+007A 'z', or
-    /// - U+0030 '0' ... U+0039 '9'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(uppercase_a.is_ascii_alphanumeric());
-    /// assert!(uppercase_g.is_ascii_alphanumeric());
-    /// assert!(a.is_ascii_alphanumeric());
-    /// assert!(g.is_ascii_alphanumeric());
-    /// assert!(zero.is_ascii_alphanumeric());
-    /// assert!(!percent.is_ascii_alphanumeric());
-    /// assert!(!space.is_ascii_alphanumeric());
-    /// assert!(!lf.is_ascii_alphanumeric());
-    /// assert!(!esc.is_ascii_alphanumeric());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_alphanumeric(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_alphanumeric()
-    }
-
-    /// Checks if the value is an ASCII decimal digit:
-    /// U+0030 '0' ... U+0039 '9'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(!uppercase_a.is_ascii_digit());
-    /// assert!(!uppercase_g.is_ascii_digit());
-    /// assert!(!a.is_ascii_digit());
-    /// assert!(!g.is_ascii_digit());
-    /// assert!(zero.is_ascii_digit());
-    /// assert!(!percent.is_ascii_digit());
-    /// assert!(!space.is_ascii_digit());
-    /// assert!(!lf.is_ascii_digit());
-    /// assert!(!esc.is_ascii_digit());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_digit(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_digit()
-    }
-
-    /// Checks if the value is an ASCII hexadecimal digit:
-    ///
-    /// - U+0030 '0' ... U+0039 '9', or
-    /// - U+0041 'A' ... U+0046 'F', or
-    /// - U+0061 'a' ... U+0066 'f'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(uppercase_a.is_ascii_hexdigit());
-    /// assert!(!uppercase_g.is_ascii_hexdigit());
-    /// assert!(a.is_ascii_hexdigit());
-    /// assert!(!g.is_ascii_hexdigit());
-    /// assert!(zero.is_ascii_hexdigit());
-    /// assert!(!percent.is_ascii_hexdigit());
-    /// assert!(!space.is_ascii_hexdigit());
-    /// assert!(!lf.is_ascii_hexdigit());
-    /// assert!(!esc.is_ascii_hexdigit());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_hexdigit(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_hexdigit()
-    }
-
-    /// Checks if the value is an ASCII punctuation character:
-    ///
-    /// - U+0021 ... U+002F `! " # $ % & ' ( ) * + , - . /`, or
-    /// - U+003A ... U+0040 `: ; < = > ? @`, or
-    /// - U+005B ... U+0060 ``[ \ ] ^ _ ` ``, or
-    /// - U+007B ... U+007E `{ | } ~`
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(!uppercase_a.is_ascii_punctuation());
-    /// assert!(!uppercase_g.is_ascii_punctuation());
-    /// assert!(!a.is_ascii_punctuation());
-    /// assert!(!g.is_ascii_punctuation());
-    /// assert!(!zero.is_ascii_punctuation());
-    /// assert!(percent.is_ascii_punctuation());
-    /// assert!(!space.is_ascii_punctuation());
-    /// assert!(!lf.is_ascii_punctuation());
-    /// assert!(!esc.is_ascii_punctuation());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_punctuation(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_punctuation()
-    }
-
-    /// Checks if the value is an ASCII graphic character:
-    /// U+0021 '!' ... U+007E '~'.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(uppercase_a.is_ascii_graphic());
-    /// assert!(uppercase_g.is_ascii_graphic());
-    /// assert!(a.is_ascii_graphic());
-    /// assert!(g.is_ascii_graphic());
-    /// assert!(zero.is_ascii_graphic());
-    /// assert!(percent.is_ascii_graphic());
-    /// assert!(!space.is_ascii_graphic());
-    /// assert!(!lf.is_ascii_graphic());
-    /// assert!(!esc.is_ascii_graphic());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_graphic(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_graphic()
-    }
-
-    /// Checks if the value is an ASCII whitespace character:
-    /// U+0020 SPACE, U+0009 HORIZONTAL TAB, U+000A LINE FEED,
-    /// U+000C FORM FEED, or U+000D CARRIAGE RETURN.
-    ///
-    /// Rust uses the WhatWG Infra Standard's [definition of ASCII
-    /// whitespace][infra-aw]. There are several other definitions in
-    /// wide use. For instance, [the POSIX locale][pct] includes
-    /// U+000B VERTICAL TAB as well as all the above characters,
-    /// but—from the very same specification—[the default rule for
-    /// "field splitting" in the Bourne shell][bfs] considers *only*
-    /// SPACE, HORIZONTAL TAB, and LINE FEED as whitespace.
-    ///
-    /// If you are writing a program that will process an existing
-    /// file format, check what that format's definition of whitespace is
-    /// before using this function.
-    ///
-    /// [infra-aw]: https://infra.spec.whatwg.org/#ascii-whitespace
-    /// [pct]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_01
-    /// [bfs]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_05
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(!uppercase_a.is_ascii_whitespace());
-    /// assert!(!uppercase_g.is_ascii_whitespace());
-    /// assert!(!a.is_ascii_whitespace());
-    /// assert!(!g.is_ascii_whitespace());
-    /// assert!(!zero.is_ascii_whitespace());
-    /// assert!(!percent.is_ascii_whitespace());
-    /// assert!(space.is_ascii_whitespace());
-    /// assert!(lf.is_ascii_whitespace());
-    /// assert!(!esc.is_ascii_whitespace());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_whitespace(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_whitespace()
-    }
-
-    /// Checks if the value is an ASCII control character:
-    /// U+0000 NUL ... U+001F UNIT SEPARATOR, or U+007F DELETE.
-    /// Note that most ASCII whitespace characters are control
-    /// characters, but SPACE is not.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ascii_ctype)]
-    ///
-    /// let uppercase_a = 'A';
-    /// let uppercase_g = 'G';
-    /// let a = 'a';
-    /// let g = 'g';
-    /// let zero = '0';
-    /// let percent = '%';
-    /// let space = ' ';
-    /// let lf = '\n';
-    /// let esc: char = 0x1b_u8.into();
-    ///
-    /// assert!(!uppercase_a.is_ascii_control());
-    /// assert!(!uppercase_g.is_ascii_control());
-    /// assert!(!a.is_ascii_control());
-    /// assert!(!g.is_ascii_control());
-    /// assert!(!zero.is_ascii_control());
-    /// assert!(!percent.is_ascii_control());
-    /// assert!(!space.is_ascii_control());
-    /// assert!(lf.is_ascii_control());
-    /// assert!(esc.is_ascii_control());
-    /// ```
-    #[stable(feature = "ascii_ctype_on_intrinsics", since = "1.24.0")]
-    #[inline]
-    pub fn is_ascii_control(&self) -> bool {
-        self.is_ascii() && (*self as u8).is_ascii_control()
-    }
-}
diff --git a/src/libcore/unicode/mod.rs b/src/libcore/unicode/mod.rs
index 0ea1aa12146..060c55286fe 100644
--- a/src/libcore/unicode/mod.rs
+++ b/src/libcore/unicode/mod.rs
@@ -16,7 +16,6 @@ pub(crate) mod tables;
 pub(crate) mod version;
 
 pub mod str;
-pub(crate) mod char;
 
 // For use in liballoc, not re-exported in libstd.
 pub mod derived_property {