Function core::ascii::escape_default
1.0.0 · source · pub fn escape_default(c: u8) -> EscapeDefault ⓘ
Expand description
Returns an iterator that produces an escaped version of a u8
.
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. - Any other chars are given hex escapes of the form ‘\xNN’.
- Unicode escapes are never generated by this function.
§Examples
use std::ascii;
let escaped = ascii::escape_default(b'0').next().unwrap();
assert_eq!(b'0', escaped);
let mut escaped = ascii::escape_default(b'\t');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b't', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'\r');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'r', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'\n');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'n', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'\'');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'\'', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'"');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'"', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'\\');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'\\', escaped.next().unwrap());
let mut escaped = ascii::escape_default(b'\x9d');
assert_eq!(b'\\', escaped.next().unwrap());
assert_eq!(b'x', escaped.next().unwrap());
assert_eq!(b'9', escaped.next().unwrap());
assert_eq!(b'd', escaped.next().unwrap());
Run