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use internal::{IResult,Needed};
use traits::{AsChar,InputIter,InputLength,Slice};
use std::ops::RangeFrom;
#[macro_export]
macro_rules! one_of (
($i:expr, $inp: expr) => (
{
use $crate::Slice;
use $crate::AsChar;
use $crate::FindToken;
use $crate::InputIter;
match ($i).iter_elements().next().map(|c| {
(c, c.find_token($inp))
}) {
None => $crate::IResult::Incomplete::<_, _>($crate::Needed::Size(1)),
Some((_, false)) => $crate::IResult::Error(error_position!($crate::ErrorKind::OneOf, $i)),
Some((c, true)) => $crate::IResult::Done($i.slice(c.len()..), $i.iter_elements().next().unwrap().as_char())
}
}
);
);
#[macro_export]
macro_rules! none_of (
($i:expr, $inp: expr) => (
{
use $crate::Slice;
use $crate::AsChar;
use $crate::FindToken;
use $crate::InputIter;
match ($i).iter_elements().next().map(|c| {
(c, !c.find_token($inp))
}) {
None => $crate::IResult::Incomplete::<_, _>($crate::Needed::Size(1)),
Some((_, false)) => $crate::IResult::Error(error_position!($crate::ErrorKind::NoneOf, $i)),
Some((c, true)) => $crate::IResult::Done($i.slice(c.len()..), $i.iter_elements().next().unwrap().as_char())
}
}
);
);
#[macro_export]
macro_rules! char (
($i:expr, $c: expr) => (
{
use $crate::Slice;
use $crate::AsChar;
use $crate::InputIter;
match ($i).iter_elements().next().map(|c| {
(c, c.as_char() == $c)
}) {
None => $crate::IResult::Incomplete::<_, _>($crate::Needed::Size(1)),
Some((_, false)) => $crate::IResult::Error(error_position!($crate::ErrorKind::Char, $i)),
Some((c, true)) => $crate::IResult::Done($i.slice(c.len()..), $i.iter_elements().next().unwrap().as_char())
}
}
);
);
named!(#[doc="Matches a newline character '\\n'"], pub newline<char>, char!('\n'));
named!(#[doc="Matches a tab character '\\t'"], pub tab<char>, char!('\t'));
pub fn anychar<T>(input: T) -> IResult<T, char> where
T: InputIter+InputLength+Slice<RangeFrom<usize>>,
<T as InputIter>::Item: AsChar {
if input.input_len() == 0 {
IResult::Incomplete(Needed::Size(1))
} else {
IResult::Done(input.slice(1..), input.iter_elements().next().expect("slice should contain at least one element").as_char())
}
}
#[cfg(test)]
mod tests {
use internal::IResult::*;
use util::ErrorKind;
#[test]
fn one_of() {
named!(f<char>, one_of!("ab"));
let a = &b"abcd"[..];
assert_eq!(f(a), Done(&b"bcd"[..], 'a'));
let b = &b"cde"[..];
assert_eq!(f(b), Error(error_position!(ErrorKind::OneOf, b)));
named!(utf8(&str) -> char,
one_of!("+\u{FF0B}"));
assert!(utf8("+").is_done());
assert!(utf8("\u{FF0B}").is_done());
}
#[test]
fn none_of() {
named!(f<char>, none_of!("ab"));
let a = &b"abcd"[..];
assert_eq!(f(a), Error(error_position!(ErrorKind::NoneOf, a)));
let b = &b"cde"[..];
assert_eq!(f(b), Done(&b"de"[..], 'c'));
}
#[test]
fn char() {
named!(f<char>, char!('c'));
let a = &b"abcd"[..];
assert_eq!(f(a), Error(error_position!(ErrorKind::Char, a)));
let b = &b"cde"[..];
assert_eq!(f(b), Done(&b"de"[..], 'c'));
}
}