#![cfg(feature = "parsing")]
use nom::IResult;
macro_rules! punct {
($i:expr, $punct:expr) => {
$crate::helper::punct($i, $punct)
};
}
pub fn punct<'a>(input: &'a str, token: &'static str) -> IResult<&'a str, &'a str> {
for (i, ch) in input.char_indices() {
if !ch.is_whitespace() {
return if input[i..].starts_with(token) {
let end = i + token.len();
IResult::Done(&input[end..], &input[i..end])
} else {
IResult::Error
};
}
}
IResult::Error
}
macro_rules! option {
($i:expr, $submac:ident!( $($args:tt)* )) => {
match $submac!($i, $($args)*) {
$crate::nom::IResult::Done(i, o) => $crate::nom::IResult::Done(i, Some(o)),
$crate::nom::IResult::Error => $crate::nom::IResult::Done($i, None),
}
};
($i:expr, $f:expr) => {
option!($i, call!($f));
};
}
macro_rules! opt_vec {
($i:expr, $submac:ident!( $($args:tt)* )) => {
match $submac!($i, $($args)*) {
$crate::nom::IResult::Done(i, o) => $crate::nom::IResult::Done(i, o),
$crate::nom::IResult::Error => $crate::nom::IResult::Done($i, Vec::new()),
}
};
}
macro_rules! epsilon {
($i:expr,) => {
$crate::nom::IResult::Done($i, ())
};
}
macro_rules! tap {
($i:expr, $name:ident : $submac:ident!( $($args:tt)* ) => $e:expr) => {
match $submac!($i, $($args)*) {
$crate::nom::IResult::Done(i, o) => {
let $name = o;
$e;
$crate::nom::IResult::Done(i, ())
}
$crate::nom::IResult::Error => $crate::nom::IResult::Error,
}
};
($i:expr, $name:ident : $f:expr => $e:expr) => {
tap!($i, $name: call!($f) => $e);
};
}