#[macro_export(local_inner_macros)]
macro_rules! custom_keyword {
($ident:ident) => {
#[allow(non_camel_case_types)]
pub struct $ident {
pub span: $crate::export::Span,
}
#[doc(hidden)]
#[allow(non_snake_case)]
pub fn $ident<__S: $crate::export::IntoSpans<[$crate::export::Span; 1]>>(
span: __S,
) -> $ident {
$ident {
span: $crate::export::IntoSpans::into_spans(span)[0],
}
}
impl $crate::export::Default for $ident {
fn default() -> Self {
$ident {
span: $crate::export::Span::call_site(),
}
}
}
impl_parse_for_custom_keyword!($ident);
impl_to_tokens_for_custom_keyword!($ident);
impl_clone_for_custom_keyword!($ident);
impl_extra_traits_for_custom_keyword!($ident);
};
}
#[cfg(feature = "parsing")]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_parse_for_custom_keyword {
($ident:ident) => {
impl $crate::token::CustomToken for $ident {
fn peek(cursor: $crate::buffer::Cursor) -> $crate::export::bool {
if let Some((ident, _rest)) = cursor.ident() {
ident == stringify!($ident)
} else {
false
}
}
fn display() -> &'static $crate::export::str {
concat!("`", stringify!($ident), "`")
}
}
impl $crate::parse::Parse for $ident {
fn parse(input: $crate::parse::ParseStream) -> $crate::parse::Result<$ident> {
input.step(|cursor| {
if let $crate::export::Some((ident, rest)) = cursor.ident() {
if ident == stringify!($ident) {
return $crate::export::Ok(($ident { span: ident.span() }, rest));
}
}
$crate::export::Err(cursor.error(concat!(
"expected `",
stringify!($ident),
"`"
)))
})
}
}
};
}
#[cfg(not(feature = "parsing"))]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_parse_for_custom_keyword {
($ident:ident) => {};
}
#[cfg(feature = "printing")]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_to_tokens_for_custom_keyword {
($ident:ident) => {
impl $crate::export::ToTokens for $ident {
fn to_tokens(&self, tokens: &mut $crate::export::TokenStream2) {
let ident = $crate::Ident::new(stringify!($ident), self.span);
$crate::export::TokenStreamExt::append(tokens, ident);
}
}
};
}
#[cfg(not(feature = "printing"))]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_to_tokens_for_custom_keyword {
($ident:ident) => {};
}
#[cfg(feature = "clone-impls")]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_clone_for_custom_keyword {
($ident:ident) => {
impl $crate::export::Copy for $ident {}
impl $crate::export::Clone for $ident {
fn clone(&self) -> Self {
*self
}
}
};
}
#[cfg(not(feature = "clone-impls"))]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_clone_for_custom_keyword {
($ident:ident) => {};
}
#[cfg(feature = "extra-traits")]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_extra_traits_for_custom_keyword {
($ident:ident) => {
impl $crate::export::Debug for $ident {
fn fmt(&self, f: &mut $crate::export::Formatter) -> $crate::export::fmt::Result {
$crate::export::Formatter::write_str(
f,
concat!("Keyword [", stringify!($ident), "]"),
)
}
}
impl $crate::export::Eq for $ident {}
impl $crate::export::PartialEq for $ident {
fn eq(&self, _other: &Self) -> $crate::export::bool {
true
}
}
impl $crate::export::Hash for $ident {
fn hash<__H: $crate::export::Hasher>(&self, _state: &mut __H) {}
}
};
}
#[cfg(not(feature = "extra-traits"))]
#[doc(hidden)]
#[macro_export]
macro_rules! impl_extra_traits_for_custom_keyword {
($ident:ident) => {};
}