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use proc_macro2::extra::DelimSpan;
use proc_macro2::{Delimiter, Group, Span, TokenStream};
#[doc(hidden)]
pub trait IntoSpans<S> {
fn into_spans(self) -> S;
}
impl IntoSpans<Span> for Span {
fn into_spans(self) -> Span {
self
}
}
impl IntoSpans<[Span; 1]> for Span {
fn into_spans(self) -> [Span; 1] {
[self]
}
}
impl IntoSpans<[Span; 2]> for Span {
fn into_spans(self) -> [Span; 2] {
[self, self]
}
}
impl IntoSpans<[Span; 3]> for Span {
fn into_spans(self) -> [Span; 3] {
[self, self, self]
}
}
impl IntoSpans<[Span; 1]> for [Span; 1] {
fn into_spans(self) -> [Span; 1] {
self
}
}
impl IntoSpans<[Span; 2]> for [Span; 2] {
fn into_spans(self) -> [Span; 2] {
self
}
}
impl IntoSpans<[Span; 3]> for [Span; 3] {
fn into_spans(self) -> [Span; 3] {
self
}
}
impl IntoSpans<DelimSpan> for Span {
fn into_spans(self) -> DelimSpan {
let mut group = Group::new(Delimiter::None, TokenStream::new());
group.set_span(self);
group.delim_span()
}
}
impl IntoSpans<DelimSpan> for DelimSpan {
fn into_spans(self) -> DelimSpan {
self
}
}