| 1 | |
| 2 |
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| 3 | use proc_macro2::extra::DelimSpan;
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| 4 | use proc_macro2::{Delimiter, Group, Span, TokenStream};
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| 5 |
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| 6 | #[doc(hidden)]
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| 7 | pub trait IntoSpans<S> {
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| 8 | fn into_spans(self) -> S;
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| 9 | }
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| 10 |
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| 11 | impl IntoSpans<Span> for Span {
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| 12 | fn into_spans(self) -> Span {
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| 13 | self
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| 14 | }
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| 15 | }
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| 16 |
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| 17 | impl IntoSpans<[Span; 1]> for Span {
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| 18 | fn into_spans(self) -> [Span; 1] {
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| 19 | [self]
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| 20 | }
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| 21 | }
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| 22 |
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| 23 | impl IntoSpans<[Span; 2]> for Span {
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| 24 | fn into_spans(self) -> [Span; 2] {
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| 25 | [self, self]
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| 26 | }
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| 27 | }
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| 28 |
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| 29 | impl IntoSpans<[Span; 3]> for Span {
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| 30 | fn into_spans(self) -> [Span; 3] {
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| 31 | [self, self, self]
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| 32 | }
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| 33 | }
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| 34 |
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| 35 | impl IntoSpans<[Span; 1]> for [Span; 1] {
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| 36 | fn into_spans(self) -> [Span; 1] {
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| 37 | self
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| 38 | }
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| 39 | }
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| 40 |
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| 41 | impl IntoSpans<[Span; 2]> for [Span; 2] {
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| 42 | fn into_spans(self) -> [Span; 2] {
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| 43 | self
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| 44 | }
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| 45 | }
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| 46 |
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| 47 | impl IntoSpans<[Span; 3]> for [Span; 3] {
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| 48 | fn into_spans(self) -> [Span; 3] {
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| 49 | self
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| 50 | }
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| 51 | }
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| 52 |
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| 53 | impl IntoSpans<DelimSpan> for Span {
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| 54 | fn into_spans(self) -> DelimSpan {
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| 55 | let mut group = Group::new(Delimiter::None, TokenStream::new());
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| 56 | group.set_span(self);
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| 57 | group.delim_span()
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | impl IntoSpans<DelimSpan> for DelimSpan {
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| 62 | fn into_spans(self) -> DelimSpan {
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| 63 | self
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| 64 | }
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| 65 | }
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