68 lines
1.2 KiB
Rust
68 lines
1.2 KiB
Rust
use proc_macro2::Span;
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pub trait IntoSpans<S> {
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fn into_spans(self) -> S;
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}
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impl IntoSpans<[Span; 1]> for Span {
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fn into_spans(self) -> [Span; 1] {
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[self]
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}
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}
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impl IntoSpans<[Span; 2]> for Span {
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fn into_spans(self) -> [Span; 2] {
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[self, self]
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}
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}
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impl IntoSpans<[Span; 3]> for Span {
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fn into_spans(self) -> [Span; 3] {
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[self, self, self]
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}
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}
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impl IntoSpans<[Span; 1]> for [Span; 1] {
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fn into_spans(self) -> [Span; 1] {
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self
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}
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}
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impl IntoSpans<[Span; 2]> for [Span; 2] {
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fn into_spans(self) -> [Span; 2] {
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self
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}
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}
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impl IntoSpans<[Span; 3]> for [Span; 3] {
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fn into_spans(self) -> [Span; 3] {
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self
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}
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}
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#[cfg(feature = "parsing")]
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pub trait FromSpans: Sized {
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fn from_spans(spans: &[Span]) -> Self;
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}
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#[cfg(feature = "parsing")]
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impl FromSpans for [Span; 1] {
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fn from_spans(spans: &[Span]) -> Self {
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[spans[0]]
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}
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}
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#[cfg(feature = "parsing")]
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impl FromSpans for [Span; 2] {
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fn from_spans(spans: &[Span]) -> Self {
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[spans[0], spans[1]]
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}
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}
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#[cfg(feature = "parsing")]
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impl FromSpans for [Span; 3] {
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fn from_spans(spans: &[Span]) -> Self {
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[spans[0], spans[1], spans[2]]
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}
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}
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