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Add proc_macro::Span::{before, after}.

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This commit is contained in:
Mara Bos
2021-06-09 14:37:10 +02:00
parent cc9610bf5a
commit d5aec64c12
3 changed files with 20 additions and 0 deletions
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6
compiler/rustc_expand/src/proc_macro_server.rs
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@@ -738,6 +738,12 @@ impl server::Span for Rustc<'_> {
let loc = self.sess.source_map().lookup_char_pos(span.hi());
LineColumn { line: loc.line, column: loc.col.to_usize() }
}
fn before(&mut self, span: Self::Span) -> Self::Span {
span.shrink_to_lo()
}
fn after(&mut self, span: Self::Span) -> Self::Span {
span.shrink_to_hi()
}
fn join(&mut self, first: Self::Span, second: Self::Span) -> Option<Self::Span> {
let self_loc = self.sess.source_map().lookup_char_pos(first.lo());
let other_loc = self.sess.source_map().lookup_char_pos(second.lo());