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Rollup merge of #80784 - petrochenkov:nontspan, r=Aaron1011

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rustc_parse: Better spans for synthesized token streams

I think using the nonterminal span for synthesizing its tokens is a better approximation than using `DUMMY_SP` or the attribute span like #79472 did in `expand.rs`.

r? `@Aaron1011`
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Yuki Okushi 2021-01-08 02:06:20 +09:00 • committed by GitHub
commit 695f878332
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9 changed files with 151 additions and 167 deletions
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compiler/rustc_ast/src/token.rs
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@ -771,7 +771,7 @@ impl fmt::Display for NonterminalKind {
}
impl Nonterminal {
fn span(&self) -> Span {
pub fn span(&self) -> Span {
match self {
NtItem(item) => item.span,
NtBlock(block) => block.span,