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Change to add 1 if non zero shift

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This commit is contained in:
Edwin Cheng 2019-11-05 01:16:06 +08:00
parent 188a1412b9
commit a5839662f4
1 changed files with 1 additions and 1 deletions
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2
crates/ra_mbe/src/lib.rs
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@ -108,7 +108,7 @@ impl MacroRules {
// Note that TokenId is started from zero,
// We have to add 1 to prevent duplication.
let shift = max_id(tt).unwrap_or(0) + 1;
let shift = max_id(tt).map_or(0, |it| it + 1);
Ok(MacroRules { rules, shift })
}