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authorbors[bot] <26634292+bors[bot]@users.noreply.github.com>2019-11-04 17:21:41 +0000
committerGitHub <[email protected]>2019-11-04 17:21:41 +0000
commitd9fb01f803671bfb6fca6b873bd140d8177ecb1c (patch)
tree9a1a0b696749d4d079ff0744272f78f497caae29 /editors/code/.gitignore
parentcc2d75d0f88bdcb1b3e20db36decb6ee6eca517a (diff)
parenta5839662f448602d6aa2d724432844fc2d08947e (diff)
Merge #2173
2173: MBE: Add TokenId shift in macro_rules r=matklad a=edwin0cheng As discussed in #2169 , for fixing duplication TokenId during expansion : > What we can do here is to re-number the tokens during expansion. Specifically: > * when we create macro_rules, we note the highest id of the token we have as shift> > * when we expand macro rules, if we need to output a token from definition, we just re-use its id > * if we need to output a token from the argument, we increase its id by shift (so it's guaranteed to not to collide with anything from the definition) > * finally, when we have a HirFileId of the expansion, we can look up the original value of shift and classify node to the arg/def by comparing it's id with shift. > This PR implement first 3 points of above solution. Co-authored-by: Edwin Cheng <[email protected]>
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