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Move jointness censoring to proc_macro #76285

Merged
merged 2 commits into from
Sep 5, 2020
Merged

Move jointness censoring to proc_macro #76285

merged 2 commits into from
Sep 5, 2020

Commits on Sep 3, 2020

  1. Move jointness censoring to proc_macro 

    Proc-macro API currently exposes jointness in `Punct` tokens. That is,
`+` in `+one` is **non** joint.

Our lexer produces jointness info for all tokens, so we need to censor
it *somewhere*

Previously we did this in a lexer, but it makes more sense to do this
in a proc-macro server.
    @matklad
    matklad committed Sep 3, 2020
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  2. Optimize Cursor::look_ahead 

    Cloning a tt is cheap, but not free (there's Arc inside).
    @matklad
    matklad committed Sep 3, 2020
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