implement simplified precedence handling

[exaexa]

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[exaexa]

References #2 .

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@100f851). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #3   +/-   ##
=========================================
  Coverage          ?   97.80%           
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  Files             ?        6           
  Lines             ?      319           
  Branches          ?        0           
=========================================
  Hits              ?      312           
  Misses            ?        7           
  Partials          ?        0           

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