Add Semigroup and Monoid instances - Githubissues

purescript / purescript-st

The ST effect, for safe local mutation

BSD 3-Clause "New" or "Revised" License

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Add Semigroup and Monoid instances #51

Closed purefunctor closed 2 years ago

purefunctor commented 2 years ago

Description of the change

This adds Semigroup and Monoid instances for ST

Checklist:

[x] Added the change to the changelog's "Unreleased" section with a reference to this PR (e.g. "- Made a change (#0000)")
[ ] Linked any existing issues or proposals that this pull request should close
[ ] Updated or added relevant documentation
[ ] Added a test for the contribution (if applicable)