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Flatten ORs and ANDs in marker construction (#4260)

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## Summary

If we're ORing an OR, we should just append rather than nesting in
another OR.

In my branch, this let us simplify:

```
python_version < '3.10' or python_version > '3.12' or (python_version < '3.8' or python_version > '3.12')
```

To:

```
python_version < '3.10' or python_version > '3.12
```
This commit is contained in:
Charlie Marsh 2024-06-11 18:44:49 -07:00 • committed by GitHub
parent 44041bccd2
commit 22795f85bc
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1 changed files with 10 additions and 2 deletions
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12
crates/pep508-rs/src/marker.rs
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@ -1860,7 +1860,11 @@ impl MarkerTree {
_ => {}
}
if let MarkerTree::And(ref mut exprs) = *self {
exprs.push(tree);
if let MarkerTree::And(tree) = tree {
exprs.extend(tree);
} else {
exprs.push(tree);
}
}
}
@ -1878,7 +1882,11 @@ impl MarkerTree {
_ => {}
}
if let MarkerTree::Or(ref mut exprs) = *self {
exprs.push(tree);
if let MarkerTree::Or(tree) = tree {
exprs.extend(tree);
} else {
exprs.push(tree);
}
}
}
}