[5.7] Cherry-pick PrintAsPattern work#528

Merged

hamishknight merged 8 commits intoswiftlang:swift/release/5.7from

hamishknight:pattern-5.7

Jun 30, 2022

Commits on Jun 30, 2022

Wrap character classes around One

Azoy
authored and
hamishknight
committed
fix intersection, subtraction, symmetricDiference

Azoy
authored and
hamishknight
committed
Add test fixtures for renderAsBuilderDSL

natecook1000
authored and
hamishknight
committed
Fix an issue where we weren't properly escaping backslashes in quoted strings when converting to the DSL.

DaveEwing
authored and
hamishknight
committed
From review: use raw strings for find/replace when quoting a string.

DaveEwing
authored and
hamishknight
committed
From review: remove an extra `\` from the regex pattern. (The regex parser ignores it in front of a `"`, but it's confusing.)

DaveEwing
authored and
hamishknight
committed
Handle atoms as things to be wrapped

Azoy
authored and
hamishknight
committed
Unconditionally print a regex block for concatenations

Azoy
authored and
hamishknight
committed