Scala 2.13.9 軟體資訊交流 Mac

What's new in this version:

Compatibility with Scala 3:
- Tasty Reader: Add support for Scala 3.2
- Tasty Reader: Restrict access to experimental definitions
- To aid cross-building, accept and ignore using in method calls
- To aid cross-building, allow ? as a wildcard even without -Xsource:3
- Make Scala-3-style implicit resolution explicitly opt-in rather than bundled in -Xsource:3
- Prefer type of overridden member when inferring (under -Xsource:3)

JDK version support:
- Make -release more useful, deprecate -target, align with Scala 3
- Support JDK 19

Warnings and lints:
- Add -Wnonunit-statement to warn about discarded values in statement positionby
- Make unused-import warnings easier to silence (support filtering by origin=)
- Add -Wperformance lints for *Ref boxing and nonlocal returnby

Language improvements:
- Improve support for Unicode supplementary characters in identifiers and string interpolationby

Compiler options:
- Use subcolon args to simplify optimizer optionsby
- For troubleshooting compiler, add -Vdebug-type-error (and remove -Yissue-debug)

Security:
- Error on source files with Unicode directional formatting characters)
- Prevent Function0 execution during LazyList deserialization

Fixed:
- Emit all bridge methods non-final (perhaps affecting serialization compat)
- Fix null-pointer regression in Vector#prependedAll and Vector#appendedAll
- Improve concurrent behavior of Java ConcurrentMap wrapper
- Preserve null policy in wrapped Java Maps