Notable Changes

Language

• Implement @main functions #6898
• Allow infix operators at start of line #7031
• Drop do while #6994
• Alternative Syntax for Control Expressions #7024
• Allow significant indentation syntax #7083
• Change indentation rules to allow copy-paste #7114
• Switch to the 2.13 standard library #7019
• Allow collective parameters for extension methods #6985
• Implement generic number literals #6919

Metaprogramming

• Add toExprOfTuple in scala.quoted #7037
• Make toExprOfTuple produce tuples with precise types #7076
• Add quoted.Liftable[TupleN] with N > 22 to the stdlib #6947
• Add quoted.Liftable[BigInt] and quoted.Liftable[BigDecimal] to the stdlib #6944
• Add quoted ExprOps toExprOfSeq #6935
• Re-contextualize Liftable.toExpr #6924
• toExprOfTuple method with precise types #7047
• Factor out staging from the core of scala.quoted #7077
• Add scala.quoted.Liftables to the stdlib #6928
• Remove scala.quoted.QuoteError #6925
• Create dotty-staging library #7080

Type class derivation

• Add documentation for type class derivation #7063
• Removed redundant Shape type #6964
• Support implicit scope augmentation for Mirror #6879

Other

• [DOC] Add ScalaDays 2019 talks #6984
• Release sbt-dotty 0.3.4, future-proof isDotty #7120
• In Scala.js mode, compile all lazy vals as thread-unsafe. #7026

Contributors

Thank you to all the contributors who made this release possible 🎉

According to git shortlog -sn --no-merges 0.17.0-RC1..0.18.1-RC1 these are:

   106  Nicolas Stucki
    84  Martin Odersky
    68  Guillaume Martres
    26  Liu Fengyun
    24  Jamie Thompson
    23  Miles Sabin
    16  Anatolii
     8  Sébastien Doeraene
     7  bishabosha
     4  Aggelos Biboudis
     4  Michał Gutowski
     2  odersky
     2  Nikolay
     1  Master-Killer
     1  Ashwin Bhaskar
     1  Carlos Quiroz
     1  =
     1  Olivier Blanvillain
     1  SrTobi

Reporting Bugs

If you encounter a bug, please open an issue! 🙏