Change cc syntax #17377
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Change cc syntax #17377
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- `^{xs}` in postfix
- `->{xs}` after arrow
- `any` instead of `*`
Use ^ and => shorthands instead.
And fine tune distinction of ^ as postfix or infix operator
Recognize as trailing in front of `->` or `?->`
... and fix a missing change when printing trees
Linyxus
approved these changes
May 7, 2023
| isOperator = !followingIsVararg() && !isPureArrow) | ||
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| /** RefinedType ::= WithType {[nl] Refinement} | ||
| /** RefinedType ::= WithType {[nl] (Refinement} [`^` CaptureSet] |
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tests/neg-custom-args/boxmap.scala
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| val x: (b: Box[A]) -> (f: A => B) ->{b, f} (() -> Box[B]) = lazymap[A, B] // works | ||
| val y: (b: Box[A]) -> (f: A => B) ->{cap} (() -> Box[B]) = lazymap[A, B] // works |
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Suggested change
| val x: (b: Box[A]) -> (f: A => B) ->{b, f} (() -> Box[B]) = lazymap[A, B] // works | |
| val y: (b: Box[A]) -> (f: A => B) ->{cap} (() -> Box[B]) = lazymap[A, B] // works | |
| val x: (b: Box[A]) -> (f: A => B) -> (() ->{b, f} Box[B]) = lazymap[A, B] // works | |
| val y: (b: Box[A]) -> (f: A => B) -> (() ->{cap} Box[B]) = lazymap[A, B] // works |
odersky
added a commit
that referenced
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May 10, 2023
Abolish restriction that box/unbox cannot be done with `cap`.
Instead, do a deep check for `cap`
- in type arguments for `sealed` type variables
- in the types of mutable vars
- in the type of `try` under the `saferExceptions` language import
The `caps.unsafe.{unsafeBox, unsafeUnbox, unsafeBoxFunArg}` methods are
not longer
needed and are deprecated. Instead there is an annotation
`annotation.unchecked.uncheckedCaptures` that
can be added to a mutable variable to turn off checking its type.
These changes in behavior are introduced in 3.3. Older source versions
still support the old behavior (which corresponds to the paper).
So to run examples in the paper as described there, they need a `-source
3.2` or a
language import.
Based on #17377
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Trial: change cc syntax