Support for CapturingTypes #12947
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Support for CapturingTypes #12947
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- Introduce monadic capture set constraint handling - Change CapturingType to take a capture set instead of a single capture reference
Don't allow capture variables to be changed if `<:<` returns false.
Add element validation for capture variables. This can be used to disallow * in instances, or to give better error messages if variable bounds are violated.
# Conflicts: # compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala # tests/neg-custom-args/captures/boxmap.check # tests/neg-custom-args/captures/try.check # tests/neg-custom-args/captures/try2.check
# Conflicts: # compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala # compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala # compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala # tests/pos-custom-args/captures/boxmap.scala # tests/pos-custom-args/captures/cc-expand.scala
Need to strip again after dealiasing
Can be reverted once we assume type variables have by default a {*} Any upper bound.
pruneErasedDef's normalizations interfere with it.
This reverts commit 99d8395.
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Superseded by #13309, which is made against cc-experiment |
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Initial support for capturing types in the compiler, independent of a particular strategy to test them. This allows us to experiment with the strategy later.
Based on #12938