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author | Adriaan Moors <adriaan.moors@typesafe.com> | 2016-02-08 18:24:43 -0800 |
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committer | Adriaan Moors <adriaan.moors@typesafe.com> | 2016-03-26 22:52:41 -0700 |
commit | 8433b6fa0e86dfdcd3db31b97844b14d65e45359 (patch) | |
tree | 08d2db915b88057ff1b16479e797bbca41a385ce /test/files/pos/t6033.scala | |
parent | 651d67cff7af581751257711ad99d318a5a2879a (diff) | |
download | scala-8433b6fa0e86dfdcd3db31b97844b14d65e45359.tar.gz scala-8433b6fa0e86dfdcd3db31b97844b14d65e45359.tar.bz2 scala-8433b6fa0e86dfdcd3db31b97844b14d65e45359.zip |
Treat `Function` literals uniformly, expecting SAM or FunctionN.
They both compile to INDY/MetaLambdaFactory, except when they
occur in a constructor call. (TODO: can we lift the ctor arg
expression to a method and avoid statically synthesizing
anonymous subclass altogether?)
Typers:
- no longer synthesize SAMs -- *adapt* a Function literal
to the expected (SAM/FunctionN) type
- Deal with polymorphic/existential sams (relevant tests:
pos/t8310, pos/t5099.scala, pos/t4869.scala) We know where
to find the result type, as all Function nodes have a
FunctionN-shaped type during erasure. (Including function
literals targeting a SAM type -- the sam type is tracked as
the *expected* type.)
Lift restriction on sam types being class types. It's enough
that they dealias to one, like regular instance creation
expressions.
Contexts:
- No longer need encl method hack for return in sam.
Erasure:
- erasure preserves SAM type for function nodes
- Normalize sam to erased function type during erasure,
otherwise we may box the function body from `$anonfun(args)`
to `{$anonfun(args); ()}` because the expected type for the
body is now `Object`, and thus `Unit` does not conform.
Delambdafy:
- must set static flag before calling createBoxingBridgeMethod
- Refactored `createBoxingBridgeMethod` to wrap my head around
boxing, reworked it to generalize from FunctionN's boxing
needs to arbitrary LMF targets.
Other refactorings: ThisReferringMethodsTraverser, TreeGen.
Diffstat (limited to 'test/files/pos/t6033.scala')
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