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author | Adriaan Moors <adriaan.moors@epfl.ch> | 2012-03-14 11:47:59 +0100 |
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committer | Adriaan Moors <adriaan.moors@epfl.ch> | 2012-03-20 19:54:03 +0100 |
commit | b046a6e3316df8b27ac31e71da1a139c800ccce7 (patch) | |
tree | dfbed2ea5620d100a62bbdf39b93488628e8cbb3 /src/compiler/scala/reflect/internal/Trees.scala | |
parent | 2d3b309a36757545901b99da1b77698749fcc0c5 (diff) | |
download | scala-b046a6e3316df8b27ac31e71da1a139c800ccce7.tar.gz scala-b046a6e3316df8b27ac31e71da1a139c800ccce7.tar.bz2 scala-b046a6e3316df8b27ac31e71da1a139c800ccce7.zip |
[vpm] typer synths Function{} for empty-sel match
typedMatchAnonFun is called from typedFunction when the function's body is a match
this is work-in-progres: the compiler currently won't bootstrap under -Yvirtpatmat
see also the pending test
make sure to use the right context in typeFunction when the body is a Match
when typer is set up for type checking a Function, the current owner is the symbol for the function,
but we'll type check a Block(List(ClassDef(cd)), New(cd)) when the function is a match,
and the function symbol is nowhere to be found, so go to outer context
in patmatvirt:
- simplified default case gen (no need for a Casegen instance)
- using CASE | SYNTHETIC to detect generated matches (for switches) and avoid typing them endlessly
more uniform, and necessary for new-style anon Function class instance gen for matches
Diffstat (limited to 'src/compiler/scala/reflect/internal/Trees.scala')
-rw-r--r-- | src/compiler/scala/reflect/internal/Trees.scala | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/compiler/scala/reflect/internal/Trees.scala b/src/compiler/scala/reflect/internal/Trees.scala index 9b1712b790..1a40e0105c 100644 --- a/src/compiler/scala/reflect/internal/Trees.scala +++ b/src/compiler/scala/reflect/internal/Trees.scala @@ -350,8 +350,9 @@ trait Trees extends api.Trees { self: SymbolTable => "subst[%s, %s](%s)".format(fromStr, toStr, (from, to).zipped map (_ + " -> " + _) mkString ", ") } - // NOTE: if symbols in `from` occur multiple times in the `tree` passed to `transform`, - // the resulting Tree will be a graph, not a tree... this breaks all sorts of stuff, + // NOTE: calls shallowDuplicate on trees in `to` to avoid problems when symbols in `from` + // occur multiple times in the `tree` passed to `transform`, + // otherwise, the resulting Tree would be a graph, not a tree... this breaks all sorts of stuff, // notably concerning the mutable aspects of Trees (such as setting their .tpe) class TreeSubstituter(from: List[Symbol], to: List[Tree]) extends Transformer { override def transform(tree: Tree): Tree = tree match { |