From 75b44a6f723762cc3ebc911483beb2aec4cfee78 Mon Sep 17 00:00:00 2001 From: Eugene Burmako Date: Tue, 25 Dec 2012 14:09:33 +0100 Subject: [nomaster] macro expansions are now auto-duplicated The fix still requires macro developers to be careful about sharing trees by references, because attributed DefTrees will still bring trouble. However this is an improvement, because it doesn't make matters worse and automatically fixes situations similar to one in the test. A much more thorough discussion with a number of open questions left: http://groups.google.com/group/scala-internals/browse_thread/thread/492560d941b315cc Was fixed ages ago in master in one of the paradise backports. Never got to 2.10.x, but it's very useful, so I'm backporting it now. --- test/files/run/macro-auto-duplicate/Macros_1.scala | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 test/files/run/macro-auto-duplicate/Macros_1.scala (limited to 'test/files/run/macro-auto-duplicate/Macros_1.scala') diff --git a/test/files/run/macro-auto-duplicate/Macros_1.scala b/test/files/run/macro-auto-duplicate/Macros_1.scala new file mode 100644 index 0000000000..e3df05ba50 --- /dev/null +++ b/test/files/run/macro-auto-duplicate/Macros_1.scala @@ -0,0 +1,17 @@ +import scala.reflect.macros.Context +import language.experimental.macros + +object Macros { + def impl(c: Context) = { + import c.universe._ + val x = Ident(newTermName("x")) + def defAndUseX(rhs: Tree) = { + Block(List(ValDef(NoMods, newTermName("x"), TypeTree(), rhs)), x) + } + val xi4 = defAndUseX(Literal(Constant(4))) + val xs2 = defAndUseX(Literal(Constant("2"))) + c.Expr[String](Apply(Select(xi4, newTermName("$plus")), List(xs2))) + } + + def foo = macro impl +} \ No newline at end of file -- cgit v1.2.3