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author | Eugene Burmako <xeno.by@gmail.com> | 2013-02-23 13:40:14 +0100 |
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committer | Eugene Burmako <xeno.by@gmail.com> | 2013-05-12 22:19:02 +0200 |
commit | c539ae2f56fe9f565cffb4afd6ab131bda89acb7 (patch) | |
tree | 30c9472e80b9732b713ab0efa0c148827808276f /test/files/run | |
parent | a35b6bc8e4369db8983d6d0d9881f37d7affbadd (diff) | |
download | scala-c539ae2f56fe9f565cffb4afd6ab131bda89acb7.tar.gz scala-c539ae2f56fe9f565cffb4afd6ab131bda89acb7.tar.bz2 scala-c539ae2f56fe9f565cffb4afd6ab131bda89acb7.zip |
SI-7167 implicit macros decide what is divergence
This is a port of https://github.com/scala/scala/commit/8168f118c9 from 2.10.x,
with an additional change to the `enclosingImplicits` and `openImplicits` APIs,
which encapsulates tuples of `pt` and `tree` into `ImplicitCandidate`.
Diffstat (limited to 'test/files/run')
5 files changed, 29 insertions, 2 deletions
diff --git a/test/files/run/macro-divergence-spurious.check b/test/files/run/macro-divergence-spurious.check new file mode 100644 index 0000000000..19765bd501 --- /dev/null +++ b/test/files/run/macro-divergence-spurious.check @@ -0,0 +1 @@ +null diff --git a/test/files/run/macro-divergence-spurious/Impls_Macros_1.scala b/test/files/run/macro-divergence-spurious/Impls_Macros_1.scala new file mode 100644 index 0000000000..bc4a9fded7 --- /dev/null +++ b/test/files/run/macro-divergence-spurious/Impls_Macros_1.scala @@ -0,0 +1,23 @@ +import scala.reflect.macros.Context +import language.experimental.macros + +trait Complex[T] + +class Foo(val bar: Bar) +class Bar(val s: String) + +object Complex { + def impl[T: c.WeakTypeTag](c: Context): c.Expr[Complex[T]] = { + import c.universe._ + val tpe = weakTypeOf[T] + for (f <- tpe.declarations.collect{case f: TermSymbol if f.isParamAccessor && !f.isMethod => f}) { + val trecur = appliedType(typeOf[Complex[_]], List(f.typeSignature)) + val recur = c.inferImplicitValue(trecur, silent = true) + if (recur == EmptyTree) c.abort(c.enclosingPosition, s"couldn't synthesize $trecur") + } + c.literalNull + } + + implicit object ComplexString extends Complex[String] + implicit def genComplex[T]: Complex[T] = macro impl[T] +} diff --git a/test/files/run/macro-divergence-spurious/Test_2.scala b/test/files/run/macro-divergence-spurious/Test_2.scala new file mode 100644 index 0000000000..dcc4593335 --- /dev/null +++ b/test/files/run/macro-divergence-spurious/Test_2.scala @@ -0,0 +1,3 @@ +object Test extends App { + println(implicitly[Complex[Foo]]) +}
\ No newline at end of file diff --git a/test/files/run/macro-sip19-revised/Impls_Macros_1.scala b/test/files/run/macro-sip19-revised/Impls_Macros_1.scala index 5f3f61ca3f..8d7d3b5d3d 100644 --- a/test/files/run/macro-sip19-revised/Impls_Macros_1.scala +++ b/test/files/run/macro-sip19-revised/Impls_Macros_1.scala @@ -7,7 +7,7 @@ object Macros { val inscope = c.inferImplicitValue(c.mirror.staticClass("SourceLocation").toType) val outer = c.Expr[SourceLocation](if (!inscope.isEmpty) inscope else Literal(Constant(null))) - val Apply(fun, args) = c.enclosingImplicits(0)._2 + val Apply(fun, args) = c.enclosingImplicits(0).tree val fileName = fun.pos.source.file.file.getName val line = fun.pos.line val charOffset = fun.pos.point diff --git a/test/files/run/macro-sip19/Impls_Macros_1.scala b/test/files/run/macro-sip19/Impls_Macros_1.scala index 535ec2ccf0..4c165ed1b8 100644 --- a/test/files/run/macro-sip19/Impls_Macros_1.scala +++ b/test/files/run/macro-sip19/Impls_Macros_1.scala @@ -3,7 +3,7 @@ import scala.reflect.macros.Context object Macros { def impl(c: Context) = { import c.universe._ - val Apply(fun, args) = c.enclosingImplicits(0)._2 + val Apply(fun, args) = c.enclosingImplicits(0).tree val fileName = fun.pos.source.file.file.getName val line = fun.pos.line val charOffset = fun.pos.point |