diff options
Diffstat (limited to 'test/files')
-rw-r--r-- | test/files/pos/t8013.flags | 1 | ||||
-rw-r--r-- | test/files/pos/t8013/inpervolated_2.scala | 11 | ||||
-rw-r--r-- | test/files/pos/t8013/inpervolator_1.scala | 33 |
3 files changed, 45 insertions, 0 deletions
diff --git a/test/files/pos/t8013.flags b/test/files/pos/t8013.flags new file mode 100644 index 0000000000..954eaba352 --- /dev/null +++ b/test/files/pos/t8013.flags @@ -0,0 +1 @@ +-Xfatal-warnings -Xlint diff --git a/test/files/pos/t8013/inpervolated_2.scala b/test/files/pos/t8013/inpervolated_2.scala new file mode 100644 index 0000000000..90e571b42c --- /dev/null +++ b/test/files/pos/t8013/inpervolated_2.scala @@ -0,0 +1,11 @@ +/* + * scalac: -Xfatal-warnings -Xlint + */ +package t8013 + +// unsuspecting user of perverse macro +trait User { + import Perverse.Impervolator + val foo = "bar" + Console println p"Hello, $foo" +} diff --git a/test/files/pos/t8013/inpervolator_1.scala b/test/files/pos/t8013/inpervolator_1.scala new file mode 100644 index 0000000000..fb71571afc --- /dev/null +++ b/test/files/pos/t8013/inpervolator_1.scala @@ -0,0 +1,33 @@ + +package t8013 + +// perverse macro to confuse Xlint + +import scala.language.experimental.macros +import scala.reflect.macros.{ BlackboxContext => Context } + +object Perverse { + + implicit class Impervolator(sc: StringContext) { + def p(args: Any*): String = macro pImpl + } + + // turn a nice interpolation into something that looks + // nothing like an interpolation or anything we might + // recognize, but which includes a "$id" in an apply. + def pImpl(c: Context)(args: c.Expr[Any]*): c.Expr[String] = { + import c.universe._ + val macroPos = c.macroApplication.pos + val text = macroPos.lineContent substring macroPos.column + val tt = Literal(Constant(text)) + val tree = q"t8013.Perverse.pervert($tt)" + c.Expr[String](tree) + } + + // identity doesn't seem very perverse in this context + //def pervert(text: String): String = text + def pervert(text: String): String = { + Console println s"Perverting [$text]" + text + } +} |