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authorLoic Descotte <loic.descotte@gmail.com>2017-11-11 08:04:42 +0100
committerLoic Descotte <loic.descotte@gmail.com>2017-11-11 08:24:30 +0100
commit2cd897dd1bb05981fac1fc9d61ee32f26a16c35b (patch)
treec2fb5fa0a884f501e053eb979e6dd0862f54336e /examples/src/main/scala/default.scala
parentefe98a7d0b134415f3da0e7a7c3cb6ca5f2b44c4 (diff)
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scalajs cross build
Diffstat (limited to 'examples/src/main/scala/default.scala')
-rw-r--r--examples/src/main/scala/default.scala35
1 files changed, 0 insertions, 35 deletions
diff --git a/examples/src/main/scala/default.scala b/examples/src/main/scala/default.scala
deleted file mode 100644
index 4c1b634..0000000
--- a/examples/src/main/scala/default.scala
+++ /dev/null
@@ -1,35 +0,0 @@
-package magnolia.examples
-
-import magnolia._
-import scala.language.experimental.macros
-
-/** typeclass for providing a default value for a particular type */
-trait Default[T] { def default: T }
-
-/** companion object and derivation object for [[Default]] */
-object Default {
-
- type Typeclass[T] = Default[T]
-
- /** constructs a default for each parameter, using the constructor default (if provided),
- * otherwise using a typeclass-provided default */
- def combine[T](ctx: CaseClass[Default, T]): Default[T] = new Default[T] {
- def default = ctx.construct { param =>
- param.default.getOrElse(param.typeclass.default)
- }
- }
-
- /** chooses which subtype to delegate to */
- def dispatch[T](ctx: SealedTrait[Default, T])(): Default[T] = new Default[T] {
- def default: T = ctx.subtypes.head.typeclass.default
- }
-
- /** default value for a string; the empty string */
- implicit val string: Default[String] = new Default[String] { def default = "" }
-
- /** default value for ints; 0 */
- implicit val int: Default[Int] = new Default[Int] { def default = 0 }
-
- /** generates default instances of [[Default]] for case classes and sealed traits */
- implicit def gen[T]: Default[T] = macro Magnolia.gen[T]
-}