Rudimentary Macroparadise plugin, example and test

3 files changed, 50 insertions, 0 deletions

diff --git a/examples/macroparadise-example/Hello.scala b/examples/macroparadise-example/Hello.scala
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index 0000000..7e04dcb
--- /dev/null
+++ b/examples/macroparadise-example/Hello.scala
@@ -0,0 +1,6 @@
+package macroparadise_example
+import macros._
+
+@Main object Hello{
+  println("hello, world!")
+}
diff --git a/examples/macroparadise-example/build/build.scala b/examples/macroparadise-example/build/build.scala
new file mode 100644
index 0000000..28fb206
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+++ b/examples/macroparadise-example/build/build.scala
@@ -0,0 +1,19 @@
+package macroparadise_example_build
+import cbt._
+
+trait SharedSettings extends Macroparadise{
+  override def defaultScalaVersion = "2.12.2"
+}
+
+class Build(val context: Context) extends SharedSettings{
+  override def dependencies =
+    super.dependencies :+
+    new MacroBuild( context.copy( workingDirectory = projectDirectory / "macros" ) )
+}
+
+class MacroBuild(val context: Context) extends SharedSettings{
+  override def dependencies =
+    super.dependencies :+
+    Resolver( mavenCentral ).bindOne( ScalaDependency( "org.scalameta", "scalameta", "1.8.0" ) )
+}
+
diff --git a/examples/macroparadise-example/macros/Main.scala b/examples/macroparadise-example/macros/Main.scala
new file mode 100644
index 0000000..ecdce34
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+++ b/examples/macroparadise-example/macros/Main.scala
@@ -0,0 +1,25 @@
+package macroparadise_example.macros
+
+import scala.meta._
+import scala.collection.immutable.Seq
+
+class Main extends scala.annotation.StaticAnnotation {
+  inline def apply(defn: Any): Any = meta {
+    defn match {
+      case q"object $name { ..$stats }" =>
+        MainMacroImpl.expand(name, stats)
+      case _ =>
+        abort("@main must annotate an object.")
+    }
+  }
+}
+
+// This is an example how we can refactor the macro implementation into a utility
+// function which can be used for unit testing, see MainUnitTest.
+object MainMacroImpl {
+  def expand(name: Term.Name, stats: Seq[Stat]): Defn.Object = {
+    val main = q"def main(args: Array[String]): Unit = { ..$stats }"
+    q"object $name { $main }"
+  }
+}
+