From ad92037d3437a902dff30c2239607a237c28a910 Mon Sep 17 00:00:00 2001
From: Mark Harrah <dmharrah@gmail.com>
Date: Tue, 18 Sep 2012 14:01:19 -0400
Subject: [PATCH] sample usage of separate macro configuration

---
 .../compiler-project/macro-config/build.sbt   | 26 +++++++++++++++++++
 .../macro-config/src/macro/scala/Def.scala    | 16 ++++++++++++
 .../macro-config/src/main/scala/Use.scala     |  8 ++++++
 .../compiler-project/macro-config/test        |  2 ++
 4 files changed, 52 insertions(+)
 create mode 100644 sbt/src/sbt-test/compiler-project/macro-config/build.sbt
 create mode 100644 sbt/src/sbt-test/compiler-project/macro-config/src/macro/scala/Def.scala
 create mode 100644 sbt/src/sbt-test/compiler-project/macro-config/src/main/scala/Use.scala
 create mode 100644 sbt/src/sbt-test/compiler-project/macro-config/test

diff --git a/sbt/src/sbt-test/compiler-project/macro-config/build.sbt b/sbt/src/sbt-test/compiler-project/macro-config/build.sbt
new file mode 100644
index 000000000..2d0ecc8cb
--- /dev/null
+++ b/sbt/src/sbt-test/compiler-project/macro-config/build.sbt
@@ -0,0 +1,26 @@
+// Adds a "macro" configuration for macro dependencies.
+// By default, this includes the dependencies of the normal sources.
+// Drop the `extend(Compile)` to include no dependencies (not even scala-library) by default.
+ivyConfigurations += config("macro").hide.extend(Compile)
+
+// add the compiler as a dependency for src/macro/
+libraryDependencies <+=
+  scalaVersion("org.scala-lang" % "scala-compiler" % _ % "macro")
+
+// adds standard compile, console, package tasks for src/macro/
+inConfig(config("macro"))(Defaults.configSettings)
+
+// puts the compiled macro on the classpath for the main sources
+unmanagedClasspath in Compile <++=
+  fullClasspath in config("macro")
+
+// includes sources in src/macro/ in the main source package
+mappings in (Compile, packageSrc) <++=
+  mappings in (config("macro"), packageSrc)
+
+// Includes classes compiled from src/macro/ in the main binary
+// This can be omitted if the classes in src/macro/ aren't used at runtime
+mappings in (Compile, packageBin) <++=
+  mappings in (config("macro"), packageBin)
+
+scalaVersion := "2.10.0-M7"
\ No newline at end of file
diff --git a/sbt/src/sbt-test/compiler-project/macro-config/src/macro/scala/Def.scala b/sbt/src/sbt-test/compiler-project/macro-config/src/macro/scala/Def.scala
new file mode 100644
index 000000000..59e22ecb9
--- /dev/null
+++ b/sbt/src/sbt-test/compiler-project/macro-config/src/macro/scala/Def.scala
@@ -0,0 +1,16 @@
+import scala.reflect.macros.Context
+import language.experimental.macros
+
+object Def
+{
+  def desugar(a: Any): String = macro desugarImpl
+
+  def desugarImpl(c: Context)(a: c.Expr[Any]) = {
+    import c.universe._
+
+    val s = show(a.tree)
+    c.Expr(
+      Literal(Constant(s))
+    )
+  }
+}
\ No newline at end of file
diff --git a/sbt/src/sbt-test/compiler-project/macro-config/src/main/scala/Use.scala b/sbt/src/sbt-test/compiler-project/macro-config/src/main/scala/Use.scala
new file mode 100644
index 000000000..c2be57a1a
--- /dev/null
+++ b/sbt/src/sbt-test/compiler-project/macro-config/src/main/scala/Use.scala
@@ -0,0 +1,8 @@
+object Use
+{
+	def main(args: Array[String])
+	{
+		val str = Def.desugar(3 + 5)
+		assert(str == args(0), s"Expected '${args(0)}', got '$str'")
+	}
+}
\ No newline at end of file
diff --git a/sbt/src/sbt-test/compiler-project/macro-config/test b/sbt/src/sbt-test/compiler-project/macro-config/test
new file mode 100644
index 000000000..973515cd6
--- /dev/null
+++ b/sbt/src/sbt-test/compiler-project/macro-config/test
@@ -0,0 +1,2 @@
+> run 8
+-> run 9