xuwei-k · September 11, 2019 08:36 · Feb 20, 2013 · Feb 20, 2013
diff --git a/README.md b/README.md
@@ -1,2 +1,2 @@
-- inspired [macrocosm](https://github.com/retronym/macrocosm/blob/521dfc0bcd1/src/main/scala/com/github/retronym/macrocosm/Macrocosm.scala#L102-L128) and [inkytonik's blog post](http://hootenannylas.blogspot.com.au/2013/02/syntax-checking-in-scala-string.html)
+- inspired by [macrocosm](https://github.com/retronym/macrocosm/blob/521dfc0bcd1/src/main/scala/com/github/retronym/macrocosm/Macrocosm.scala#L102-L128) and [inkytonik's blog post](http://hootenannylas.blogspot.com.au/2013/02/syntax-checking-in-scala-string.html)
 - Can not use if `$` character contains. Does anyone have a solution? :(
diff --git a/Macros.scala b/Macros.scala
@@ -0,0 +1,25 @@
+import scala.reflect.macros.Context
+import scala.util.matching.Regex
+import java.util.regex.PatternSyntaxException
+
+object Macros{
+
+  implicit class RegexContext(val c: StringContext) {
+    def r(): Regex = macro regexImpl
+  }
+
+  def regexImpl(c: Context)(): c.Expr[Regex] = {
+    import c.universe._
+    c.prefix.tree match {
+      case Apply(_,List(Apply(_,List(Literal(Constant(str: String)))))) =>
+        try{
+          str.r
+        }catch{
+          case e: PatternSyntaxException => c.abort(c.enclosingPosition, e.toString)
+        }
+        val Apply(fun, _) = reify(new Regex("")).tree
+        c.Expr[Regex](Apply.apply(fun, c.literal(str).tree :: Nil))
+    }
+  }
+
+}
diff --git a/Main.scala b/Main.scala
@@ -0,0 +1,7 @@
+import Macros._
+
+object Main extends App{
+  println(r"foo|bar") // compile success !
+  println(r"[foo") // compile error !
+  println(r"foo$") // error: invalid string interpolation: `$$', `$'ident or `$'BlockExpr expected 
+}
diff --git a/README.md b/README.md
@@ -0,0 +1,2 @@
+- inspired [macrocosm](https://github.com/retronym/macrocosm/blob/521dfc0bcd1/src/main/scala/com/github/retronym/macrocosm/Macrocosm.scala#L102-L128) and [inkytonik's blog post](http://hootenannylas.blogspot.com.au/2013/02/syntax-checking-in-scala-string.html)
+- Can not use if `$` character contains. Does anyone have a solution? :(
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		- inspired [macrocosm](https://github.com/retronym/macrocosm/blob/521dfc0bcd1/src/main/scala/com/github/retronym/macrocosm/Macrocosm.scala#L102-L128) and [inkytonik's blog post](http://hootenannylas.blogspot.com.au/2013/02/syntax-checking-in-scala-string.html)
		- Can not use if `$` character contains. Does anyone have a solution? :(