From 37c5af1c0d91f7e5d2f6e15d511d80a0f8553f4d Mon Sep 17 00:00:00 2001
From: Henry Cook <henry@sifive.com>
Date: Fri, 8 Sep 2017 16:17:45 -0700
Subject: [PATCH] diplomacy: add x"..." string context

Enables hex address literals containing underscores.
Converts them to BigInts.
---
 src/main/scala/diplomacy/package.scala | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/scala/diplomacy/package.scala b/src/main/scala/diplomacy/package.scala
index 90e9ee71..713396bb 100644
--- a/src/main/scala/diplomacy/package.scala
+++ b/src/main/scala/diplomacy/package.scala
@@ -22,6 +22,13 @@ package object diplomacy
     }
   }
 
+  implicit class BigIntHexContext(val sc: StringContext) extends AnyVal {
+    def x(args: Any*): BigInt = {
+      val orig = sc.s(args: _*)
+      BigInt(orig.replace("_", ""), 16)
+    }
+  }
+
   def SinkCardinality[T](body: Parameters => T)(implicit p: Parameters) = body(p.alterPartial {
     case CardinalityInferenceDirectionKey => CardinalityInferenceDirection.SINK_TO_SOURCE
   })