Add macro for compile options materialize to prevent its use in chisel core

1 files changed, 8 insertions, 1 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/CompileOptions.scala b/chiselFrontend/src/main/scala/chisel3/core/CompileOptions.scala
index 4aa3ad33..f512bf26 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/CompileOptions.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/CompileOptions.scala
@@ -3,6 +3,7 @@
 package chisel3.core
 
 import scala.language.experimental.macros
+import scala.reflect.macros.blackbox.Context
 
 trait CompileOptions {
   // Should Record connections require a strict match of fields.
@@ -26,7 +27,13 @@ trait CompileOptions {
 
 object CompileOptions {
   // Provides a low priority Strict default. Can be overridden by importing the NotStrict option.
-  implicit def materialize: CompileOptions = chisel3.core.ExplicitCompileOptions.Strict
+  // Implemented as a macro to prevent this from being used inside chisel core.
+  implicit def materialize: CompileOptions = macro materialize_impl
+
+  def materialize_impl(c: Context): c.Tree = {
+    import c.universe._
+    q"_root_.chisel3.core.ExplicitCompileOptions.Strict"
+  }
 }
 
 object ExplicitCompileOptions {