From 3907a17efb753f56a7c289984687c1c31375c494 Mon Sep 17 00:00:00 2001
From: "William D. Jones" <thor0505@comcast.net>
Date: Tue, 15 Jan 2019 16:05:25 -0500
Subject: [PATCH] hdl.xfrm: Add on_AnyConst and on_AnySeq abstract methods for
 ValueVisitor and children.

---
 nmigen/back/pysim.py | 12 ++++++++++++
 nmigen/hdl/xfrm.py   | 18 ++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/nmigen/back/pysim.py b/nmigen/back/pysim.py
index 1278923..95b2355 100644
--- a/nmigen/back/pysim.py
+++ b/nmigen/back/pysim.py
@@ -87,6 +87,12 @@ class _RHSValueCompiler(_ValueCompiler):
     def on_Const(self, value):
         return lambda state: value.value
 
+    def on_AnyConst(self, value):
+        raise NotImplementedError # :nocov:
+
+    def on_AnySeq(self, value):
+        raise NotImplementedError # :nocov:
+
     def on_Signal(self, value):
         if self.sensitivity is not None:
             self.sensitivity.add(value)
@@ -219,6 +225,12 @@ class _LHSValueCompiler(_ValueCompiler):
     def on_Const(self, value):
         raise TypeError # :nocov:
 
+    def on_AnyConst(self, value):
+        raise TypeError # :nocov:
+
+    def on_AnySeq(self, value):
+        raise TypeError # :nocov:
+
     def on_Signal(self, value):
         shape = value.shape()
         value_slot = self.signal_slots[value]
diff --git a/nmigen/hdl/xfrm.py b/nmigen/hdl/xfrm.py
index 33c534e..728b95b 100644
--- a/nmigen/hdl/xfrm.py
+++ b/nmigen/hdl/xfrm.py
@@ -23,6 +23,14 @@ class ValueVisitor(metaclass=ABCMeta):
     def on_Const(self, value):
         pass # :nocov:
 
+    @abstractmethod
+    def on_AnyConst(self, value):
+        pass # :nocov:
+
+    @abstractmethod
+    def on_AnySeq(self, value):
+        pass # :nocov:
+
     @abstractmethod
     def on_Signal(self, value):
         pass # :nocov:
@@ -69,6 +77,10 @@ class ValueVisitor(metaclass=ABCMeta):
     def on_value(self, value):
         if type(value) is Const:
             new_value = self.on_Const(value)
+        elif type(value) is AnyConst:
+            new_value = self.on_AnyConst(value)
+        elif type(value) is AnySeq:
+            new_value = self.on_AnySeq(value)
         elif type(value) is Signal:
             new_value = self.on_Signal(value)
         elif type(value) is Record:
@@ -104,6 +116,12 @@ class ValueTransformer(ValueVisitor):
     def on_Const(self, value):
         return value
 
+    def on_AnyConst(self, value):
+        return value
+
+    def on_AnySeq(self, value):
+        return value
+
     def on_Signal(self, value):
         return value
 
-- 
2.30.2