From 89ec3d16dc3f43a006fb5c7acf5a345789a8918e Mon Sep 17 00:00:00 2001
From: Geza Lore <gezalore@gmail.com>
Date: Sun, 15 May 2022 13:30:04 +0100
Subject: [PATCH] Allow const nodes in VNRef

No functional change.
---
 src/V3Ast.h      | 2 +-
 src/V3Hasher.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/V3Ast.h b/src/V3Ast.h
index 4c306da80..ca00b8040 100644
--- a/src/V3Ast.h
+++ b/src/V3Ast.h
@@ -2150,7 +2150,7 @@ static_assert(sizeof(VNRef<AstNode>) == sizeof(std::reference_wrapper<AstNode>),
 // without having to copy nodes into the collections.
 
 // Forward declaration to avoid including V3Hasher.h which needs V3Ast.h (this file).
-size_t V3HasherUncachedHash(AstNode&);
+size_t V3HasherUncachedHash(const AstNode&);
 
 // Specialization of std::hash for VNRef
 template <typename T_Node>  //
diff --git a/src/V3Hasher.cpp b/src/V3Hasher.cpp
index 10c53d4c8..7cf3672b6 100644
--- a/src/V3Hasher.cpp
+++ b/src/V3Hasher.cpp
@@ -530,6 +530,6 @@ V3Hash V3Hasher::uncachedHash(const AstNode* nodep) {
 // This is used by the std::hash specialization for VNRef.
 // Declared separately to avoid a circular header dependency.
 
-size_t V3HasherUncachedHash(AstNode& node) {
+size_t V3HasherUncachedHash(const AstNode& node) {
     return static_cast<size_t>(V3Hasher::uncachedHash(&node).value());
 }