From 621cd0f008ef6bbebc092e8306b2ba5d96455837 Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Wed, 8 Mar 2023 21:32:37 -0500
Subject: [PATCH] Internals: Framework for renaming warnings (#4010 partial)

---
 src/V3Error.cpp | 1 +
 src/V3Error.h   | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/src/V3Error.cpp b/src/V3Error.cpp
index 2f1a01f20..670dd7185 100644
--- a/src/V3Error.cpp
+++ b/src/V3Error.cpp
@@ -40,6 +40,7 @@ V3ErrorCode::V3ErrorCode(const char* msgp) {
         const V3ErrorCode code{codei};
         if (0 == VL_STRCASECMP(msgp, code.ascii())) {
             m_e = code;
+            if (isRenamed()) m_e = renamedTo().m_e;
             return;
         }
     }
diff --git a/src/V3Error.h b/src/V3Error.h
index 05f865f13..2c02e8eaa 100644
--- a/src/V3Error.h
+++ b/src/V3Error.h
@@ -248,6 +248,12 @@ public:
         return (m_e == UNUSEDGENVAR || m_e == UNUSEDPARAM || m_e == UNUSEDSIGNAL);
     }
 
+    V3ErrorCode renamedTo() const {
+        // Return a new error this error has been renamed to
+        // e.g. if (m_e == LITENDIAN) return V3ErrorCode{RANGEASC};
+        return V3ErrorCode{EC_MIN};  // Not renamed; see isRenamed()
+    }
+    bool isRenamed() const { return renamedTo() != V3ErrorCode{EC_MIN}; }
     bool isUnder(V3ErrorCode other) {
         // backwards compatibility inheritance-like warnings
         if (m_e == other) { return true; }