Internals: Rename Ast on non-node classes (#3262). No functional change.

This commit has the following replacements applied:

	s/\bAstUserInUseBase\b/VNUserInUseBase/g;
        s/\bAstAttrType\b/VAttrType/g;
        s/\bAstBasicDTypeKwd\b/VBasicDTypeKwd/g;
        s/\bAstDisplayType\b/VDisplayType/g;
        s/\bAstNDeleter\b/VNDeleter/g;
        s/\bAstNRelinker\b/VNRelinker/g;
        s/\bAstNVisitor\b/VNVisitor/g;
        s/\bAstPragmaType\b/VPragmaType/g;
        s/\bAstType\b/VNType/g;
        s/\bAstUser1InUse\b/VNUser1InUse/g;
        s/\bAstUser2InUse\b/VNUser2InUse/g;
        s/\bAstUser3InUse\b/VNUser3InUse/g;
        s/\bAstUser4InUse\b/VNUser4InUse/g;
        s/\bAstUser5InUse\b/VNUser5InUse/g;
        s/\bAstVarType\b/VVarType/g;

src/V3Changed.cpp

@@ -115,7 +115,7 @@ public:
 //######################################################################
 // Utility visitor to find elements to be compared
 
-class ChangedInsertVisitor final : public AstNVisitor {
+class ChangedInsertVisitor final : public VNVisitor {
 private:
     // STATE
     ChangedState* m_statep = nullptr;  // Shared state across visitors
@@ -220,7 +220,7 @@ public:
             //          ...
             //          CHANGEDET(VARREF(_last), VARREF(var))
             AstVar* const newvarp
-                = new AstVar{varp->fileline(), AstVarType::MODULETEMP, newvarname, varp};
+                = new AstVar{varp->fileline(), VVarType::MODULETEMP, newvarname, varp};
             m_statep->m_topModp->addStmtp(newvarp);
             m_newvscp = new AstVarScope{m_vscp->fileline(), m_statep->m_scopetopp, newvarp};
             m_statep->m_scopetopp->addVarp(m_newvscp);
@@ -241,12 +241,12 @@ public:
 //######################################################################
 // Changed state, as a visitor of each AstNode
 
-class ChangedVisitor final : public AstNVisitor {
+class ChangedVisitor final : public VNVisitor {
 private:
     // NODE STATE
     // Entire netlist:
     //  AstVarScope::user1()            -> bool.  True indicates processed
-    const AstUser1InUse m_inuser1;
+    const VNUser1InUse m_inuser1;
 
     // STATE
     ChangedState* const m_statep;  // Shared state across visitors