diff --git a/src/V3Begin.cpp b/src/V3Begin.cpp
index 680f3b8b4..9af5384a6 100644
--- a/src/V3Begin.cpp
+++ b/src/V3Begin.cpp
@@ -95,8 +95,8 @@ private:
                 m_unnamedScope = dot(m_unnamedScope, ident);
                 // Create CellInline for dotted var resolution
                 if (!m_ftaskp) {
-                    AstCellInline* const inlinep = new AstCellInline(
-                        nodep->fileline(), m_unnamedScope, blockName, m_modp->timeunit());
+                    AstCellInline* const inlinep = new AstCellInline{
+                        nodep->fileline(), m_unnamedScope, blockName, m_modp->timeunit()};
                     m_modp->addInlinesp(inlinep);  // Must be parsed before any AstCells
                 }
             }
diff --git a/src/V3Broken.cpp b/src/V3Broken.cpp
index 9b76b8d2b..2ff17e9f6 100644
--- a/src/V3Broken.cpp
+++ b/src/V3Broken.cpp
@@ -355,8 +355,8 @@ void V3Broken::brokenAll(AstNetlist* nodep) {
 
 void V3Broken::selfTest() {
     // Exercise addNewed and deleted for coverage, as otherwise only used with VL_LEAK_CHECKS
-    FileLine* const fl = new FileLine(FileLine::commandLineFilename());
-    const AstNode* const newp = new AstBegin(fl, "[EditWrapper]", nullptr);
+    FileLine* const fl = new FileLine{FileLine::commandLineFilename()};
+    const AstNode* const newp = new AstBegin{fl, "[EditWrapper]", nullptr};
     addNewed(newp);
     deleted(newp);
     VL_DO_DANGLING(delete newp, newp);
diff --git a/src/V3Clock.cpp b/src/V3Clock.cpp
index 31661a277..501e42098 100644
--- a/src/V3Clock.cpp
+++ b/src/V3Clock.cpp
@@ -58,7 +58,7 @@ private:
         UASSERT_OBJ(!nodep->access().isRW(), nodep, "Cannot handle a READWRITE reference");
         if (nodep->access().isWriteOnly()) {
             nodep->replaceWith(
-                new AstVarRef(nodep->fileline(), nodep->varScopep(), VAccess::READ));
+                new AstVarRef{nodep->fileline(), nodep->varScopep(), VAccess::READ});
         }
     }
 
@@ -113,7 +113,7 @@ private:
     AstIf* makeActiveIf(AstSenTree* sensesp) {
         AstNode* const senEqnp = createSenseEquation(sensesp->sensesp());
         UASSERT_OBJ(senEqnp, sensesp, "No sense equation, shouldn't be in sequent activation.");
-        AstIf* const newifp = new AstIf(sensesp->fileline(), senEqnp);
+        AstIf* const newifp = new AstIf{sensesp->fileline(), senEqnp};
         return newifp;
     }
     void clearLastSen() {
@@ -130,11 +130,11 @@ private:
         AstNode* const changeWrp = nodep->changep()->unlinkFrBack();
         AstNode* const changeRdp = ConvertWriteRefsToRead::main(changeWrp->cloneTree(false));
         AstIf* const newp
-            = new AstIf(nodep->fileline(), new AstXor(nodep->fileline(), origp, changeRdp), incp);
+            = new AstIf{nodep->fileline(), new AstXor{nodep->fileline(), origp, changeRdp}, incp};
         // We could add another IF to detect posedges, and only increment if so.
         // It's another whole branch though versus a potential memory miss.
         // We'll go with the miss.
-        newp->addThensp(new AstAssign(nodep->fileline(), changeWrp, origp->cloneTree(false)));
+        newp->addThensp(new AstAssign{nodep->fileline(), changeWrp, origp->cloneTree(false)});
         nodep->replaceWith(newp);
         VL_DO_DANGLING(nodep->deleteTree(), nodep);
     }
diff --git a/src/V3Config.cpp b/src/V3Config.cpp
index d71b7cc16..9570c7245 100644
--- a/src/V3Config.cpp
+++ b/src/V3Config.cpp
@@ -105,10 +105,10 @@ public:
     // Apply all attributes to the variable
     void apply(AstVar* varp) {
         for (const_iterator it = begin(); it != end(); ++it) {
-            AstNode* const newp = new AstAttrOf(varp->fileline(), it->m_type);
+            AstNode* const newp = new AstAttrOf{varp->fileline(), it->m_type};
             varp->addAttrsp(newp);
             if (it->m_type == VAttrType::VAR_PUBLIC_FLAT_RW && it->m_sentreep) {
-                newp->addNext(new AstAlwaysPublic(varp->fileline(), it->m_sentreep, nullptr));
+                newp->addNext(new AstAlwaysPublic{varp->fileline(), it->m_sentreep, nullptr});
             }
         }
     }
@@ -143,9 +143,9 @@ public:
 
     void apply(AstNodeFTask* ftaskp) const {
         if (m_noinline)
-            ftaskp->addStmtsp(new AstPragma(ftaskp->fileline(), VPragmaType::NO_INLINE_TASK));
+            ftaskp->addStmtsp(new AstPragma{ftaskp->fileline(), VPragmaType::NO_INLINE_TASK});
         if (m_public)
-            ftaskp->addStmtsp(new AstPragma(ftaskp->fileline(), VPragmaType::PUBLIC_TASK));
+            ftaskp->addStmtsp(new AstPragma{ftaskp->fileline(), VPragmaType::PUBLIC_TASK});
         // Only functions can have isolate (return value)
         if (VN_IS(ftaskp, Func)) ftaskp->attrIsolateAssign(m_isolate);
     }
@@ -194,7 +194,7 @@ public:
         if (m_inline) {
             const VPragmaType type
                 = m_inlineValue ? VPragmaType::INLINE_MODULE : VPragmaType::NO_INLINE_MODULE;
-            AstNode* const nodep = new AstPragma(modp->fileline(), type);
+            AstNode* const nodep = new AstPragma{modp->fileline(), type};
             modp->addStmtsp(nodep);
         }
         for (const auto& itr : m_modPragmas) {
@@ -208,7 +208,7 @@ public:
         if (!nodep->unnamed()) {
             for (const string& i : m_coverageOffBlocks) {
                 if (VString::wildmatch(nodep->name(), i)) {
-                    nodep->addStmtsp(new AstPragma(nodep->fileline(), pragma));
+                    nodep->addStmtsp(new AstPragma{nodep->fileline(), pragma});
                 }
             }
         }
@@ -302,7 +302,7 @@ public:
         // Apply to block at this line
         const VPragmaType pragma = VPragmaType::COVERAGE_BLOCK_OFF;
         if (lineMatch(nodep->fileline()->lineno(), pragma)) {
-            nodep->addStmtsp(new AstPragma(nodep->fileline(), pragma));
+            nodep->addStmtsp(new AstPragma{nodep->fileline(), pragma});
         }
     }
     void applyCase(AstCase* nodep) {
@@ -569,14 +569,14 @@ void V3Config::addVarAttr(FileLine* fl, const string& module, const string& ftas
                 fl->v3error("Signals inside functions/tasks cannot be marked forceable");
             } else {
                 V3ConfigResolver::s().modules().at(module).vars().at(var).push_back(
-                    V3ConfigVarAttr(attr));
+                    V3ConfigVarAttr{attr});
             }
         } else {
             V3ConfigModule& mod = V3ConfigResolver::s().modules().at(module);
             if (ftask.empty()) {
-                mod.vars().at(var).push_back(V3ConfigVarAttr(attr, sensep));
+                mod.vars().at(var).push_back(V3ConfigVarAttr{attr, sensep});
             } else {
-                mod.ftasks().at(ftask).vars().at(var).push_back(V3ConfigVarAttr(attr, sensep));
+                mod.ftasks().at(ftask).vars().at(var).push_back(V3ConfigVarAttr{attr, sensep});
             }
         }
     }
diff --git a/src/V3DepthBlock.cpp b/src/V3DepthBlock.cpp
index 69497def3..09ea0c1eb 100644
--- a/src/V3DepthBlock.cpp
+++ b/src/V3DepthBlock.cpp
@@ -53,14 +53,14 @@ private:
         // Create sub function
         AstScope* const scopep = m_cfuncp->scopep();
         const string name = m_cfuncp->name() + "__deep" + cvtToStr(++m_deepNum);
-        AstCFunc* const funcp = new AstCFunc(nodep->fileline(), name, scopep);
+        AstCFunc* const funcp = new AstCFunc{nodep->fileline(), name, scopep};
         funcp->slow(m_cfuncp->slow());
         funcp->isStatic(m_cfuncp->isStatic());
         funcp->isLoose(m_cfuncp->isLoose());
         funcp->addStmtsp(nodep);
         scopep->addBlocksp(funcp);
         // Call sub function at the point where the body was removed from
-        AstCCall* const callp = new AstCCall(nodep->fileline(), funcp);
+        AstCCall* const callp = new AstCCall{nodep->fileline(), funcp};
         callp->dtypeSetVoid();
         if (VN_IS(m_modp, Class)) {
             funcp->argTypes(EmitCBaseVisitor::symClassVar());
diff --git a/src/V3EmitXml.cpp b/src/V3EmitXml.cpp
index 17a35a426..db6ec800f 100644
--- a/src/V3EmitXml.cpp
+++ b/src/V3EmitXml.cpp
@@ -441,7 +441,7 @@ void V3EmitXml::emitxml() {
     const string filename = (v3Global.opt.xmlOutput().empty()
                                  ? v3Global.opt.makeDir() + "/" + v3Global.opt.prefix() + ".xml"
                                  : v3Global.opt.xmlOutput());
-    V3OutXmlFile of(filename);
+    V3OutXmlFile of{filename};
     of.putsHeader();
     of.puts("<!-- DESCR"
             "IPTION: Verilator output: XML representation of netlist -->\n");
diff --git a/src/V3Global.cpp b/src/V3Global.cpp
index 34cbe343b..dd9ec4ac5 100644
--- a/src/V3Global.cpp
+++ b/src/V3Global.cpp
@@ -52,14 +52,14 @@ void V3Global::readFiles() {
     //   AstNode::user4p()      // VSymEnt*    Package and typedef symbol names
     const VNUser4InUse inuser4;
 
-    VInFilter filter(v3Global.opt.pipeFilter());
-    V3ParseSym parseSyms(v3Global.rootp());  // Symbol table must be common across all parsing
+    VInFilter filter{v3Global.opt.pipeFilter()};
+    V3ParseSym parseSyms{v3Global.rootp()};  // Symbol table must be common across all parsing
 
     V3Parse parser(v3Global.rootp(), &filter, &parseSyms);
     // Read top module
     const V3StringList& vFiles = v3Global.opt.vFiles();
     for (const string& filename : vFiles) {
-        parser.parseFile(new FileLine(FileLine::commandLineFilename()), filename, false,
+        parser.parseFile(new FileLine{FileLine::commandLineFilename()}, filename, false,
                          "Cannot find file containing module: ");
     }
 
@@ -68,7 +68,7 @@ void V3Global::readFiles() {
     // this needs to be done after the top file is read
     const V3StringSet& libraryFiles = v3Global.opt.libraryFiles();
     for (const string& filename : libraryFiles) {
-        parser.parseFile(new FileLine(FileLine::commandLineFilename()), filename, true,
+        parser.parseFile(new FileLine{FileLine::commandLineFilename()}, filename, true,
                          "Cannot find file containing library module: ");
     }
     // v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("parse.tree"));
diff --git a/src/V3InstrCount.cpp b/src/V3InstrCount.cpp
index 7aff91d73..b72e352e6 100644
--- a/src/V3InstrCount.cpp
+++ b/src/V3InstrCount.cpp
@@ -333,6 +333,6 @@ private:
 
 uint32_t V3InstrCount::count(AstNode* nodep, bool assertNoDups, std::ostream* osp) {
     const InstrCountVisitor visitor{nodep, assertNoDups, osp};
-    if (osp) InstrCountDumpVisitor dumper(nodep, osp);
+    if (osp) InstrCountDumpVisitor dumper{nodep, osp};
     return visitor.instrCount();
 }
diff --git a/src/V3Localize.cpp b/src/V3Localize.cpp
index 1de5d06e3..4a30bcc7b 100644
--- a/src/V3Localize.cpp
+++ b/src/V3Localize.cpp
@@ -106,7 +106,7 @@ private:
                           ? oldVarp->name()
                           : nodep->scopep()->nameDotless() + "__DOT__" + oldVarp->name();
                 AstVar* const newVarp
-                    = new AstVar(oldVarp->fileline(), oldVarp->varType(), newName, oldVarp);
+                    = new AstVar{oldVarp->fileline(), oldVarp->varType(), newName, oldVarp};
                 newVarp->funcLocal(true);
                 funcp->addInitsp(newVarp);
 
diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 64b9d2b60..e438d646e 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -1688,7 +1688,7 @@ void V3Options::parseOptsFile(FileLine* fl, const string& filename, bool rel) {
     whole_file += "\n";  // So string match below is simplified
     if (inCmt) fl->v3error("Unterminated /* comment inside -f file.");
 
-    fl = new FileLine(filename);
+    fl = new FileLine{filename};
 
     // Split into argument list and process
     // Note we try to respect escaped char, double/simple quoted strings
diff --git a/src/V3ParseGrammar.cpp b/src/V3ParseGrammar.cpp
index 0c0fbf969..2c1c31e47 100644
--- a/src/V3ParseGrammar.cpp
+++ b/src/V3ParseGrammar.cpp
@@ -73,12 +73,12 @@ AstArg* V3ParseGrammar::argWrapList(AstNode* nodep) {
     // Convert list of expressions to list of arguments
     if (!nodep) return nullptr;
     AstArg* outp = nullptr;
-    AstBegin* const tempp = new AstBegin(nodep->fileline(), "[EditWrapper]", nodep);
+    AstBegin* const tempp = new AstBegin{nodep->fileline(), "[EditWrapper]", nodep};
     while (nodep) {
         AstNode* const nextp = nodep->nextp();
         AstNode* const exprp = nodep->unlinkFrBack();
         nodep = nextp;
-        outp = AstNode::addNext(outp, new AstArg(exprp->fileline(), "", exprp));
+        outp = AstNode::addNext(outp, new AstArg{exprp->fileline(), "", exprp});
     }
     VL_DO_DANGLING(tempp->deleteTree(), tempp);
     return outp;
@@ -127,22 +127,22 @@ AstNodeDType* V3ParseGrammar::createArray(AstNodeDType* basep, AstNodeRange* nra
             AstRange* const rangep = VN_CAST(nrangep, Range);
             if (rangep && isPacked) {
                 arrayp
-                    = new AstPackArrayDType(rangep->fileline(), VFlagChildDType(), arrayp, rangep);
+                    = new AstPackArrayDType{rangep->fileline(), VFlagChildDType(), arrayp, rangep};
             } else if (rangep
                        && (VN_IS(rangep->leftp(), Unbounded)
                            || VN_IS(rangep->rightp(), Unbounded))) {
-                arrayp = new AstQueueDType(nrangep->fileline(), VFlagChildDType(), arrayp,
-                                           rangep->rightp()->cloneTree(true));
+                arrayp = new AstQueueDType{nrangep->fileline(), VFlagChildDType(), arrayp,
+                                           rangep->rightp()->cloneTree(true)};
             } else if (rangep) {
-                arrayp = new AstUnpackArrayDType(rangep->fileline(), VFlagChildDType(), arrayp,
-                                                 rangep);
+                arrayp = new AstUnpackArrayDType{rangep->fileline(), VFlagChildDType{}, arrayp,
+                                                 rangep};
             } else if (VN_IS(nrangep, UnsizedRange)) {
-                arrayp = new AstUnsizedArrayDType(nrangep->fileline(), VFlagChildDType(), arrayp);
+                arrayp = new AstUnsizedArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp};
             } else if (VN_IS(nrangep, BracketRange)) {
                 const AstBracketRange* const arangep = VN_AS(nrangep, BracketRange);
                 AstNode* const keyp = arangep->elementsp()->unlinkFrBack();
-                arrayp = new AstBracketArrayDType(nrangep->fileline(), VFlagChildDType(), arrayp,
-                                                  keyp);
+                arrayp = new AstBracketArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp,
+                                                  keyp};
             } else if (VN_IS(nrangep, WildcardRange)) {
                 arrayp = new AstWildcardArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp};
             } else {
@@ -166,7 +166,7 @@ AstVar* V3ParseGrammar::createVariable(FileLine* fileline, const string& name,
     }
     if (GRAMMARP->m_varDecl == VVarType::WREAL) {
         // dtypep might not be null, might be implicit LOGIC before we knew better
-        dtypep = new AstBasicDType(fileline, VBasicDTypeKwd::DOUBLE);
+        dtypep = new AstBasicDType{fileline, VBasicDTypeKwd::DOUBLE};
     }
     if (!dtypep) {  // Created implicitly
         if (m_insideProperty) {
@@ -199,7 +199,7 @@ AstVar* V3ParseGrammar::createVariable(FileLine* fileline, const string& name,
     // ARRAYDTYPE0(ARRAYDTYPE1(ARRAYDTYPE2(BASICTYPE3), RANGE), RANGE)
     AstNodeDType* const arrayDTypep = createArray(dtypep, arrayp, false);
 
-    AstVar* const nodep = new AstVar(fileline, type, name, VFlagChildDType(), arrayDTypep);
+    AstVar* const nodep = new AstVar{fileline, type, name, VFlagChildDType(), arrayDTypep};
     nodep->addAttrsp(attrsp);
     nodep->ansi(m_pinAnsi);
     nodep->declTyped(m_varDeclTyped);
@@ -222,7 +222,7 @@ AstVar* V3ParseGrammar::createVariable(FileLine* fileline, const string& name,
     }
     if (VN_IS(dtypep, ParseTypeDType)) {
         // Parser needs to know what is a type
-        AstNode* const newp = new AstTypedefFwd(fileline, name);
+        AstNode* const newp = new AstTypedefFwd{fileline, name};
         AstNode::addNext<AstNode, AstNode>(nodep, newp);
         SYMP->reinsert(newp);
     }
diff --git a/src/V3ParseImp.cpp b/src/V3ParseImp.cpp
index cb26c7026..c73b6b64c 100644
--- a/src/V3ParseImp.cpp
+++ b/src/V3ParseImp.cpp
@@ -196,7 +196,7 @@ double V3ParseImp::lexParseTimenum(const char* textp) {
     }
     *dp++ = '\0';
     const double d = strtod(strgp, nullptr);
-    const string suffix(sp);
+    const string suffix{sp};
 
     double divisor = 1;
     if (suffix == "s") {
@@ -240,7 +240,7 @@ size_t V3ParseImp::ppInputToLex(char* buf, size_t max_size) {
         got += len;
     }
     if (debug() >= 9) {
-        const string out = string(buf, got);
+        const string out = std::string{buf, got};
         cout << "   inputToLex  got=" << got << " '" << out << "'" << endl;
     }
     // Note returns 0 at EOF
@@ -274,7 +274,7 @@ void V3ParseImp::parseFile(FileLine* fileline, const string& modfilename, bool i
     const string modname = V3Os::filenameNonExt(modfilename);
 
     UINFO(2, __FUNCTION__ << ": " << modname << (inLibrary ? " [LIB]" : "") << endl);
-    m_lexFileline = new FileLine(fileline);
+    m_lexFileline = new FileLine{fileline};
     m_lexFileline->newContent();
     m_bisonLastFileline = m_lexFileline;
     m_inLibrary = inLibrary;
@@ -284,7 +284,7 @@ void V3ParseImp::parseFile(FileLine* fileline, const string& modfilename, bool i
     if (!ok) {
         if (errmsg != "") return;  // Threw error already
         // Create fake node for later error reporting
-        AstNodeModule* const nodep = new AstNotFoundModule(fileline, modname);
+        AstNodeModule* const nodep = new AstNotFoundModule{fileline, modname};
         v3Global.rootp()->addModulesp(nodep);
         return;
     }
@@ -589,7 +589,7 @@ std::ostream& operator<<(std::ostream& os, const V3ParseBisonYYSType& rhs) {
 // V3Parse functions
 
 V3Parse::V3Parse(AstNetlist* rootp, VInFilter* filterp, V3ParseSym* symp) {
-    m_impp = new V3ParseImp(rootp, filterp, symp);
+    m_impp = new V3ParseImp{rootp, filterp, symp};
 }
 V3Parse::~V3Parse() {  //
     VL_DO_CLEAR(delete m_impp, m_impp = nullptr);
diff --git a/src/V3PreProc.cpp b/src/V3PreProc.cpp
index 6aadb69f7..4bc4f0d76 100644
--- a/src/V3PreProc.cpp
+++ b/src/V3PreProc.cpp
@@ -263,10 +263,10 @@ public:
     void configure(FileLine* filelinep) {
         // configure() separate from constructor to avoid calling abstract functions
         m_preprocp = this;  // Silly, but to make code more similar to Verilog-Perl
-        m_finFilelinep = new FileLine(filelinep->filename());
+        m_finFilelinep = new FileLine{filelinep->filename()};
         m_finFilelinep->lineno(1);
         // Create lexer
-        m_lexp = new V3PreLex(this, filelinep);
+        m_lexp = new V3PreLex{this, filelinep};
         m_lexp->m_keepComments = keepComments();
         m_lexp->m_keepWhitespace = keepWhitespace();
         m_lexp->m_pedantic = pedantic();
@@ -793,7 +793,7 @@ void V3PreProcImp::openFile(FileLine*, VInFilter* filterp, const string& filenam
     }
 
     // Save file contents for future error reporting
-    FileLine* const flsp = new FileLine(filename);
+    FileLine* const flsp = new FileLine{filename};
     flsp->lineno(1);
     flsp->newContent();
     for (const string& i : wholefile) flsp->contentp()->pushText(i);
diff --git a/src/V3PreShell.cpp b/src/V3PreShell.cpp
index 0502535af..9236283ca 100644
--- a/src/V3PreShell.cpp
+++ b/src/V3PreShell.cpp
@@ -46,10 +46,10 @@ protected:
     void boot() {
         // Create the implementation pointer
         if (!s_preprocp) {
-            FileLine* const cmdfl = new FileLine(FileLine::commandLineFilename());
+            FileLine* const cmdfl = new FileLine{FileLine::commandLineFilename()};
             s_preprocp = V3PreProc::createPreProc(cmdfl);
             // Default defines
-            FileLine* const prefl = new FileLine(FileLine::builtInFilename());
+            FileLine* const prefl = new FileLine{FileLine::builtInFilename()};
             s_preprocp->defineCmdLine(prefl, "VERILATOR", "1");  // LEAK_OK
             s_preprocp->defineCmdLine(prefl, "verilator", "1");  // LEAK_OK
             s_preprocp->defineCmdLine(prefl, "verilator3", "1");  // LEAK_OK
@@ -161,7 +161,7 @@ void V3PreShell::preprocInclude(FileLine* fl, const string& modname) {
     V3PreShellImp::s_preImp.preprocInclude(fl, modname);
 }
 void V3PreShell::defineCmdLine(const string& name, const string& value) {
-    FileLine* const prefl = new FileLine(FileLine::commandLineFilename());
+    FileLine* const prefl = new FileLine{FileLine::commandLineFilename()};
     V3PreShellImp::s_preprocp->defineCmdLine(prefl, name, value);
 }
 void V3PreShell::undef(const string& name) { V3PreShellImp::s_preprocp->undef(name); }
diff --git a/src/V3Scoreboard.cpp b/src/V3Scoreboard.cpp
index d21422a81..b46aee6fb 100644
--- a/src/V3Scoreboard.cpp
+++ b/src/V3Scoreboard.cpp
@@ -58,9 +58,9 @@ void V3ScoreboardBase::selfTest() {
 
     UASSERT(!sb.needsRescore(), "SelfTest: Empty sb should not need rescore.");
 
-    ScoreboardTestElem e1(10);
-    ScoreboardTestElem e2(20);
-    ScoreboardTestElem e3(30);
+    ScoreboardTestElem e1{10};
+    ScoreboardTestElem e2{20};
+    ScoreboardTestElem e3{30};
 
     sb.add(&e1);
     sb.add(&e2);
diff --git a/src/V3String.cpp b/src/V3String.cpp
index af6122e7d..4b1f2f7f6 100644
--- a/src/V3String.cpp
+++ b/src/V3String.cpp
@@ -263,7 +263,7 @@ void VHashSha256::insert(const void* datap, size_t length) {
         // If there are large inserts it would be more efficient to avoid this copy
         // by copying bytes in the loop below from either m_remainder or the data
         // as appropriate.
-        tempData = m_remainder + string(static_cast<const char*>(datap), length);
+        tempData = m_remainder + std::string{static_cast<const char*>(datap), length};
         chunkLen = tempData.length();
         chunkp = reinterpret_cast<const uint8_t*>(tempData.data());
     }
@@ -286,7 +286,7 @@ void VHashSha256::insert(const void* datap, size_t length) {
         sha256Block(m_inthash, w);
     }
 
-    m_remainder = string(reinterpret_cast<const char*>(chunkp + posBegin), chunkLen - posEnd);
+    m_remainder = std::string(reinterpret_cast<const char*>(chunkp + posBegin), chunkLen - posEnd);
 }
 
 void VHashSha256::finalize() {
@@ -426,7 +426,7 @@ string VName::dehash(const string& in) {
         const auto begin_vhsh
             = std::search(search_begin, search_end, std::begin(VHSH), std::end(VHSH) - 1);
         if (begin_vhsh != search_end) {
-            const std::string vhsh(begin_vhsh, search_end);
+            const std::string vhsh{begin_vhsh, search_end};
             const auto& it = s_dehashMap.find(vhsh);
             UASSERT(it != s_dehashMap.end(), "String not in reverse hash map '" << vhsh << "'");
             // Is this not the first component, but the first to require dehashing?
@@ -435,13 +435,13 @@ string VName::dehash(const string& in) {
                 dehashed = in.substr(0, last_dot_pos);
             }
             // Append the unhashed part of the component.
-            dehashed += std::string(search_begin, begin_vhsh);
+            dehashed += std::string{search_begin, begin_vhsh};
             // Append the bit that was lost to truncation but retrieved from the dehash map.
             dehashed += it->second;
         }
         // This component doesn't need dehashing but a previous one might have.
         else if (!dehashed.empty()) {
-            dehashed += std::string(search_begin, search_end);
+            dehashed += std::string{search_begin, search_end};
         }
 
         if (next_dot_pos != string::npos) {
diff --git a/src/V3Subst.cpp b/src/V3Subst.cpp
index 60a664786..4df63e5c8 100644
--- a/src/V3Subst.cpp
+++ b/src/V3Subst.cpp
@@ -238,7 +238,7 @@ private:
     // METHODS
     SubstVarEntry* getEntryp(AstVarRef* nodep) {
         if (!nodep->varp()->user1p()) {
-            SubstVarEntry* const entryp = new SubstVarEntry(nodep->varp());
+            SubstVarEntry* const entryp = new SubstVarEntry{nodep->varp()};
             m_entryps.push_back(entryp);
             nodep->varp()->user1p(entryp);
             return entryp;
@@ -290,7 +290,7 @@ private:
         if (debug() > 5) nodep->dumpTree(cout, "  substw_old: ");
         AstNode* newp = substp->cloneTree(true);
         if (!nodep->isQuad() && newp->isQuad()) {
-            newp = new AstCCast(newp->fileline(), newp, nodep);
+            newp = new AstCCast{newp->fileline(), newp, nodep};
         }
         if (debug() > 5) newp->dumpTree(cout, "       w_new: ");
         nodep->replaceWith(newp);
diff --git a/src/V3TSP.cpp b/src/V3TSP.cpp
index 0e488ca45..522856da2 100644
--- a/src/V3TSP.cpp
+++ b/src/V3TSP.cpp
@@ -90,7 +90,7 @@ public:
     void addVertex(const T_Key& key) {
         const auto itr = m_vertices.find(key);
         UASSERT(itr == m_vertices.end(), "Vertex already exists with same key");
-        Vertex* v = new Vertex(this, key);
+        Vertex* v = new Vertex{this, key};
         m_vertices[key] = v;
     }
 
@@ -118,8 +118,8 @@ public:
         // which uniquely identifies a single bidir edge. Luckily we
         // can do both efficiently.
         const uint64_t userValue = (static_cast<uint64_t>(cost) << 32) | edgeId;
-        (new V3GraphEdge(this, fp, tp, cost))->user(userValue);
-        (new V3GraphEdge(this, tp, fp, cost))->user(userValue);
+        (new V3GraphEdge{this, fp, tp, cost})->user(userValue);
+        (new V3GraphEdge{this, tp, fp, cost})->user(userValue);
     }
 
     static uint32_t getEdgeId(const V3GraphEdge* edgep) {
@@ -581,11 +581,11 @@ void V3TSP::selfTestStates() {
     // Linear test -- coords all along the x-axis
     {
         V3TSP::StateVec states;
-        const TspTestState s10(10, 0);
-        const TspTestState s60(60, 0);
-        const TspTestState s20(20, 0);
-        const TspTestState s100(100, 0);
-        const TspTestState s5(5, 0);
+        const TspTestState s10{10, 0};
+        const TspTestState s60{60, 0};
+        const TspTestState s20{20, 0};
+        const TspTestState s100{100, 0};
+        const TspTestState s5{5, 0};
         states.push_back(&s10);
         states.push_back(&s60);
         states.push_back(&s20);
@@ -615,13 +615,13 @@ void V3TSP::selfTestStates() {
     // Test that tspSort() will rotate the list for minimum cost.
     {
         V3TSP::StateVec states;
-        const TspTestState a(0, 0);
-        const TspTestState b(100, 0);
-        const TspTestState c(200, 0);
-        const TspTestState d(200, 100);
-        const TspTestState e(150, 150);
-        const TspTestState f(0, 150);
-        const TspTestState g(0, 100);
+        const TspTestState a{0, 0};
+        const TspTestState b{100, 0};
+        const TspTestState c{200, 0};
+        const TspTestState d{200, 100};
+        const TspTestState e{150, 150};
+        const TspTestState f{0, 150};
+        const TspTestState g{0, 100};
 
         states.push_back(&a);
         states.push_back(&b);
diff --git a/src/V3Undriven.cpp b/src/V3Undriven.cpp
index c2a757a9b..2a2b2943d 100644
--- a/src/V3Undriven.cpp
+++ b/src/V3Undriven.cpp
@@ -267,7 +267,7 @@ private:
 
     UndrivenVarEntry* getEntryp(AstVar* nodep, int which_user) {
         if (!(which_user == 1 ? nodep->user1p() : nodep->user2p())) {
-            UndrivenVarEntry* const entryp = new UndrivenVarEntry(nodep);
+            UndrivenVarEntry* const entryp = new UndrivenVarEntry{nodep};
             // UINFO(9," Associate u="<<which_user<<" "<<cvtToHex(this)<<" "<<nodep->name()<<endl);
             m_entryps[which_user].push_back(entryp);
             if (which_user == 1) {