diff --git a/lib/Differentiator/BaseForwardModeVisitor.cpp b/lib/Differentiator/BaseForwardModeVisitor.cpp
index 67458a065..913a1251e 100644
--- a/lib/Differentiator/BaseForwardModeVisitor.cpp
+++ b/lib/Differentiator/BaseForwardModeVisitor.cpp
@@ -1045,7 +1045,7 @@ StmtDiff BaseForwardModeVisitor::VisitDeclRefExpr(const DeclRefExpr* DRE) {
     // to the underlying struct of a lambda.
     if (clonedDRE->getDecl()->getDeclContext() != m_Sema.CurContext) {
       NestedNameSpecifier* NNS = DRE->getQualifier();
-      auto referencedDecl = cast<VarDecl>(clonedDRE->getDecl());
+      auto* referencedDecl = cast<VarDecl>(clonedDRE->getDecl());
       clonedDRE = BuildDeclRef(referencedDecl, NNS, clonedDRE->getFoundDecl());
     }
   } else
diff --git a/lib/Differentiator/ReverseModeVisitor.cpp b/lib/Differentiator/ReverseModeVisitor.cpp
index 3e589682d..928d1ac88 100644
--- a/lib/Differentiator/ReverseModeVisitor.cpp
+++ b/lib/Differentiator/ReverseModeVisitor.cpp
@@ -1507,7 +1507,7 @@ Expr* getArraySizeExpr(const ArrayType* AT, ASTContext& context,
       if (VD->getDeclContext() != m_Sema.CurContext) {
         auto* ccDRE = dyn_cast<DeclRefExpr>(clonedDRE);
         NestedNameSpecifier* NNS = DRE->getQualifier();
-        auto referencedDecl = cast<VarDecl>(ccDRE->getDecl());
+        auto* referencedDecl = cast<VarDecl>(ccDRE->getDecl());
         clonedDRE = BuildDeclRef(referencedDecl, NNS, ccDRE->getFoundDecl());
       }
       // This case happens when ref-type variables have to become function
@@ -2135,8 +2135,7 @@ Expr* getArraySizeExpr(const ArrayType* AT, ASTContext& context,
       CallArgs.insert(CallArgs.begin(), Clone(OCE->getArg(0)));
       call = CXXOperatorCallExpr::Create(
           m_Context, OCE->getOperator(), Clone(CE->getCallee()), CallArgs,
-          FD->getCallResultType(), VK_LValue, Loc,
-          CE->getFPFeaturesInEffect(LangOptions()));
+          FD->getCallResultType(), VK_LValue, Loc, FPOptions());
       return StmtDiff(call);
     }
 
diff --git a/lib/Differentiator/VisitorBase.cpp b/lib/Differentiator/VisitorBase.cpp
index 16318e1ea..47bdfd28b 100644
--- a/lib/Differentiator/VisitorBase.cpp
+++ b/lib/Differentiator/VisitorBase.cpp
@@ -258,8 +258,8 @@ namespace clad {
 
     std::reverse(NNChain.begin(), NNChain.end());
 
-    for (size_t i = 0; i < NNChain.size(); ++i) {
-      NNS = NNChain[i];
+    for (auto& n : NNChain) {
+      NNS = n;
       if (NNS->getKind() == NestedNameSpecifier::Namespace) {
         NamespaceDecl* NS = NNS->getAsNamespace();
         CSS.Extend(m_Context, NS, noLoc, noLoc);