diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..56d7f64
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,24 @@
+Checks:
+  -*,
+  readability-*,
+  -readability-braces-around-statements,
+  -readability-container-size-empty,
+  -readability-else-after-return,
+  -readability-implicit-bool-conversion,
+  -readability-function-cognitive-complexity,
+  -readability-magic-numbers,
+  -readability-named-parameter,
+  -readability-qualified-auto,
+  -readability-static-accessed-through-instance,
+
+CheckOptions:
+  - { key: readability-identifier-naming.ClassCase, value: CamelCase }
+  - { key: readability-identifier-naming.ConstexprVariableCase, value: lower_case }
+  - { key: readability-identifier-naming.FunctionCase, value: lower_case }
+  - { key: readability-identifier-naming.LocalVariableIgnoredRegexp, value: "^[a-z][a-z_]+" }
+  - { key: readability-identifier-naming.NamespaceCase, value: lower_case }
+  - { key: readability-identifier-naming.PrivateMemberPrefix, value: m }
+  - { key: readability-identifier-naming.StructCase, value: lower_case }
+  - { key: readability-identifier-naming.VariableCase, value: camelBack }
+
+HeaderFilterRegex: '.*'
diff --git a/.github/workflows/static_analysis.yml b/.github/workflows/static_analysis.yml
new file mode 100644
index 0000000..d5a2e50
--- /dev/null
+++ b/.github/workflows/static_analysis.yml
@@ -0,0 +1,42 @@
+
+name: Static Analysis
+
+on: pull_request_target
+
+jobs:
+
+  static_analysis:
+
+    name: ${{ matrix.toolchain }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+
+      matrix:
+
+        toolchain:
+          - ubuntu-latest
+
+        include:
+          - toolchain: ubuntu-latest
+            os: ubuntu-latest
+            compiler: clang
+
+    steps:
+
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: Analyze
+      uses: JacobDomagala/StaticAnalysis@master
+      with:
+        clang_tidy_args: >-
+          --config-file=$GITHUB_WORKSPACE/.clang-tidy
+          --extra-arg=-I$GITHUB_WORKSPACE/include --extra-arg=-std=c++17
+        cppcheck_args: >-
+          --enable=all --inconclusive --inline-suppr
+          -i$GITHUB_WORKSPACE/test/main.cpp
+          -i$GITHUB_WORKSPACE/test/test_*.cpp
+          --suppress=missingInclude
+          --suppress='*:$GITHUB_WORKSPACE/test/doctest.hpp'
+        init_script: tools/static_analysis_setup.sh
diff --git a/include/argparse/argparse.hpp b/include/argparse/argparse.hpp
index aa5f959..2aa06fd 100644
--- a/include/argparse/argparse.hpp
+++ b/include/argparse/argparse.hpp
@@ -453,7 +453,7 @@ public:
     mUsedName = usedName;
     if (mNumArgs == 0) {
       mValues.emplace_back(mImplicitValue);
-      std::visit([](auto &aAction) { aAction({}); }, mAction);
+      std::visit([](const auto &aAction) { aAction({}); }, mAction);
       return start;
     } else if (mNumArgs <= std::distance(start, end)) {
       if (auto expected = maybe_nargs()) {
@@ -857,6 +857,9 @@ public:
 
   ArgumentParser(const ArgumentParser &other)
       : mProgramName(other.mProgramName),
+        mVersion(other.mVersion),
+        mDescription(other.mDescription),
+        mEpilog(other.mEpilog),
         mIsParsed(other.mIsParsed),
         mPositionalArguments(other.mPositionalArguments),
         mOptionalArguments(other.mOptionalArguments) {
@@ -999,39 +1002,37 @@ public:
   // Print help message
   friend auto operator<<(std::ostream &stream, const ArgumentParser &parser)
       -> std::ostream & {
-    if (auto sen = std::ostream::sentry(stream)) {
-      stream.setf(std::ios_base::left);
-      stream << "Usage: " << parser.mProgramName << " [options] ";
-      std::size_t tLongestArgumentLength = parser.get_length_of_longest_argument();
+    stream.setf(std::ios_base::left);
+    stream << "Usage: " << parser.mProgramName << " [options] ";
+    std::size_t tLongestArgumentLength = parser.get_length_of_longest_argument();
 
-      for (const auto &argument : parser.mPositionalArguments) {
-        stream << argument.mNames.front() << " ";
-      }
-      stream << "\n\n";
-
-      if (!parser.mDescription.empty())
-        stream << parser.mDescription << "\n\n";
-
-      if (!parser.mPositionalArguments.empty())
-        stream << "Positional arguments:\n";
-
-      for (const auto &mPositionalArgument : parser.mPositionalArguments) {
-        stream.width(tLongestArgumentLength);
-        stream << mPositionalArgument;
-      }
-
-      if (!parser.mOptionalArguments.empty())
-        stream << (parser.mPositionalArguments.empty() ? "" : "\n")
-               << "Optional arguments:\n";
-
-      for (const auto &mOptionalArgument : parser.mOptionalArguments) {
-        stream.width(tLongestArgumentLength);
-        stream << mOptionalArgument;
-      }
-
-      if (!parser.mEpilog.empty())
-        stream << parser.mEpilog << "\n\n";
+    for (const auto &argument : parser.mPositionalArguments) {
+      stream << argument.mNames.front() << " ";
     }
+    stream << "\n\n";
+
+    if (!parser.mDescription.empty())
+      stream << parser.mDescription << "\n\n";
+
+    if (!parser.mPositionalArguments.empty())
+      stream << "Positional arguments:\n";
+
+    for (const auto &mPositionalArgument : parser.mPositionalArguments) {
+      stream.width(tLongestArgumentLength);
+      stream << mPositionalArgument;
+    }
+
+    if (!parser.mOptionalArguments.empty())
+      stream << (parser.mPositionalArguments.empty() ? "" : "\n")
+             << "Optional arguments:\n";
+
+    for (const auto &mOptionalArgument : parser.mOptionalArguments) {
+      stream.width(tLongestArgumentLength);
+      stream << mOptionalArgument;
+    }
+
+    if (!parser.mEpilog.empty())
+      stream << parser.mEpilog << "\n\n";
 
     return stream;
   }
@@ -1046,7 +1047,7 @@ public:
   // Printing the one and only help message
   // I've stuck with a simple message format, nothing fancy.
   [[deprecated("Use cout << program; instead.  See also help().")]] std::string
-  print_help() {
+  print_help() const {
     auto out = help();
     std::cout << out.rdbuf();
     return out.str();
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3c502d9..02572a0 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -57,3 +57,10 @@ set_property(TARGET ARGPARSE PROPERTY CXX_STANDARD 17)
 
 # Set ${PROJECT_NAME} as the startup project
 set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT ARGPARSE)
+
+file(GLOB ARGPARSE_LINT_SOURCES
+    tidy-base.cpp
+)
+ADD_EXECUTABLE(ARGPARSE_LINT ${ARGPARSE_LINT_SOURCES})
+set_target_properties(ARGPARSE_LINT PROPERTIES OUTPUT_NAME tidy-base)
+set_property(TARGET ARGPARSE_LINT PROPERTY CXX_STANDARD 17)
diff --git a/test/tidy-base.cpp b/test/tidy-base.cpp
new file mode 100644
index 0000000..87b47a1
--- /dev/null
+++ b/test/tidy-base.cpp
@@ -0,0 +1,4 @@
+
+#include "argparse/argparse.hpp"
+
+int main(int argc, const char* argv[]) {}
diff --git a/tools/static_analysis_setup.sh b/tools/static_analysis_setup.sh
new file mode 100755
index 0000000..cd0dc06
--- /dev/null
+++ b/tools/static_analysis_setup.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# Change to the "test" subdir before "build" subdir is made.
+cd test