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production-checklist-cpp

Production checklist

Last reviewed May 28, 2026 Content v20260528
Track mode
server_compiled
Means
Compiled runner
Reading
~1 min
Level
advanced

This lesson

This lesson teaches Production checklist: the syntax, patterns, and safety habits you need before advancing in C++.

Teams still ship Production checklist in C++ codebases—skipping it leaves gaps in debugging and code reviews.

You will apply Production checklist in contexts like: Game engines, trading systems, desktop apps, and performance-critical libraries.

Write C++ in main.cpp with int main(), click Run on server—the dev runner compiles with c++/g++ -std=c++17 -Wall and runs the binary; read template errors in stderr (LEARNING_RUNNER_ENABLED=true).

When pointers, structs, and basic control flow from intermediate lessons are familiar.

Shipping C++ means strict warnings, sanitizers, static analysis, clear ownership, and reproducible builds—not just "it compiles on my machine."

Checklist

  • -Wall -Wextra -Werror in CI
  • AddressSanitizer / UBSan in test builds
  • clang-tidy and cppcheck for modern patterns
  • Prefer smart pointers and STL over raw owning pointers
  • Pin compiler versions; use CMake or Bazel with locked dependencies
  • Fuzz parsers and network decoders where security matters

Important interview questions and answers

  1. Q: Why -Werror?
    A: Treats warnings as failures—prevents merging latent undefined behavior and lifetime bugs.
  2. Q: How reduce memory bugs?
    A: RAII, smart pointers, sanitizers, code review, and avoiding raw ownership sprawl.

Self-check

  1. What sanitizer catches use-after-free?
  2. Why pin compiler versions in release builds?

Tip: Enable -Werror in CI only after fixing existing warnings—otherwise every branch blocks immediately.

Interview prep

Why -Werror in CI?

Prevents merging code with warnings that often indicate real bugs—especially lifetime and type issues.

Sanitizers in CI?

AddressSanitizer and UBSan catch memory errors during automated tests before production.

Interview tip Lesson completion confidence

Can you explain this lesson in 30 seconds without reading notes?

Not saved yet.

Playground

Runs on the configured server runner (dev: npm run runner with LEARNING_RUNNER_ENABLED=true). Output appears below the editor.

Check yourself

Multiple choice — immediate feedback.

Discussion

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Starter discussion topics

  • clang-tidy?
  • Sanitizers CI?

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