How do I avoid pitfalls when moving to C++17?

Moving to C++17 can bring great improvements and modern features to your codebase, but it also introduces potential pitfalls. This guide highlights key considerations to help you transition smoothly.

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Key Considerations

  • Understanding new syntax and features such as std::optional, std::variant, and std::any.
  • Being cautious with the changes to std::string_view for improved performance.
  • Awareness of modifications in the standard library and language rules.
  • Testing your existing codebase for compatibility, as compiler behaviors may change.
  • Utilizing the new filesystem library effectively while avoiding common problems.

Example of Using std::optional

#include <iostream> #include <optional> std::optional findValue(bool found) { if (found) { return 42; } return std::nullopt; } int main() { auto value = findValue(true); if (value) { std::cout << "Value found: " << *value << std::endl; } else { std::cout << "Value not found" << std::endl; } return 0; }

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