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🟢 Approval recommended
The documentation-only changes leave two minor precision corrections, with no blocking issues.
2 open issues
What changed in this PR
Expands Chapter 12’s C/C++ interoperability guidance through C++26 while preserving the C++20 build baseline.
Changes:
- Explains ABI boundaries, ownership, callbacks, and language differences.
- Adds guidance on modules, reflection, and production interfaces.
- Numbers body sections for chapter-validator compatibility.
| File | Description |
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01_low_level/12_c_cpp/README.md |
Expands interoperability explanations and updates chapter structure. |
Review effort: Balanced
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| ### Function pointers and callbacks need a deliberate lifetime protocol | ||
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| A C callback typically consists of a function pointer plus a context pointer. A capturing C++ lambda cannot implicitly become a C function pointer; a noncapturing lambda can convert to a pointer to function with appropriate language linkage behavior as specified, but binary interfaces still require a compatible function-pointer contract. |
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| ### C99 VLAs and compound literals are not ordinary C++ syntax | ||
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| A C variable-length array has runtime size and stack-storage semantics; standard C++ does not provide C99 VLAs. Some GCC and Clang C++ modes accept them as extensions, which can accidentally turn portable-looking code into vendor-specific code. |
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Reviewed the six mixed C/C++ example groups and expanded language-vs-ABI differences, C linkage, callbacks, allocation, structs, type qualifiers, C99 VLAs/restrict, C11 atomics, C23 vs C++23, C++20 modules and C++26 reflection. Updated numbered Markdown chapter structure for chapter validator in PR #15. README-only, C++20 build baseline unchanged.