docs(cpp11): add STL real-world case and exercise mapping for 16-generalized-unions#57
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lczllx wants to merge 2 commits into
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docs(cpp11): add STL real-world case and exercise mapping for 16-generalized-unions#57lczllx wants to merge 2 commits into
lczllx wants to merge 2 commits into
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…ralized-unions - add section 二 真实案例 — include std::variant _Variant_storage_ and std::any _Storage_t examples, both cited from vendored msvc-stl/ - fill in 四 练习代码 — exercise descriptions, file links and d2x checker command - fix empty Code link in header table Case selection notes: Picked _Variant_storage_ over std::optional _Optional_destruct_base because the variant recursive union demonstrates both key C++11 generalized-union capabilities — non-trivial members and manual destructor management — while the optional pattern is effectively a special case of variant. std::any adds a second typical use: union as type-erased storage. Both are directly traceable in the vendored msvc-stl/, consistent with how ch00 cites xutility.
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docs(cpp11): add STL real-world case and exercise mapping for 16-generalized-unions
add section 二 真实案例 — include std::variant Variant_storage and
std::any _Storage_t examples, both cited from vendored msvc-stl/
fill in 四 练习代码 — exercise descriptions, file links and
d2x checker command
fix empty Code link in header table
Case selection notes:
Picked Variant_storage over std::optional _Optional_destruct_base
because the variant recursive union demonstrates both key C++11
generalized-union capabilities — non-trivial members and manual
destructor management — while the optional pattern is effectively
a special case of variant. std::any adds a second typical use:
union as type-erased storage. Both are directly traceable in the
vendored msvc-stl/, consistent with how ch00 cites xutility.