dvcrn Quick Reference
| Topic | File |
|---|---|
| RAII, smart pointers, new/delete | memory.md |
| Raw pointers, references, nullptr | pointers.md |
| Rule of 3/5/0, inheritance, virtual | classes.md |
| Containers, iterators, algorithms | stl.md |
| Templates, SFINAE, concepts | templates.md |
| Threads, mutex, atomics | concurrency.md |
| C++11/14/17/20, move semantics | modern.md |
| Undefined behavior traps | ub.md |
Critical Rules
- Raw
newwithoutdeleteleaks — usestd::unique_ptrorstd::make_unique - Returning reference to local — undefined behavior, object destroyed on return
==for C-strings compares pointers — usestd::stringorstrcmp()- Signed integer overflow is UB — not wrap-around like unsigned
- Virtual destructor required in base class — otherwise derived destructor skipped
std::movedoesn't move — it casts to rvalue, enabling move semantics- Moved-from object valid but unspecified — don't use without reassigning
- Data race on non-atomic is UB — use
std::mutexorstd::atomic vector<bool>is not a real container — returns proxy, usedeque<bool>map[key]inserts default if missing — usefind()orcontains()to check- Braced init
{}prevents narrowing —int x{3.5}errors,int x(3.5)truncates - Iterator invalidation on
push_back— vector may relocate, invalidating iterators string_viewdoesn't own data — underlying string must outlive the view