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* XRPLF/develop: (37 commits) test: Add null check unit test for `Oracle::aggregatePrice` (7306) ci: Patch conan recipe for Nix to be able to use on macOS (7532) ci: Run sanitizers on release builds too (7527) fix: Correct hybrid offer deletion on credential expiry (6843) ci: Make sanitizer flags lists in the profile, not a string (7449) ci: Make configurations launch on certain event types (7447) fix: Add [[maybe_unused]] to fix320Enabled for assert=OFF builds (7446) ci: Add `gh` and `file` to nix packages (7444) fix: Disable transaction invariants (7409) perf: Dispatch "hasInvalidAmount()" on type tag instead of dynamic_cast (7402) refactor: Retire fixUniversalNumber amendment (5962) test: Do not create data directory for memory databases (7323) ci: Launch upload-conan-deps on profile change (7442) fix: Fix Number comparison operator (7406) feat: Use C++ 23 standard (7431) refactor: Introduce XRPL_ASSERT_IF for amendment-gated assertions (7378) refactor: Change config section and key string literals into constants (7095) refactor: Use `std::move` and `std::string_view` where possible (7424) refactor: Use const function arguments where possible (7423) ci: Use XRPLF/actions build-multiarch-image workflow (7428) ...
Basics
Utility functions and classes.
The module xrpl/basics should contain no dependencies on other modules.
Choosing an xrpld container.
-
std::vector- For ordered containers with most insertions or erases at the end.
-
std::deque- For ordered containers with most insertions or erases at the start or end.
-
std::list- For ordered containers with inserts and erases to the middle.
- For containers with iterators stable over insert and erase.
- Generally slower and bigger than
std::vectororstd::dequeexcept for those cases.
-
std::set- For sorted containers.
-
xrpl::hash_set- Where inserts and contains need to be O(1).
- For "small" sets,
std::setmight be faster and smaller.
-
xrpl::hardened_hash_set- For data sets where the key could be manipulated by an attacker in an attempt to mount an algorithmic complexity attack: see http://en.wikipedia.org/wiki/Algorithmic_complexity_attack
The following container is deprecated
std::unordered_set- Use
xrpl::hash_setinstead, which uses a better hashing algorithm. - Or use
xrpl::hardened_hash_setto prevent algorithmic complexity attacks.