ARCHIVE/xahaud
3
0
Fork 0
mirror of https://github.com/Xahau/xahaud.git synced 2025-12-06 17:27:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Replace for_each_arg trick with fold expressions

Browse Source
This commit is contained in:
seelabs
2019-08-06 08:39:52 -07:00
parent b9e73b4852
commit 4076b6d92e
2 changed files with 9 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/ripple/app/tx/impl/ApplyContext.cpp
View File

@@ -103,17 +103,16 @@ ApplyContext::checkInvariantsHelper(
std::shared_ptr <SLE const> const& before,
std::shared_ptr <SLE const> const& after)
{
// Sean Parent for_each_argument trick
(void)std::array<int, sizeof...(Is)>{
{((std::get<Is>(checkers).
visitEntry(index, isDelete, before, after)), 0)...}
};
(..., std::get<Is>(checkers).visitEntry(index, isDelete, before, after));
});
// Sean Parent for_each_argument trick (a fold expression with `&&`
// would be really nice here when we move to C++-17)
std::array<bool, sizeof...(Is)> finalizers {{
std::get<Is>(checkers).finalize(tx, result, fee, journal)...}};
// Note: do not replace this logic with a `...&&` fold expression.
// The fold expression will only run until the first check fails (it
// short-circuits). While the logic is still correct, the log
// message won't be. Every failed invariant should write to the log,
// not just the first one.
std::array<bool, sizeof...(Is)> finalizers{
{std::get<Is>(checkers).finalize(tx, result, fee, journal)...}};
// call each check's finalizer to see that it passes
if (! std::all_of( finalizers.cbegin(), finalizers.cend(),

5
src/test/csf/collectors.h
View File

@@ -70,10 +70,7 @@ class Collectors
E e,
std::index_sequence<Is...>)
{
// Sean Parent for_each_argument trick (C++ fold expressions would be
// nice here)
(void)std::array<int, sizeof...(Cs)>{
{((apply(std::get<Is>(cs), who, when, e)), 0)...}};
(..., apply(std::get<Is>(cs), who, when, e));
}
public: