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std.typecons.RefCounted/refCounted
- multiple declarations
Function refCounted
Like safeRefCounted
but used to initialize RefCounted
instead. Intended for backwards compatibility, otherwise it is preferable
to use safeRefCounted
.
Example
static struct File
{
static size_t nDestroyed;
string name;
@disable this(this); // not copyable
~this() { name = null; ++nDestroyed; }
}
auto file = File("name");
writeln(file .name); // "name"
static assert(!__traits(compiles, {auto file2 = file;}));
writeln(File .nDestroyed); // 0
{
import std .algorithm .mutation : move;
auto rcFile = refCounted(move(file));
writeln(rcFile .name); // "name"
writeln(File .nDestroyed); // 1
writeln(file .name); // null
auto rcFile2 = rcFile;
writeln(rcFile .refCountedStore .refCount); // 2
writeln(File .nDestroyed); // 1
}
writeln(File .nDestroyed); // 2
Struct RefCounted
The old version of SafeRefCounted
, before borrow
existed.
Old code may be relying on @safe
ty of some of the member functions which
cannot be safe in the new scheme, and
can avoid breakage by continuing to use this. SafeRefCounted
should be
preferred, as this type is outdated and unrecommended for new code.
Example
auto rc1 = RefCounted!int(5);
writeln(rc1); // 5
auto rc2 = rc1;
rc2 = 42;
writeln(rc1); // 42
Authors
Andrei Alexandrescu, Bartosz Milewski, Don Clugston, Shin Fujishiro, Kenji Hara
License
Copyright © 1999-2024 by the D Language Foundation | Page generated by ddox.