On 12/3/13 12:34 AM, Val Markovic wrote:
This is an interesting thread. A few points:
- "box" makes a lot more sense than "new"; as others have pointed out,
the latter maps to a different concept in C++ which makes it familiar in
the worst way.
- "Foo::init" is terrible, agreed, but "Foo::new" is less than ideal as
well. "Foo::create" might be better. Just read this aloud: "this
function news a value." What? That makes no sense. "This function
creates a value." Much better, isn't it? Point being, it should be a
verb. JavaScript does it with Object.create, so there's precedent.
- placement new might be common in Servo and browser engines, but it's
not that common in most C++. After 10 years and 200k+ LOC of C++ across
many, many different programs and paradigms I've yet to use it once.
Sure, that's just one person's experience but others seem to be echoing
the same sentiment. I'm not saying let's not have placement new, just
that we shouldn't put on an undeserved pedestal.
Rust and C++ are different. You don't use placement `new` for
`shared_ptr` in C++; however, you will use placement `new` (or `box`)
for `RC` in Rust (the equivalent). For this reason I suspect that
placement `new` will be much commoner in Rust than in C++.
Patrick
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