biotronic · HackerTrans

6 years agodiscuss

You're right - thank you for this constructive criticism. The post was originally written as a DIP (D Improvement Proposal), and arguably suffers a little because of that.

biotronic

6 years agodiscuss

Since Cython compiles to C++, it can use C++ templates directly, without the need for creating aliases to the specific instantiations you're gonna use. As far as I understand, you'll still have to write Cython bindings, though: https://cython.readthedocs.io/en/latest/src/userguide/wrappi...

biotronic

6 years agodiscuss

Walter got a bit confused here - what he's describing is the owner/borrow system he's proposed to compete with Rust. This is unrelated to named parameters.

biotronic

6 years agodiscuss

Both your convenience function and the quotes in the type name can be removed via the use of static opDispatch:

struct FlagImpl(string name) { bool value; alias value this; }

struct Flag { alias opDispatch(string name) = FlagImpl!name; }

struct Yes { static auto opDispatch(string name)() { return FlagImpl!name(true); } }

struct No { static auto opDispatch(string name)() { return FlagImpl!name(false); } }

void fun(Flag.foo a) {} // Look ma, no quotes!

unittest { fun(Yes.foo); fun(Flag.foo(true)); }

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