On Tue, 24 Feb 2009 15:58:18 +0300, Yigal Chripun <[email protected]>
wrote:
downs wrote:
Yigal Chripun wrote:
Lars Kyllingstad wrote:
I've always thought currying was the main point of std.bind. If I'm
not
mistaken, currying is commonly a built-in feature of functional
programming languages, so if anything, std.bind could become more
useful/important in D2 than in D1.
I agree that the std.bind API could and should be improved.
-Lars
you don't need bind for currying, it's even possible to do this in C:
int foo(int a, int b) { ... }
int bar(int a) { return foo(a, _value); } // curry with some _value
Other languages provide useful syntax sugar for currying:
auto bar2 = foo(_, 500);
bar2 here will be a delegate that will do the the same as the above
bar.
Just for comparison' sake:
auto dg =&foo /rfix/ somevar; // 1.0, tools
auto dg = _bind(&foo, _1, somevar); // 1.0, std.bind
auto dg = (int a) { return foo(a, somevar); }; // 2.0, literal
auto dg = foo(_, somevar);
So does that mean you like the above suggestion?
after all, it's shorter and clearer than all the other alternatives.. ;)
void foo(int x, int y) { ... }
void foo(float x, int y) { ... }
auto dg = foo(_, 0); // which one is picked?
