Le 04/08/2012 16:19, Brendan Eich a écrit :
David Bruant wrote:
var context =
document.getElementsByTagName('canvas')[0].getContext('2d');
// bikeshed syntax for binding destructuring, my point isn't
about syntax here
var #{beginPath: begin, moveTo, lineTo, stroke, closePath: end} =
context;
// extracted methods are bound to the context object.
The # was somewhat wanted for records, tuples, and const functions, once.
Ok. As I try to highlight each time I talk about syntax, I'm usually
more interested in having a new syntax for something than in the exact
syntax.
Syntax and ES grammar really are not my specialty. When I propose
something I make sure it's a syntax error in current engines, but that's
as far as I go.
So really, the exact syntax proposal can be thrown away if there are
better ideas or if it conflicts with something else.
For DRY, new syntax seems required. From
http://wiki.ecmascript.org/doku.php?id=strawman:bind_operator
The idea of combining the bind operator and bound destructuring is a
good one in my opinion.
Your wish to mix auto-bound and unbound method destructuring could be
met by:
var {unbound, ::bound} = object;
which could be written without destructuring, but with the bind
operator strawman, as
var unbound = object.unbound, bound = ::object.bound;
+1, if that syntax works, that's fine for me :-)
David
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