Thanks for the use cases and clarification Rick
On Wed, Sep 7, 2011 at 5:43 PM, Brendan Eich <[email protected]> wrote: > On Sep 7, 2011, at 1:26 PM, Rick Waldron wrote: > > How, if at all, will generator function* (asterisk notation) be > symmetrically applicable to arrow function or block lamba syntax? > > > Arrows could be used to express or define (see the let and const binding > shorthands) generator functions: > > let *gen() -> yield 42; > > foo(*(a, b) -> { yield a; yield b; }); // pass a generator as a downward > funarg > > Note how * is lexed depending on parser state, akin to / in ES3+ -- if in > operator position * and / are the multiply and divide operators, if in > operand position they're special forms: * must be followed by (...) or -> or > => as part of a generator arrow; / of course would be the initial delimiter > of a regexp. > > Block-lambdas are not "just syntax" for functions, so there is no goal or > requirement that they be able to express generators, any more that they be > able to express constructors (|this| is lexical always in a block-lambda). > This is yet more win for block-lambdas over arrows in my view. > > /be > > > > References > > Generators: http://wiki.ecmascript.org/doku.php?id=harmony:generators > Arrow Functions: > http://wiki.ecmascript.org/doku.php?id=strawman:arrow_function_syntax > Block Lambda: > http://wiki.ecmascript.org/doku.php?id=strawman:block_lambda_revival > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
