As far as the compiler is concerned it is only defined once. The preprocessor strips the second const out before the compilation phase.
Let me correct my earlier statement: "Your C comparison was apples-to-oranges, #ifdef is evaluated before compilation." On Fri, Dec 20, 2013 at 1:02 PM, Andrea Giammarchi < [email protected]> wrote: > many launches --harmony by default with node, many others surf the web on > the edge. I don't want to tell anyone what to do in order to use a library, > they know experimental is experimental, and as Developer I would like to be > able to feature-detect experiments or at least know that I am in an > experimental Environment. > > Once again, this is off-topic here, but Proxy is a very good example for > this problem, so are generators in older Spidermonkey versions, so are ... > you name it, avoiding vendor prefixes for not finalized yet stuff is a hell > of a foot-gun for both specifications and developers ... maybe we don't see > this as a problem today, even if there are already concrete examples like > this, but I am sure it will come back soon. > > > On Fri, Dec 20, 2013 at 3:05 AM, Claude Pache <[email protected]>wrote: > >> >> Le 20 déc. 2013 à 08:36, Andrea Giammarchi <[email protected]> >> a écrit : >> >> > as side note: in node.js using --harmony flag ... what a developer >> should do there to understand that a partially non standard version of >> Proxy is there instead of the real one? >> > >> > Let's imagine I am a client/server library author ... just for a >> second, I'd like to grant one behaviour across platforms ... I'd love V8 to >> flag experimental features as v8Proxy instead, at least I know what I am >> dealing with!!! Don't care about multiple checks, as long as I can grant >> consistency. >> > >> > This is a concern of mine that keeps coming up ... off topic here >> > >> >> Surely not the answer you want, but as developer, I would consider the >> following actions: >> >> * Putting a prominent warning in my library doc: Do not use outdated >> builds with experimental features enabled. It would make babies cry. >> * Opening a bug against implementations, asking that builds with >> experimental features enabled must have an expiration date. It may annoy >> users, but at least, it will prevent kitten from being killed. >> >> —Claude > > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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