Pub use JSON crate about handlebars-rust

[sunng87]

Thanks @dbrgn ! Is this a best practice/pattern for dealing with multiple version of dependencies? I haven't used this technique in my projects. Is there any drawback for publish these crates? Is it possible to find me an example that I can follow? Thanks!

[dbrgn]

I'm not sure, but I think that's what the "pub use" feature is made for :)

I opened a similar issue in the iron project which was implemented: iron/iron#406

One of the advantages is also that a use handlebars::Json will refer to either rustc-serialize or serde, depending on the compile flags.

[sunng87]

Since serde is widely used in user applications, and requires custom derive macro to generate code. I think we cannot do this for handlebars.