Comments (12)
+1
And according to this post: What's the difference between the “serialize” and “rustc-serialize” crates?, I recommend to use Serde and its macros to serialize/deserialize a struct to/from JSON instead of rustc-serialize.
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I can second the recommendation for Serde, although it does require rust nightly to use it.
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Note that we don't actually serialize data to JSON. We just use the ToJson
trait as a type system. Because handlebars is designed against JavaScript, whose type system isn't fully compatible with Rust. Currently, ToJson
is a good way to convert Rust types into JavaScript types.
Yes, we need a macro for users to generate their ToJson
impl easily.
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Thanks. I understand why you use Json
enum and ToJson
trait for transforming Rust type and JavaScript type now. It is little twisted for the purpose though... Macro is a better and clearer way.
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@vayn patches are always welcomed :-)
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Another possibility, when using serde at least, would be to write your own Serializer
implementation that returned a BTreeMap
of values. This would remove the need to implement ToJson
and the need for a custom macro.
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@hugoduncan I didn't look into Serde, is it easier to implement Serializer of Serde than ToJson of rustc-serialize?
Because most ToJson
implementation will be: create a map, put every field into it. Perhaps we can find some meta-programming techniques to deal with this. Not sure if Rust has something for that.
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@sunng87 The Serializer
would be something that rust-handlebars would implement. Users would then just mark structs with #[derive(Serialize)]
.
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@hugoduncan Iooked at Serde, I would like to implement a custom derive for handlebars that generates ToJson
implementation. It would be compatible with current type system, but also reduce repeated ToJson
impl.
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@hugoduncan @vayn check out tojson_macros I just made for generating default ToJson
imp.
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I'm still learning how to make a procedural macro for custom struct.
@sunng87 You're amazing! 👍
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@vayn :)
I'll close this for now. Feel free to reopen if there's any question.
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