add YAML::Any method to_json

[icyleaf]

Add method .to_json for YAML::Any

doc = YAML.parse(%(---
        string: hello crystal
        integer: 10
        float: 1.0
        true: true
        false: false
        array:
          - item1
          - item2
        hash:
          key1: value1
          key2: value2
        empty_value:
      ))

puts doc.to_json

output:

{"string":"hello crystal","integer":10,"float":1.0,"true":true,"false":false,"array":["item1","item2"],"hash":{"key1":"value1","key2":"value2"},"empty_value":null}

Is this can be add to std method, and how about to_yaml for JSON::Any add too?

[jhass]

This place doesn't feel quite right for this kind of conversions (the when "true" and when "false") too, shouldn't YAML.parse do them?

[icyleaf]

YAML only accepts string, array and hash, see details in parser of yaml and http://www.yaml.org/spec/1.2/spec.html#id2805071

[jhass]

Then maybe we shouldn't do this at all, YAML can only emit strings so any YAML being converted JSON can only return JSON of the types that are valid in YAML. The conversion of JSON -> YAML -> JSON simply is lossy by the fact that type wise YAML is a subset of JSON.

[icyleaf]

How about rewrite a basic object for json and yaml, because many same methods both in json and yaml ?

[RX14]

Why was this closed?

[icyleaf]

agree with @jhass, i will try to think how about define a super class to json and yaml which it may be not a struct.