pub fn from_json<'segments>(
json: &str,
builder: impl Into<Builder<'segments>>,
) -> Result<()>Expand description
Decode a JSON string into a Cap’n Proto struct builder.
builder accepts anything that converts into a
capnp::dynamic_value::Builder; it must be a struct builder, since JSON
objects map to Cap’n Proto structs. The value mapping and annotations are
the same as for to_json.
Fields absent from the JSON keep whatever builder already holds, and
JSON fields with no counterpart in the schema are ignored.
Returns an error if json is malformed, if the top-level JSON value is
not an object, or if any field’s value cannot be coerced to its declared
Cap’n Proto type. On error, builder may have been partially populated.
This is Codec::new().decode(json, builder). Read
the compatibility notes before decoding input
you do not control.
ⓘ
capnp_json::from_json(&json, root)?;