Struct stakker_log::KvToJson

pub struct KvToJson<'a> { /* private fields */ }

JSON rendering of key-value pairs

When formatted with "{}", this produces a single-line compact JSON rendering of the key-value pairs.

Implementations

impl<'a> KvToJson<'a>

pub fn new(
    kvscan: &'a dyn Fn(&mut dyn LogVisitor),
    prefix: &'static str,
    suffix: &'static str
) -> Self

Create a KvToJson ready to be formatted. The output will have commas between items, but not at the start or end. A list of key-value pairs would normally be surrounded by { and } in JSON, but since this type may be used in other contexts, e.g. to extend a JSON object, only the plain key-value pairs are output.

prefix and suffix are two strings which are output before and after the key-value pairs, but only if the list of key-value pairs is non-empty. So, for example, passing "," and "" would be suitable for extending a larger JSON object that you’re already building up. Or alternatively, passing ",\"kv\":{" and "}" would allow an optional "kv" item to be added to a larger JSON object, but only if there is key-value data.

Trait Implementations

impl<'a> Display for KvToJson<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.