Make the Short JsonValue optional (and ideally just make JsonValue::String use a string pool for small sizes?) #10
Description
i was using the json crate to write a json-ld processor, and hit the problem of it spilling JsonValue::Sort(_) on, well, short strings.
not only is this a pain, because now everywhere that i would handle strings i now need to handle sorts as well (and uses of if let JsonValue::String(str) = json.get(key) now would need to have all the code duplicated to handle else if let JsonValue::Short = json.get(key) as well (or one would need to normalize both to a variable but at that point if it's a short you're allocating to be able to handle it in a streamlined way)
and since Short is a stack array, of 30 chars, it could be a problem if too many where made, as the lib doesn't track stack size, could lead to a stack overflow.
ideally, instead of a different type, JsonValue::String could just get it's memory from a string pool instead, if it's a short string. this would simplify handling of the data, and avoid the possible stack overflow problem.
proposed solution: initially just add a feature flag that disables parsing into shorts all together (temporarily), then adapt JsonValue::String to use a string pool on short string and a normal allocated String on long string
initially i would open this issue on the json-rs github, but it seems dead, while this fork seems alive