The serde-json-core crate is a no_std variant of the popular serde_json crate.
It is useful to serialize and deserialize JSON data in constrained environments (embedded devices or smart contracts e.g.).
I was not able to find any straightforward example, so here you go!
We are simulating a legit no_std environment on a desktop computer, by disabling all std features and manually re-importing the system libc (with the mere purpose of logging to the terminal with POSIX printf()).
The code embeds a JSON raw string, which is deserialized to a MyJson struct. Errors are handled almost nicely.
$ cargo run --release
Output:
Successfully deserialized. pow.v: 9500000
If you want to see an error, you can change:
struct MyJson {
mails: Vec<&'static str, 4>,
to:
struct MyJson {`
mails: Vec<u8, 4>,`
("mails" is a vector of strings, not a vector of u8)
Output:
Error: INVALID TYPE.