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pub fn parse<D, R>(value: D) -> Result<R, String>
where
D: serde::Serialize,
for<'r> R: serde::Deserialize<'r>,
{
match serde_json::to_value(&value) {
Ok(v) => {
let document: R = match serde_json::from_value(v) {
Ok(data) => data,
Err(e) => return Err(e.to_string()),
};
Ok(document)
}
Err(e) => return Err(e.to_string()),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_parse() -> Result<(), String> {
#[derive(Debug, Deserialize, Serialize, PartialEq)]
pub struct Entry {
a: u64,
b: u64,
c: String,
}
#[derive(Debug, Deserialize, Serialize, PartialEq)]
pub struct Document {
a: u64,
b: u64,
c: String,
}
let entry = Entry {
a: 24,
b: 42,
c: "nice".to_string(),
};
assert_eq!(
parse::<Entry, Document>(entry)?,
Document {
a: 24,
b: 42,
c: "nice".to_string(),
}
);
Ok(())
}
}