Background: I have a large serde_json value that I want to be read-only (the authoritative source is an encrypted SQLite DB and should only be updated when that gets updated)
The issue, I would like a single get function that returns a generic type
use serde_json;
pub struct Configuration {
config: serde_json::Value,
}
impl Configuration {
async fn get(&self, key: &str) -> Result {
let tmp_value: = &self.config["test"];
// This would be repeated for String, bool, etc
if tmp_value.is_i64() {
match tmp_value.as_i64 {
Some(x) => Ok(x),
Err(e) => Err(()),
}
} else {
Err(())
}
}
}
However I get:
"mismatched types expected type parameter T found type i64"
Is it even possible to return multiple types from a single function?
EDIT: SOLUTION
Here is the solution I came up with:
pub struct Configuration {}
impl Configuration {
fn get std::str::FromStr>() -> Result {
Ok(T::from_str("1234");
}
}
fn main() {
let my_conf_val = Configuration::get();
}
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