Function interpolator::format

pub fn format<K: Borrow<str> + Eq + Hash>(
    format: &str,
    context: &HashMap<K, Formattable<'_>>
) -> Result<String, Error>

Runtime version of format!.

Takes a string and a context, containing Formattable values, returns a string.

use interpolator::{format, Formattable};

let formatted = format(
    "{value:+05}", // could be dynamic
    &[("value", Formattable::display(&12))].into_iter().collect(),
)
.unwrap();

assert_eq!(formatted, format!("{:+05}", 12));

Errors

It will return an error if the specified format string has invalid syntax, the type doesn’t implement the expected trait, or the formatting itself failed.

For more details have a look at Error and ParseError.