Trait late_format::LateFormat

pub trait LateFormat {
    // Required method
    fn late_format(&self, arguments: HashMap<String, String>) -> String;
}

The LateFormat trait allows substituting string parameters of arbitrary name that is computed at runtime.

LateFormat is implemented for the String and &str types by default.

The substitution syntax accepts curly braces forms:

{param_name}     # parameter to replace
{"escaped"}      # escaped sequence

Syntax description:

• Whitespace is allowed around the parameter name or escaped form, such as { "foo" } versus {"foo"}.
• {param_name} expands to either an argument given in the map (whose key string is param_name) or the string None if not present. The parameter name may contain any of the following characters:

A-Z a-z 0-9 . - _ $

• {"escaped"} expands to the string escaped. It is often used for escaping the curly braces.

Example

use late_format::LateFormat;
use maplit::hashmap;
let user_string: String = "some user string: {id}".into();
assert_eq!("some user string: x", user_string.late_format(hashmap!{"id".into() => "x".into()}));
 
// if a string contains curly braces, they must be escaped.
let escaped: String = r#"{"{"}"#.into();

Required Methods

fn late_format(&self, arguments: HashMap<String, String>) -> String

Implementations on Foreign Types

impl LateFormat for &str

fn late_format(&self, arguments: HashMap<String, String>) -> String

impl LateFormat for String

fn late_format(&self, arguments: HashMap<String, String>) -> String

Implementors