Function string_replace_all 

pub fn string_replace_all<'a, P: Into<Pattern<'a>>>(
    input: &str,
    pattern: P,
    replacement: &str,
) -> String

Replaces all occurrences of from with to in input, supporting both exact string and regex replacements.

This function works as follows:

• If from is a string slice (&str), it performs a simple .replace() on the input.
• If from is a regex (Regex), it applies .replace_all() to match the pattern.
• The original input string remains unchanged and a new String is returned.
• Consecutive occurrences of to are collapsed into a single instance to avoid unintended duplication.

Arguments

• input - The original string.
• from - The pattern to replace (either a string slice or a regex).
• to - The replacement string.

Returns

A new String with all occurrences replaced. Consecutive duplicates of to are merged.

Examples

use string_replace_all::string_replace_all;

let text = "Hello world! This is Rust.";
let result = string_replace_all(text, "world", "RustLang");
assert_eq!(result, "Hello RustLang! This is Rust.");

use string_replace_all::string_replace_all;

let text = "A B C D";
let result = string_replace_all(text, "B", "X");
assert_eq!(result, "A X C D"); // Spaces are properly collapsed

use string_replace_all::string_replace_all;

let text = "Some special characters like * & % !";
let result = string_replace_all(text, "*", "[STAR]");
assert_eq!(result, "Some special characters like [STAR] & % !");

use regex::Regex;
use string_replace_all::string_replace_all;

let text = "I think Ruth's dog is cuter than your dog!";
let regex = Regex::new("(?i)Dog").unwrap(); // Case-insensitive regex

let result = string_replace_all(text, &regex, "ferret");
assert_eq!(result, "I think Ruth's ferret is cuter than your ferret!");