Crate const_str

Compile-time string operations

MSRV: Rust 1.52.0

Examples

assert_eq!(const_str::to_lowercase!("HELLO"), "hello");

assert_eq!(const_str::to_uppercase!("hello"), "HELLO");

assert_eq!(const_str::replace!("this is old", "old", "new"), "this is new");

assert_eq!(const_str::to_str!(1_u8 + 1_u8), "2");

const PROMPT: &str = "The answer is";
const ANSWER: usize = 42;
const MESSAGE: &str = const_str::concat!(PROMPT, " ", ANSWER);

assert_eq!(MESSAGE, "The answer is 42");

feature verify-regex

use regex::Regex;
let re = const_str::verified_regex!(r"^\d{4}-\d{2}-\d{2}$");
assert!(Regex::new(re).is_ok());

const_str::regex_assert_match!(r"^\d{4}-\d{2}-\d{2}$", "2014-01-01");

feature verify-http

use http::header::HeaderName;
let name = const_str::verified_header_name!("content-md5");
assert_eq!(HeaderName::from_static(name).as_str(), "content-md5");

Macros

concat

Concatenates values into a string slice.

equal

Checks that two strings are equal.

from_utf8

Converts a byte string literal to a string literal

len

Returns the length of a string slice or a byte string

regex_assert_match

Asserts that the string literal matches the pattern.

repeat

Creates a new string slice by repeating a string slice n times.

replace

Replaces all matches of a pattern with another string slice.

to_ascii_lowercase

Returns a copy of this string where each character is mapped to its ASCII lower case equivalent.

to_ascii_uppercase

Returns a copy of this string where each character is mapped to its ASCII upper case equivalent.

to_byte_array

Converts a string slice or a byte string to a byte array.

to_camel_case

Converts a string literal to camel case.

to_char_array

Converts a string literal into an array of its characters.

to_kebab_case

Converts a string literal to kebab case.

to_lowercase

Returns the lowercase equivalent of this string literal, as a new string literal.

to_shouty_kebab_case

Converts a string literal to shouty kebab case.

to_shouty_snake_case

Converts a string literal to shouty snake case.

to_snake_case

Converts a string literal to snake case.

to_str

Converts a value to a string slice.

to_uppercase

Returns the uppercase equivalent of this string literal, as a new string literal.

verified_header_name

Returns a compile-time verified header name string literal.

verified_regex

Returns a compile-time verified regex string literal.