concat-in-place

Provides efficient concatenation of strings and vectors

The goal of these macros are to reduce the amount of allocations that are required when concatenating string buffers and vectors; with a macro that makes it simple to achieve in practice.

Implementation Notes

• The caller must provide a buffer for appending the slices to
• The buffer is resized to accomodate the total length of all slices given

String Concatenation

Appends any number of string slices onto a string buffer

use concat_in_place::strcat;

let domain = "domain.com";
let endpoint = "inventory/parts";
let id = "10512";

let mut url = String::new();
let slice = strcat!(&mut url, domain "/" endpoint "/" id);
assert_eq!(slice, "domain.com/inventory/parts/10512");

Implementation Notes

Technically works with any string type that has the following methods:

• capacity
• len
• push_str

Vector Concatenation

Appends any number of slices onto a vector

use concat_in_place::veccat;

let domain = b"domain.com";
let endpoint = b"inventory/parts";
let id = b"10512";

let mut url = Vec::new();
let slice = veccat!(&mut url, domain b"/" endpoint b"/" id);
assert_eq!(slice, b"domain.com/inventory/parts/10512");

Implementation Notes

Technically works with any type that has the following methods:

• capacity
• len
• reserve
• extend_from_slice