Build and validate UTF-8 data from chunks. Each chunk doesn't have to be a complete UTF-8 data.
When we want our Rust program to input a UTF-8 data, we can store all data in the memory and use String::from_utf8(vec) to validate it and convert it into a String instance.
However, it would be better if we perform UTF-8 validation while fetching and storing the data into the memory. In such a way, if the data is not UTF-8, we don't have to waste the memory space and time to store it.
```rust use utf8_builder::Utf8Builder;
const TEXT1: &str = "is is English."; const TEXT2: &str = "這是中文。";
let mut builder = Utf8Builder::new();
builder.push(b'T').unwrap(); builder.pushchar('h').unwrap(); builder.pushstr(TEXT1).unwrap(); builder.pushchunk(TEXT2.asbytes()).unwrap();
let result = builder.finalize().unwrap();
assert_eq!(format!("Th{}{}", TEXT1, TEXT2), result); ```
Disable the default features to compile this crate without std.
toml
[dependencies.utf8-builder]
version = "*"
default-features = false
https://crates.io/crates/utf8-builder
https://docs.rs/utf8-builder