Imports name this capability’s declared dependencies, which fune builds next to it in your project; each one links to its page.
use super::funejson::Value; ← the fune runtime: the JSON value the test vectors use; fune build keeps it only where a signature takes one
/// UTF-8 bytes back to text, strictly (RFC 3629): `String::from_utf8`
/// refuses overlong forms, encoded surrogates, code points past U+10FFFF,
/// truncated sequences and stray continuation bytes, and keeps a leading
/// byte order mark.
///
/// # Panics
/// Panics if a value is outside 0-255 or the bytes are not valid UTF-8.
pub fn utf8_decode(bytes: &[i64]) -> String {
let mut raw = Vec::with_capacity(bytes.len());
for &b in bytes {
if !(0..=255).contains(&b) {
panic!("bytes must be a list of integers from 0 to 255");
}
raw.push(b as u8);
}
match String::from_utf8(raw) {
Ok(text) => text,
Err(_) => panic!("bytes are not valid UTF-8"),
}
}
pub fn fune_vector(args: &[Value]) -> Value {
let bytes: Vec<i64> = match &args[0] {
Value::Arr(items) => items
.iter()
.map(|item| match item {
Value::Int(i) => *i,
_ => panic!("bytes must be a list of integers from 0 to 255"),
})
.collect(),
_ => panic!("bytes must be a list of integers from 0 to 255"),
};
Value::str(&utf8_decode(&bytes))
}