qmux 0.0.2

QMux protocol (draft-ietf-quic-qmux-00) over reliable transports
Documentation 
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use crate::Error;

/// Validate that a protocol name contains only valid HTTP token characters (tchar).
#[allow(dead_code)]
pub(crate) fn validate_protocol(protocol: &str) -> Result<(), Error> {
    if protocol.is_empty() {
        return Err(Error::InvalidProtocol(protocol.to_string()));
    }

    for c in protocol.chars() {
        if !is_tchar(c) {
            return Err(Error::InvalidProtocol(protocol.to_string()));
        }
    }

    Ok(())
}

/// Check if a character is a valid HTTP token character per RFC 7230.
fn is_tchar(c: char) -> bool {
    matches!(c,
        'a'..='z' | 'A'..='Z' | '0'..='9'
        | '!' | '#' | '$' | '%' | '&' | '\'' | '*' | '+' | '-' | '.' | '^' | '_' | '`' | '|' | '~'
    )
}