Character iterator comparison

[timothee-haudebourg]

i need to compare (without regard for the case) two strings that are not UTF-8 encoded. The only access I have to the individual chars is through an iterator.

Would it be possible for this crate to expose a comparison interface between two char iterators? Something like:

/// Check the equality of two character iterators.
fn stream_eq<A: Iterator<Item=char>, B: Iterator<Item=char>>(a: A, b: B) -> bool;

/// Compare two character iterators.
fn stream_cmp<A: Iterator<Item=char>, B: Iterator<Item=char>>(a: A, b: B) -> cmp::Ordering;

[timothee-haudebourg]

In addition, it would be nice to have a similar hashing function:

/// Compute the hash of a character iterator without regard for the case.
fn stream_hash<Chars: Iterator<Item=char>, H: Hasher>(chars: Chars, h: &mut H);