Feature Request: Add comparison excluding fragments

[sebsebmc]

The URL spec section on equivalence specifies an optional boolean to exclude fragments. Because there is no way to add parameters to eq this crate should include a
pub fn equal_excluding_fragment(&self, other: &Url) -> bool to allow for a spec compliant way to check for url equivalence when needing to exclude fragments.

[valenting]

I don't exclude adding a convenience function, but in the meantime you can probably use the slicing helpers:

use url::{Url, Position};

fn main() {
    let url1 = Url::parse("http://example.com/#hash1").unwrap();
    let url2 = Url::parse("http://example.com/#hash2").unwrap();
    
    assert_eq!(&url1[..Position::BeforeFragment], &url2[..Position::BeforeFragment]);
}

https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=59d14292962d05acf2962ac8b640ca5c

[sebsebmc]

Just a note, I believe to match the spec the correct version is

use url::{Url, Position};

fn main() {
    let url1 = Url::parse("http://example.com/#hash1").unwrap();
    let url2 = Url::parse("http://example.com/#hash2").unwrap();
    
    assert_eq!(&url1[..Position::AfterQuery], &url2[..Position::AfterQuery]);
}

because otherwise we keep the delimiter if one url has a fragment and if the other doesn't we are not equal.