     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70

    use header::{EntityTag, IF_MATCH};

    header! {
        /// `If-Match` header, defined in
        /// [RFC7232](https://tools.ietf.org/html/rfc7232#section-3.1)
        ///
        /// The `If-Match` header field makes the request method conditional on
        /// the recipient origin server either having at least one current
        /// representation of the target resource, when the field-value is "*",
        /// or having a current representation of the target resource that has an
        /// entity-tag matching a member of the list of entity-tags provided in
        /// the field-value.
        ///
        /// An origin server MUST use the strong comparison function when
        /// comparing entity-tags for `If-Match`, since the client
        /// intends this precondition to prevent the method from being applied if
        /// there have been any changes to the representation data.
        ///
        /// # ABNF
        ///
        /// ```text
        /// If-Match = "*" / 1#entity-tag
        /// ```
        ///
        /// # Example values
        ///
        /// * `"xyzzy"`
        /// * "xyzzy", "r2d2xxxx", "c3piozzzz"
        ///
        /// # Examples
        ///
        /// ```rust
        /// use actix_web::HttpResponse;
        /// use actix_web::http::header::IfMatch;
        ///
        /// let mut builder = HttpResponse::Ok();
        /// builder.set(IfMatch::Any);
        /// ```
        ///
        /// ```rust
        /// use actix_web::HttpResponse;
        /// use actix_web::http::header::{IfMatch, EntityTag};
        ///
        /// let mut builder = HttpResponse::Ok();
        /// builder.set(
        ///     IfMatch::Items(vec![
        ///         EntityTag::new(false, "xyzzy".to_owned()),
        ///         EntityTag::new(false, "foobar".to_owned()),
        ///         EntityTag::new(false, "bazquux".to_owned()),
        ///     ])
        /// );
        /// ```
        (IfMatch, IF_MATCH) => {Any / (EntityTag)+}

        test_if_match {
            test_header!(
                test1,
                vec![b"\"xyzzy\""],
                Some(HeaderField::Items(
                    vec![EntityTag::new(false, "xyzzy".to_owned())])));
            test_header!(
                test2,
                vec![b"\"xyzzy\", \"r2d2xxxx\", \"c3piozzzz\""],
                Some(HeaderField::Items(
                    vec![EntityTag::new(false, "xyzzy".to_owned()),
                         EntityTag::new(false, "r2d2xxxx".to_owned()),
                         EntityTag::new(false, "c3piozzzz".to_owned())])));
            test_header!(test3, vec![b"*"], Some(IfMatch::Any));
        }
    }

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)

Search multiple things at once by splitting your query with comma (e.g. `str,u8` or `String,struct:Vec,test`)