Struct Preconditions 

pub struct Preconditions {
    pub if_match: Vec<EtagMatcher>,
    pub if_none_match: Vec<EtagMatcher>,
}

Protocol-neutral write preconditions.

Use Preconditions::none to skip all checks. Multiple matchers within a list are OR’d; the two lists are AND’d.

Fields

if_match: Vec<EtagMatcher>

If-Match-style matchers. The write proceeds only if any matcher matches the current ETag.

if_none_match: Vec<EtagMatcher>

If-None-Match-style matchers. The write proceeds only if no matcher matches the current ETag.

Implementations

impl Preconditions

pub fn none() -> Self

Returns a Preconditions value with both lists empty (no checks).