Method lifetime_for

crates/wit-bindgen/src/rust.rs:379–401

(&self, info: &TypeInfo, mode: TypeMode)

    }

    fn lifetime_for(&self, info: &TypeInfo, mode: TypeMode) -> Option<&'static str> {
        if matches!(self.ownership(), Ownership::Owning) {
            return None;
        }
        let lt = match mode {
            TypeMode::AllBorrowed(s) => s,
            _ => return None,
        };
        // No lifetimes needed unless this has a list.
        if !info.has_list {
            return None;
        }
        // If two names are used then this type will have an owned and a
        // borrowed copy and the borrowed copy is being used, so it needs a
        // lifetime. Otherwise if it's only borrowed and not owned then this can
        // also use a lifetime since it's not needed in two contexts and only
        // the borrowed version of the structure was generated.
        if self.uses_two_names(info) || (info.borrowed && !info.owned) {
            Some(lt)
        } else {
            None
        }
    }

    fn typedfunc_sig(&self, func: &Function, param_mode: TypeMode) -> String {
        let mut out = "(".to_string();