Enum TryConstruct 

pub enum TryConstruct {
    Discard,
    UseDefault,
    Trim,
}

The three behaviours §7.3.1.2.1.12 names.

The annotation’s own parameter defaults to USE_DEFAULT, so a bare @try_construct is not an absent one: an absent annotation is DISCARD (§7.2.2.7) and a valueless one is USE_DEFAULT (§7.3.1.2.1.12). Which of the two a declaration wrote is the front end’s question; by the time it reaches here it is one of these.

Variants

Discard

The whole sample is discarded. The default when no annotation is written.

UseDefault

The member takes its default and the sample survives.

Trim

An over-long string, wstring, sequence or map is truncated to what the receiver’s type holds.

Trait Implementations

impl Clone for TryConstruct

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TryConstruct

impl Debug for TryConstruct

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TryConstruct

impl Hash for TryConstruct

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TryConstruct

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TryConstruct