Struct WhileLet 

pub struct WhileLet {
    pub extent: Extent,
    pub label: Option<Lifetime>,
    pub pattern: Pattern,
    pub value: Box<Attributed<Expression>>,
    pub body: Box<Block>,
    pub whitespace: Vec<Whitespace>,
}

The conditional, pattern-matching loop

Example Source

fn a() { while let Some(i) = iterator.next() {} }
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fields

extent: Extent

label: Option<Lifetime>

pattern: Pattern

value: Box<Attributed<Expression>>

body: Box<Block>

whitespace: Vec<Whitespace>

Trait Implementations

impl Debug for WhileLet

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

Formats the value using the given formatter.

impl HasExtent for WhileLet

fn extent(&self) -> Extent

impl<'a> Index<&'a WhileLet> for str

type Output = str

The returned type after indexing.

fn index(&self, i: &'a WhileLet) -> &Self::Output

Performs the indexing (container[index]) operation.

impl Index<WhileLet> for str

type Output = str

The returned type after indexing.

fn index(&self, i: WhileLet) -> &Self::Output

Performs the indexing (container[index]) operation.

impl Visit for WhileLet

fn visit<'ast, V>(&'ast self, v: &mut V)

where V: Visitor<'ast>,

fn visit_mut<V>(&mut self, v: &mut V)

where V: VisitorMut,