Enum join_impl::handler::Handler

pub enum Handler {
    Map(Expr),
    Then(Expr),
    AndThen(Expr),
}

map => expr, then => expr, and_then => expr

Variants

Map(Expr)

Then(Expr)

AndThen(Expr)

Methods

impl Handler

pub fn new(input: ParseStream) -> Result<Option<Self>>

Checks if input ParseStream next value is a Handler and then if it's true, attempts to parse it, otherwise returns None. Will return Err if ParseStream must contain Handler but it can't be parsed.

pub fn is_map(&self) -> bool

Returns true if handler is Map.

pub fn is_then(&self) -> bool

Returns true if handler is Then.

pub fn is_and_then(&self) -> bool

Returns true if handler is AndThen.

pub fn peek_handler(input: ParseStream) -> bool

Returns true if next value in input ParseStream is the definition of Handler.

pub fn extract_expr(&self) -> &Expr

Extracts inner expr.