Struct juniper::LookAheadSelection

pub struct LookAheadSelection<'a, S: 'a> { /* private fields */ }

A selection performed by a query

Implementations

impl<'a, S> LookAheadSelection<'a, S>where
    S: ScalarValue,

pub fn for_explicit_type(
    &self,
    type_name: &str
) -> ConcreteLookAheadSelection<'a, S>

Convert a eventually type independent selection into one for a concrete type

Trait Implementations

impl<'a, S: Clone + 'a> Clone for LookAheadSelection<'a, S>

fn clone(&self) -> LookAheadSelection<'a, S>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, S: Debug + 'a> Debug for LookAheadSelection<'a, S>

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

Formats the value using the given formatter.

impl<'a, S> Default for LookAheadSelection<'a, S>where
    S: ScalarValue,

fn default() -> Self

Returns the “default value” for a type.

impl<'a, S> LookAheadMethods<'a, S> for LookAheadSelection<'a, S>

fn field_name(&self) -> &'a str

Get the (potentially aliased) name of the field represented by the current selection

fn select_child(&self, name: &str) -> Option<&Self>

Get the the child selection for a given field If a child has an alias, it will only match if the alias matches name

fn arguments(&self) -> &[LookAheadArgument<'_, S>]

Get the top level arguments for the current selection

fn child_names(&self) -> Vec<&'a str>

Get the (possibly aliased) names of the top level children for the current selection

fn has_arguments(&self) -> bool

Does the current node have any arguments?

fn has_children(&self) -> bool

Does the current node have any children?

fn children(&self) -> Vec<&Self>

Get an iterator over the children for the current selection

fn has_child(&self, name: &str) -> bool

Check if a given child selection with a name exists If a child has an alias, it will only match if the alias matches name

fn argument(&self, name: &str) -> Option<&LookAheadArgument<'_, S>>

Get the top level argument with a given name from the current selection

impl<'a, S: PartialEq + 'a> PartialEq<LookAheadSelection<'a, S>> for LookAheadSelection<'a, S>

fn eq(&self, other: &LookAheadSelection<'a, S>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a, S: 'a> StructuralPartialEq for LookAheadSelection<'a, S>