Struct rustc_interface::queries::Query

pub struct Query<T> {
    result: RefCell<Option<Result<T>>>,
}

Represent the result of a query.

This result can be stolen with the take method and generated with the compute method.

Fields

result: RefCell<Option<Result<T>>>

Implementations

impl<T> Query<T>

fn compute<F: FnOnce() -> Result<T>>(&self, f: F) -> Result<&Query<T>>

pub fn take(&self) -> T

Takes ownership of the query result. Further attempts to take or peek the query result will panic unless it is generated by calling the compute method.

pub fn peek(&self) -> Ref<'_, T>

Borrows the query result using the RefCell. Panics if the result is stolen.

pub fn peek_mut(&self) -> RefMut<'_, T>

Mutably borrows the query result using the RefCell. Panics if the result is stolen.

Trait Implementations

impl<T> Default for Query<T>

fn default() -> Self

Returns the “default value” for a type.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.