Struct rustlr::zc_parser::StackedItem

source · [−]

pub struct StackedItem<AT: Default> {
    pub value: AT,
    pub line: usize,
    pub column: usize,
    /* private fields */
}

Expand description

these structures are what’s on the parse stack. When writing a grammar rule such as E --> E:a + E:b, the variables a and b will be bound to values of this type, and thus inside the semantic actions one would need to use a.value to extract the value, which is of the declared ‘absyntype’ of the grammar. Alternatively, one can use a pattern: E:@a@ + E:@b@ to bind a and b directly to the values.

Fields

value: ATline: usizecolumn: usize

Implementations

impl<AT: Default> StackedItem<AT>

pub fn new(si: usize, value: AT, line: usize, column: usize) -> StackedItem<AT>

pub fn lbox(self) -> LBox<AT>

converts the information in a stacked item to an LBox enclosing the abstract syntax value along with starting line and column numbers

Auto Trait Implementations

impl<AT> RefUnwindSafe for StackedItem<AT> where
AT: RefUnwindSafe,

impl<AT> Send for StackedItem<AT> where
AT: Send,

impl<AT> Sync for StackedItem<AT> where
AT: Sync,

impl<AT> Unpin for StackedItem<AT> where
AT: Unpin,

impl<AT> UnwindSafe for StackedItem<AT> where
AT: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.