Enum rupta::mir::path::PathSelector

pub enum PathSelector {
    Deref,
    Field(usize),
    UnionField(usize),
    Index,
    Subslice {
        from: u64,
        to: u64,
        from_end: bool,
    },
    Downcast(usize),
    Discriminant,
    Cast(usize),
}

The PathSelector denotes a de-referenced item, field, or element, or slice.

Variants

Deref

Given a path that denotes a reference, select the thing the reference points to.

Field(usize)

Select the struct field with the given index.

UnionField(usize)

Selects a particular type case from a type union. all fields of a union share common storage. As a result, writes to one field of a union can overwrite its other fields, and size of a union is determined by the size of its largest field.

Index

For each field of a union, we connect it with a union offset path. Different fields at the same position connect to the same union offset path. Therefore, when writing to one field of a union, we can update the other fields at the same offset. Index into a slice/array

Subslice

Fields

from: u64

to: u64

from_end: bool

These indices are generated by slice patterns.

If from_end is true slice[from..slice.len() - to]. Otherwise array[from..to].

Downcast(usize)

“Downcast” to a variant of an ADT. Currently, MIR only introduces this for ADTs with more than one variant. The value is the ordinal of the variant.

Discriminant

The tag used to indicate which case of an enum is used for a particular enum value.

Cast(usize)

Cast a path into another type. The most common cases are casting a transparent wrapper tyoe into its inner type or casting a type into a transparent wrapper type via pointer casting.

Trait Implementations

impl Clone for PathSelector

fn clone(&self) -> PathSelector

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PathSelector

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

Formats the value using the given formatter.

impl Hash for PathSelector

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PathSelector

fn eq(&self, other: &PathSelector) -> 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 Copy for PathSelector

impl Eq for PathSelector

impl StructuralPartialEq for PathSelector