Struct gf::ai::state::VarState

pub struct VarState<T: Clone + Eq> { /* fields omitted */ }

🟢 Map-like structure for maintaining abstract state of variables.

Internally, this is a thin adapter over a HashLattice where keys are Vars.

Implementations

impl<T: Clone + Eq> VarState<T>

pub fn clear(&mut self)

Clear variable state to all default (⊥ or ⊤) values.

pub fn get(&self, var: Var) -> &T

Return variable state.

pub fn get_vec(&self, vars: &[Var]) -> Vec<T>

Return a vector of cloned variable states.

pub fn take(&mut self, var: Var) -> T

Return variable state leaving the default (⊥ or ⊤) value in its place.

pub fn set(&mut self, var: Var, state: T)

Set variable state.

pub fn copy(&mut self, source_var: Var, target_var: Var)

Copy state from source_var to target_var.

pub fn edge<D: Direction>(&mut self, edge: Edge<'_>)

Propagate state across an intraprocedural edge.

This method is a drop-in implementation for Interp::edge, or a part thereof.

pub fn call<D: Direction>(&self, stmt: Stmt<'_, Call>) -> Self

Propagate state across a CALL statement.

This method is a drop-in implementation for Interp::call.

pub fn call_ret<D: Direction>(
    &mut self,
    callee_state: Self,
    stmt: Stmt<'_, Call>
)

Propagate state across a return from a CALL statement.

This method is a drop-in implementation for [Interp::call_ret].

pub fn mix<D: Direction>(&mut self, stmt: Stmt<'_, Mix>)

Propagate state across a MIX statement.

This method is a drop-in implementation for Interp::mix.

Trait Implementations

impl<T: Clone + Eq + Bottom> Bottom for VarState<T>

fn bottom() -> Self

Return the bottom element, ⊥.

fn is_bottom(&self) -> bool

Test whether self is ⊥.

fn to_option(self) -> Option<Self>

Convert ⊥ to None and all other elements to Some.

fn reset_to_bottom(&mut self)

Reset self to ⊥.

impl<T: Clone + Eq> Clone for VarState<T>

fn clone(&self) -> VarState<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Clone + Eq> Debug for VarState<T>

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

Formats the value using the given formatter.

impl<T: Eq + Clone> Eq for VarState<T>

impl<T: Clone + Eq + Join> Join for VarState<T>

fn join(a: &Self, b: &Self) -> Self

Return a ⊔ b.

fn join_cmp(a: &Self, b: &Self) -> Option<Ordering>

Compare a and b using the induced partial order ⊑.

impl<T: Clone + Eq + Meet> Meet for VarState<T>

fn meet(a: &Self, b: &Self) -> Self

Return a ⊓ b.

fn meet_cmp(a: &Self, b: &Self) -> Option<Ordering>

Compare a and b using the induced partial order ⊑.

impl<T: PartialEq + Clone + Eq> PartialEq<VarState<T>> for VarState<T>

fn eq(&self, other: &VarState<T>) -> bool

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

fn ne(&self, other: &VarState<T>) -> bool

This method tests for !=.

impl<T: Clone + Eq> StructuralEq for VarState<T>

impl<T: Clone + Eq> StructuralPartialEq for VarState<T>

impl<T: Clone + Eq + Top> Top for VarState<T>

fn top() -> Self

Return the top element, ⊤.

fn is_top(&self) -> bool

Test whether self is ⊤.

fn reset_to_top(&mut self)

Reset self to ⊤.