Struct flux_middle::global_env::Symbol

pub struct Symbol(SymbolIndex);

An interned string.

Internally, a Symbol is implemented as an index, and all operations (including hashing, equality, and ordering) operate on that index. The use of rustc_index::newtype_index! means that Option<Symbol> only takes up 4 bytes, because rustc_index::newtype_index! reserves the last 256 values for tagging purposes.

Note that Symbol cannot directly be a rustc_index::newtype_index! because it implements fmt::Debug, Encodable, and Decodable in special ways.

Tuple Fields

0: SymbolIndex

Trait Implementations

impl From<Symbol> for Constant

fn from(s: Symbol) -> Self

Converts to this type from the input type.

impl TypeFoldable for Symbol

fn try_fold_with<F: FallibleTypeFolder>( &self, _: &mut F, ) -> Result<Self, F::Error>

fn fold_with<F: TypeFolder>(&self, _: &mut F) -> Self

fn normalize_projections<'tcx>( &self, genv: GlobalEnv<'_, 'tcx>, infcx: &InferCtxt<'tcx>, callsite_def_id: DefId, ) -> QueryResult<Self>

fn normalize(&self, defns: &SpecFuncDefns) -> Self

Normalize expressions by applying beta reductions for tuples and lambda abstractions.

fn replace_holes( &self, f: impl FnMut(&[BoundVariableKinds], HoleKind) -> Expr, ) -> Self

Replaces all holes with the result of calling a closure. The closure takes a list with all the layers of bound variables at the point the hole was found. Each layer corresponds to the list of bound variables at that level. The list is ordered from outermost to innermost binder, i.e., the last element is the binder closest to the hole.

fn with_holes(&self) -> Self

Remove all refinements and turn each underlying BaseTy into a TyKind::Exists with a TyKind::Constr and a hole. For example, Vec<{v. i32[v] | v > 0}>[n] becomes {n. Vec<{v. i32[v] | *}>[n] | *}.

fn replace_evars(&self, evars: &EVarSol) -> Self

fn shift_in_escaping(&self, amount: u32) -> Self

fn shift_out_escaping(&self, amount: u32) -> Self

fn erase_regions(&self) -> Self

impl TypeVisitable for Symbol

fn visit_with<V: TypeVisitor>(&self, _: &mut V) -> ControlFlow<V::BreakTy>

fn has_escaping_bvars(&self) -> bool

fn has_escaping_bvars_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound vars that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound vars that appear free.

fn fvars(&self) -> FxHashSet<Name>

Returns the set of all free variables. For example, Vec<i32[n]>{v : v > m} returns {n, m}.