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-rw-r--r--dhall/src/semantics/core/value_kind.rs267
1 files changed, 0 insertions, 267 deletions
diff --git a/dhall/src/semantics/core/value_kind.rs b/dhall/src/semantics/core/value_kind.rs
deleted file mode 100644
index 35b2b23..0000000
--- a/dhall/src/semantics/core/value_kind.rs
+++ /dev/null
@@ -1,267 +0,0 @@
-use std::collections::HashMap;
-
-use crate::semantics::core::value::Value;
-use crate::semantics::core::var::{AlphaLabel, AlphaVar, Shift, Subst};
-use crate::semantics::phase::{Normalized, NormalizedExpr};
-use crate::semantics::to_expr;
-use crate::syntax::{
- Builtin, Const, ExprKind, Integer, InterpolatedTextContents, Label,
- NaiveDouble, Natural,
-};
-
-/// A semantic value. Subexpressions are Values, which are partially evaluated expressions that are
-/// normalized on-demand.
-/// If you compare for equality two `ValueKind`s in WHNF, then equality will be up to
-/// alpha-equivalence (renaming of bound variables) and beta-equivalence (normalization). It will
-/// recursively normalize as needed.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub(crate) enum ValueKind {
- /// Closures
- Lam(AlphaLabel, Value, Value),
- Pi(AlphaLabel, Value, Value),
- // Invariant: in whnf, the evaluation must not be able to progress further.
- AppliedBuiltin(Builtin, Vec<Value>),
-
- Var(AlphaVar),
- Const(Const),
- BoolLit(bool),
- NaturalLit(Natural),
- IntegerLit(Integer),
- DoubleLit(NaiveDouble),
- EmptyOptionalLit(Value),
- NEOptionalLit(Value),
- // EmptyListLit(t) means `[] : List t`, not `[] : t`
- EmptyListLit(Value),
- NEListLit(Vec<Value>),
- RecordType(HashMap<Label, Value>),
- RecordLit(HashMap<Label, Value>),
- UnionType(HashMap<Label, Option<Value>>),
- UnionConstructor(Label, HashMap<Label, Option<Value>>),
- UnionLit(Label, Value, HashMap<Label, Option<Value>>),
- // Invariant: in whnf, this must not contain interpolations that are themselves TextLits, and
- // contiguous text values must be merged.
- TextLit(Vec<InterpolatedTextContents<Value>>),
- Equivalence(Value, Value),
- // Invariant: in whnf, this must not contain a value captured by one of the variants above.
- PartialExpr(ExprKind<Value, Normalized>),
-}
-
-impl ValueKind {
- pub(crate) fn into_value_with_type(self, t: Value) -> Value {
- Value::from_kind_and_type(self, t)
- }
-
- /// Converts a value back to the corresponding AST expression.
- pub(crate) fn to_expr(
- &self,
- opts: to_expr::ToExprOptions,
- ) -> NormalizedExpr {
- to_expr::kind_to_expr(self, opts)
- }
-
- pub(crate) fn normalize_mut(&mut self) {
- match self {
- ValueKind::Var(_)
- | ValueKind::Const(_)
- | ValueKind::BoolLit(_)
- | ValueKind::NaturalLit(_)
- | ValueKind::IntegerLit(_)
- | ValueKind::DoubleLit(_) => {}
-
- ValueKind::EmptyOptionalLit(tth) | ValueKind::EmptyListLit(tth) => {
- tth.normalize_mut();
- }
-
- ValueKind::NEOptionalLit(th) => {
- th.normalize_mut();
- }
- ValueKind::Lam(_, t, e) => {
- t.normalize_mut();
- e.normalize_mut();
- }
- ValueKind::Pi(_, t, e) => {
- t.normalize_mut();
- e.normalize_mut();
- }
- ValueKind::AppliedBuiltin(_, args) => {
- for x in args.iter_mut() {
- x.normalize_mut();
- }
- }
- ValueKind::NEListLit(elts) => {
- for x in elts.iter_mut() {
- x.normalize_mut();
- }
- }
- ValueKind::RecordLit(kvs) => {
- for x in kvs.values_mut() {
- x.normalize_mut();
- }
- }
- ValueKind::RecordType(kvs) => {
- for x in kvs.values_mut() {
- x.normalize_mut();
- }
- }
- ValueKind::UnionType(kts) | ValueKind::UnionConstructor(_, kts) => {
- for x in kts.values_mut().flat_map(|opt| opt) {
- x.normalize_mut();
- }
- }
- ValueKind::UnionLit(_, v, kts) => {
- v.normalize_mut();
- for x in kts.values_mut().flat_map(|opt| opt) {
- x.normalize_mut();
- }
- }
- ValueKind::TextLit(elts) => {
- for x in elts.iter_mut() {
- x.map_mut(Value::normalize_mut);
- }
- }
- ValueKind::Equivalence(x, y) => {
- x.normalize_mut();
- y.normalize_mut();
- }
- ValueKind::PartialExpr(e) => {
- e.map_mut(Value::normalize_mut);
- }
- }
- }
-
- pub(crate) fn from_builtin(b: Builtin) -> ValueKind {
- ValueKind::AppliedBuiltin(b, vec![])
- }
-}
-
-impl Shift for ValueKind {
- fn shift(&self, delta: isize, var: &AlphaVar) -> Option<Self> {
- Some(match self {
- ValueKind::Lam(x, t, e) => ValueKind::Lam(
- x.clone(),
- t.shift(delta, var)?,
- e.shift(delta, &var.under_binder(x))?,
- ),
- ValueKind::AppliedBuiltin(b, args) => {
- ValueKind::AppliedBuiltin(*b, args.shift(delta, var)?)
- }
- ValueKind::Pi(x, t, e) => ValueKind::Pi(
- x.clone(),
- t.shift(delta, var)?,
- e.shift(delta, &var.under_binder(x))?,
- ),
- ValueKind::Var(v) => ValueKind::Var(v.shift(delta, var)?),
- ValueKind::Const(c) => ValueKind::Const(*c),
- ValueKind::BoolLit(b) => ValueKind::BoolLit(*b),
- ValueKind::NaturalLit(n) => ValueKind::NaturalLit(*n),
- ValueKind::IntegerLit(n) => ValueKind::IntegerLit(*n),
- ValueKind::DoubleLit(n) => ValueKind::DoubleLit(*n),
- ValueKind::EmptyOptionalLit(tth) => {
- ValueKind::EmptyOptionalLit(tth.shift(delta, var)?)
- }
- ValueKind::NEOptionalLit(th) => {
- ValueKind::NEOptionalLit(th.shift(delta, var)?)
- }
- ValueKind::EmptyListLit(tth) => {
- ValueKind::EmptyListLit(tth.shift(delta, var)?)
- }
- ValueKind::NEListLit(elts) => {
- ValueKind::NEListLit(elts.shift(delta, var)?)
- }
- ValueKind::RecordLit(kvs) => {
- ValueKind::RecordLit(kvs.shift(delta, var)?)
- }
- ValueKind::RecordType(kvs) => {
- ValueKind::RecordType(kvs.shift(delta, var)?)
- }
- ValueKind::UnionType(kts) => {
- ValueKind::UnionType(kts.shift(delta, var)?)
- }
- ValueKind::UnionConstructor(x, kts) => {
- ValueKind::UnionConstructor(x.clone(), kts.shift(delta, var)?)
- }
- ValueKind::UnionLit(x, v, kts) => ValueKind::UnionLit(
- x.clone(),
- v.shift(delta, var)?,
- kts.shift(delta, var)?,
- ),
- ValueKind::TextLit(elts) => {
- ValueKind::TextLit(elts.shift(delta, var)?)
- }
- ValueKind::Equivalence(x, y) => ValueKind::Equivalence(
- x.shift(delta, var)?,
- y.shift(delta, var)?,
- ),
- ValueKind::PartialExpr(e) => {
- ValueKind::PartialExpr(e.shift(delta, var)?)
- }
- })
- }
-}
-
-impl Subst<Value> for ValueKind {
- fn subst_shift(&self, var: &AlphaVar, val: &Value) -> Self {
- match self {
- ValueKind::AppliedBuiltin(b, args) => {
- ValueKind::AppliedBuiltin(*b, args.subst_shift(var, val))
- }
- ValueKind::PartialExpr(e) => {
- ValueKind::PartialExpr(e.subst_shift(var, val))
- }
- ValueKind::TextLit(elts) => {
- ValueKind::TextLit(elts.subst_shift(var, val))
- }
- ValueKind::Lam(x, t, e) => ValueKind::Lam(
- x.clone(),
- t.subst_shift(var, val),
- e.subst_shift(&var.under_binder(x), &val.under_binder(x)),
- ),
- ValueKind::Pi(x, t, e) => ValueKind::Pi(
- x.clone(),
- t.subst_shift(var, val),
- e.subst_shift(&var.under_binder(x), &val.under_binder(x)),
- ),
- ValueKind::Var(v) if v == var => val.to_whnf_ignore_type(),
- ValueKind::Var(v) => ValueKind::Var(v.shift(-1, var).unwrap()),
- ValueKind::Const(c) => ValueKind::Const(*c),
- ValueKind::BoolLit(b) => ValueKind::BoolLit(*b),
- ValueKind::NaturalLit(n) => ValueKind::NaturalLit(*n),
- ValueKind::IntegerLit(n) => ValueKind::IntegerLit(*n),
- ValueKind::DoubleLit(n) => ValueKind::DoubleLit(*n),
- ValueKind::EmptyOptionalLit(tth) => {
- ValueKind::EmptyOptionalLit(tth.subst_shift(var, val))
- }
- ValueKind::NEOptionalLit(th) => {
- ValueKind::NEOptionalLit(th.subst_shift(var, val))
- }
- ValueKind::EmptyListLit(tth) => {
- ValueKind::EmptyListLit(tth.subst_shift(var, val))
- }
- ValueKind::NEListLit(elts) => {
- ValueKind::NEListLit(elts.subst_shift(var, val))
- }
- ValueKind::RecordLit(kvs) => {
- ValueKind::RecordLit(kvs.subst_shift(var, val))
- }
- ValueKind::RecordType(kvs) => {
- ValueKind::RecordType(kvs.subst_shift(var, val))
- }
- ValueKind::UnionType(kts) => {
- ValueKind::UnionType(kts.subst_shift(var, val))
- }
- ValueKind::UnionConstructor(x, kts) => ValueKind::UnionConstructor(
- x.clone(),
- kts.subst_shift(var, val),
- ),
- ValueKind::UnionLit(x, v, kts) => ValueKind::UnionLit(
- x.clone(),
- v.subst_shift(var, val),
- kts.subst_shift(var, val),
- ),
- ValueKind::Equivalence(x, y) => ValueKind::Equivalence(
- x.subst_shift(var, val),
- y.subst_shift(var, val),
- ),
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 20:31:30 +0000