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core/typecheck/typedef: Add is_vararg_ctx to TTuple

This commit is contained in:
David Mak 2024-07-10 12:27:59 +08:00
parent 3dc8498202
commit 6a64c9d1de
14 changed files with 174 additions and 60 deletions
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2
nac3artiq/src/codegen.rs
View File

@ -386,7 +386,7 @@ fn gen_rpc_tag(
} else {
let ty_enum = ctx.unifier.get_ty(ty);
match &*ty_enum {
TTuple { ty } => {
TTuple { ty, is_vararg_ctx: false } => {
buffer.push(b't');
buffer.push(ty.len() as u8);
for ty in ty {

15
nac3artiq/src/symbol_resolver.rs
View File

@ -351,7 +351,7 @@ impl InnerResolver {
Ok(Ok((ndarray, false)))
} else if ty_id == self.primitive_ids.tuple {
// do not handle type var param and concrete check here
Ok(Ok((unifier.add_ty(TypeEnum::TTuple { ty: vec![] }), false)))
Ok(Ok((unifier.add_ty(TypeEnum::TTuple { ty: vec![], is_vararg_ctx: false }), false)))
} else if ty_id == self.primitive_ids.option {
Ok(Ok((primitives.option, false)))
} else if ty_id == self.primitive_ids.none {
@ -555,7 +555,10 @@ impl InnerResolver {
Err(err) => return Ok(Err(err)),
_ => return Ok(Err("tuple type needs at least 1 type parameters".to_string()))
};
Ok(Ok((unifier.add_ty(TypeEnum::TTuple { ty: args }), true)))
Ok(Ok((
unifier.add_ty(TypeEnum::TTuple { ty: args, is_vararg_ctx: false }),
true,
)))
}
TypeEnum::TObj { params, obj_id, .. } => {
let subst = {
@ -797,7 +800,9 @@ impl InnerResolver {
.map(|elem| self.get_obj_type(py, elem, unifier, defs, primitives))
.collect();
let types = types?;
Ok(types.map(|types| unifier.add_ty(TypeEnum::TTuple { ty: types })))
Ok(types.map(|types| {
unifier.add_ty(TypeEnum::TTuple { ty: types, is_vararg_ctx: false })
}))
}
// special handling for option type since its class member layout in python side
// is special and cannot be mapped directly to a nac3 type as below
@ -1203,7 +1208,9 @@ impl InnerResolver {
Ok(Some(ndarray.as_pointer_value().into()))
} else if ty_id == self.primitive_ids.tuple {
let expected_ty_enum = ctx.unifier.get_ty_immutable(expected_ty);
let TypeEnum::TTuple { ty } = expected_ty_enum.as_ref() else { unreachable!() };
let TypeEnum::TTuple { ty, is_vararg_ctx: false } = expected_ty_enum.as_ref() else {
unreachable!()
};
let tup_tys = ty.iter();
let elements: &PyTuple = obj.downcast()?;

16
nac3core/src/codegen/concrete_type.rs
View File

@ -47,6 +47,7 @@ pub enum ConcreteTypeEnum {
TPrimitive(Primitive),
TTuple {
ty: Vec<ConcreteType>,
is_vararg_ctx: bool,
},
TObj {
obj_id: DefinitionId,
@ -103,7 +104,14 @@ impl ConcreteTypeStore {
.iter()
.map(|arg| ConcreteFuncArg {
name: arg.name,
ty: self.from_unifier_type(unifier, primitives, arg.ty, cache),
ty: if arg.is_vararg {
let tuple_ty = unifier
.add_ty(TypeEnum::TTuple { ty: vec![arg.ty], is_vararg_ctx: true });
self.from_unifier_type(unifier, primitives, tuple_ty, cache)
} else {
self.from_unifier_type(unifier, primitives, arg.ty, cache)
},
default_value: arg.default_value.clone(),
is_vararg: arg.is_vararg,
})
@ -160,11 +168,12 @@ impl ConcreteTypeStore {
cache.insert(ty, None);
let ty_enum = unifier.get_ty(ty);
let result = match &*ty_enum {
TypeEnum::TTuple { ty } => ConcreteTypeEnum::TTuple {
TypeEnum::TTuple { ty, is_vararg_ctx } => ConcreteTypeEnum::TTuple {
ty: ty
.iter()
.map(|t| self.from_unifier_type(unifier, primitives, *t, cache))
.collect(),
is_vararg_ctx: *is_vararg_ctx,
},
TypeEnum::TObj { obj_id, fields, params } => ConcreteTypeEnum::TObj {
obj_id: *obj_id,
@ -250,11 +259,12 @@ impl ConcreteTypeStore {
*cache.get_mut(&cty).unwrap() = Some(ty);
return ty;
}
ConcreteTypeEnum::TTuple { ty } => TypeEnum::TTuple {
ConcreteTypeEnum::TTuple { ty, is_vararg_ctx } => TypeEnum::TTuple {
ty: ty
.iter()
.map(|cty| self.to_unifier_type(unifier, primitives, *cty, cache))
.collect(),
is_vararg_ctx: *is_vararg_ctx,
},
ConcreteTypeEnum::TVirtual { ty } => {
TypeEnum::TVirtual { ty: self.to_unifier_type(unifier, primitives, *ty, cache) }

9
nac3core/src/codegen/expr.rs
View File

@ -267,13 +267,16 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
}
Constant::Tuple(v) => {
let ty = self.unifier.get_ty(ty);
let types =
if let TypeEnum::TTuple { ty } = &*ty { ty.clone() } else { unreachable!() };
let (types, is_vararg_ctx) = if let TypeEnum::TTuple { ty, is_vararg_ctx } = &*ty {
(ty.clone(), *is_vararg_ctx)
} else {
unreachable!()
};
let values = zip(types, v.iter())
.map_while(|(ty, v)| self.gen_const(generator, v, ty))
.collect_vec();
if values.len() == v.len() {
if is_vararg_ctx || values.len() == v.len() {
let types = values.iter().map(BasicValueEnum::get_type).collect_vec();
let ty = self.ctx.struct_type(&types, false);
Some(ty.const_named_struct(&values).into())

4
nac3core/src/codegen/mod.rs
View File

@ -538,8 +538,10 @@ fn get_llvm_type<'ctx, G: CodeGenerator + ?Sized>(
};
return ty;
}
TTuple { ty } => {
TTuple { ty, is_vararg_ctx } => {
// a struct with fields in the order present in the tuple
assert!(!is_vararg_ctx, "Tuples in vararg context must be instantiated with the correct number of arguments before calling get_llvm_type");
let fields = ty
.iter()
.map(|ty| {

5
nac3core/src/codegen/stmt.rs
View File

@ -197,7 +197,7 @@ pub fn gen_assign_target_list<'ctx, G: CodeGenerator>(
};
// NOTE: Currently, RHS's type is forced to be a Tuple by the type inferencer.
let TypeEnum::TTuple { ty: tuple_tys } = &*ctx.unifier.get_ty(value_ty) else {
let TypeEnum::TTuple { ty: tuple_tys, .. } = &*ctx.unifier.get_ty(value_ty) else {
unreachable!();
};
@ -252,7 +252,8 @@ pub fn gen_assign_target_list<'ctx, G: CodeGenerator>(
ctx.builder.build_load(psub_tuple_val, "starred_target_value").unwrap();
// Create the typechecker type of the sub-tuple
let sub_tuple_ty = ctx.unifier.add_ty(TypeEnum::TTuple { ty: val_tys.to_vec() });
let sub_tuple_ty =
ctx.unifier.add_ty(TypeEnum::TTuple { ty: val_tys.to_vec(), is_vararg_ctx: false });
// Now assign with that sub-tuple to the starred target.
generator.gen_assign(ctx, target, ValueEnum::Dynamic(sub_tuple_val), sub_tuple_ty)?;

8
nac3core/src/symbol_resolver.rs
View File

@ -78,14 +78,14 @@ impl SymbolValue {
}
Constant::Tuple(t) => {
let expected_ty = unifier.get_ty(expected_ty);
let TypeEnum::TTuple { ty } = expected_ty.as_ref() else {
let TypeEnum::TTuple { ty, is_vararg_ctx } = expected_ty.as_ref() else {
return Err(format!(
"Expected {:?}, but got Tuple",
expected_ty.get_type_name()
));
};
assert_eq!(ty.len(), t.len());
assert!(*is_vararg_ctx || ty.len() == t.len());
let elems = t
.iter()
@ -155,7 +155,7 @@ impl SymbolValue {
SymbolValue::Bool(_) => primitives.bool,
SymbolValue::Tuple(vs) => {
let vs_tys = vs.iter().map(|v| v.get_type(primitives, unifier)).collect::<Vec<_>>();
unifier.add_ty(TypeEnum::TTuple { ty: vs_tys })
unifier.add_ty(TypeEnum::TTuple { ty: vs_tys, is_vararg_ctx: false })
}
SymbolValue::OptionSome(_) | SymbolValue::OptionNone => primitives.option,
}
@ -482,7 +482,7 @@ pub fn parse_type_annotation<T>(
parse_type_annotation(resolver, top_level_defs, unifier, primitives, elt)
})
.collect::<Result<Vec<_>, _>>()?;
Ok(unifier.add_ty(TypeEnum::TTuple { ty }))
Ok(unifier.add_ty(TypeEnum::TTuple { ty, is_vararg_ctx: false }))
} else {
Err(HashSet::from(["Expected multiple elements for tuple".into()]))
}

2
nac3core/src/toplevel/builtins.rs
View File

@ -2083,6 +2083,7 @@ impl<'a> BuiltinBuilder<'a> {
| PrimDef::FunSpLinalgHessenberg => {
let ret_ty = self.unifier.add_ty(TypeEnum::TTuple {
ty: vec![self.ndarray_float_2d, self.ndarray_float_2d],
is_vararg_ctx: false,
});
create_fn_by_codegen(
self.unifier,
@ -2112,6 +2113,7 @@ impl<'a> BuiltinBuilder<'a> {
PrimDef::FunNpLinalgSvd => {
let ret_ty = self.unifier.add_ty(TypeEnum::TTuple {
ty: vec![self.ndarray_float_2d, self.ndarray_float, self.ndarray_float_2d],
is_vararg_ctx: false,
});
create_fn_by_codegen(
self.unifier,

2
nac3core/src/toplevel/type_annotation.rs
View File

@ -552,7 +552,7 @@ pub fn get_type_from_type_annotation_kinds(
)
})
.collect::<Result<Vec<_>, _>>()?;
Ok(unifier.add_ty(TypeEnum::TTuple { ty: tys }))
Ok(unifier.add_ty(TypeEnum::TTuple { ty: tys, is_vararg_ctx: false }))
}
}
}

2
nac3core/src/typecheck/function_check.rs
View File

@ -223,7 +223,7 @@ impl<'a> Inferencer<'a> {
]
.iter()
.any(|allowed_ty| self.unifier.unioned(ret_ty, *allowed_ty)),
TypeEnum::TTuple { ty } => ty.iter().all(|t| self.check_return_value_ty(*t)),
TypeEnum::TTuple { ty, .. } => ty.iter().all(|t| self.check_return_value_ty(*t)),
_ => false,
}
}

7
nac3core/src/typecheck/type_error.rs
View File

@ -183,9 +183,10 @@ impl<'a> Display for DisplayTypeError<'a> {
}
result
}
(TypeEnum::TTuple { ty: ty1 }, TypeEnum::TTuple { ty: ty2 })
if ty1.len() != ty2.len() =>
{
(
TypeEnum::TTuple { ty: ty1, is_vararg_ctx: is_vararg1 },
TypeEnum::TTuple { ty: ty2, is_vararg_ctx: is_vararg2 },
) if !is_vararg1 && !is_vararg2 && ty1.len() != ty2.len() => {
let t1 = self.unifier.stringify_with_notes(*t1, &mut notes);
let t2 = self.unifier.stringify_with_notes(*t2, &mut notes);
write!(f, "Tuple length mismatch: got {t1} and {t2}")

14
nac3core/src/typecheck/type_inferencer/mod.rs
View File

@ -973,13 +973,14 @@ impl<'a> Inferencer<'a> {
]));
}
}
TypeEnum::TTuple { ty: tuple_element_types } => {
TypeEnum::TTuple { ty: tuple_element_types, .. } => {
// Handle 2. A tuple of int32s
// Typecheck
// The expected type is just the tuple but with all its elements being int32.
let expected_ty = self.unifier.add_ty(TypeEnum::TTuple {
ty: tuple_element_types.iter().map(|_| self.primitives.int32).collect_vec(),
is_vararg_ctx: false,
});
self.unifier.unify(shape_ty, expected_ty).map_err(|err| {
HashSet::from([err
@ -1714,7 +1715,7 @@ impl<'a> Inferencer<'a> {
ast::Constant::Tuple(vals) => {
let ty: Result<Vec<_>, _> =
vals.iter().map(|x| self.infer_constant(x, loc)).collect();
Ok(self.unifier.add_ty(TypeEnum::TTuple { ty: ty? }))
Ok(self.unifier.add_ty(TypeEnum::TTuple { ty: ty?, is_vararg_ctx: false }))
}
ast::Constant::Str(_) => Ok(self.primitives.str),
ast::Constant::None => {
@ -1748,7 +1749,7 @@ impl<'a> Inferencer<'a> {
#[allow(clippy::unnecessary_wraps)]
fn infer_tuple(&mut self, elts: &[ast::Expr<Option<Type>>]) -> InferenceResult {
let ty = elts.iter().map(|x| x.custom.unwrap()).collect();
Ok(self.unifier.add_ty(TypeEnum::TTuple { ty }))
Ok(self.unifier.add_ty(TypeEnum::TTuple { ty, is_vararg_ctx: false }))
}
/// Checks for non-class attributes
@ -1985,7 +1986,7 @@ impl<'a> Inferencer<'a> {
rhs_ty: Type,
) -> Result<Vec<ast::Expr<Option<Type>>>, InferenceError> {
// TODO: Allow bidirectional typechecking? Currently RHS's type has to be resolved.
let TypeEnum::TTuple { ty: rhs_tys } = &*self.unifier.get_ty(rhs_ty) else {
let TypeEnum::TTuple { ty: rhs_tys, .. } = &*self.unifier.get_ty(rhs_ty) else {
// TODO: Allow RHS AST-aware error reporting
return report_error(
"LHS target list pattern requires RHS to be a tuple type",
@ -2055,7 +2056,10 @@ impl<'a> Inferencer<'a> {
// Fold the starred target
if let ExprKind::Starred { value: target, .. } = target_starred.node {
let ty = self.unifier.add_ty(TypeEnum::TTuple { ty: rhs_tys_starred.to_vec() });
let ty = self.unifier.add_ty(TypeEnum::TTuple {
ty: rhs_tys_starred.to_vec(),
is_vararg_ctx: false,
});
let folded_target = self.fold_assign_target(*target, ty)?;
folded_targets.push(Located {
location: target_starred.location,

131
nac3core/src/typecheck/typedef/mod.rs
View File

@ -1,5 +1,6 @@
use indexmap::IndexMap;
use itertools::Itertools;
use itertools::{repeat_n, Itertools};
use nac3parser::ast::{Cmpop, Location, StrRef, Unaryop};
use std::cell::RefCell;
use std::collections::HashMap;
use std::fmt::{self, Display};
@ -8,8 +9,6 @@ use std::rc::Rc;
use std::sync::{Arc, Mutex};
use std::{borrow::Cow, collections::HashSet};
use nac3parser::ast::{Cmpop, Location, StrRef, Unaryop};
use super::magic_methods::Binop;
use super::type_error::{TypeError, TypeErrorKind};
use super::unification_table::{UnificationKey, UnificationTable};
@ -234,6 +233,12 @@ pub enum TypeEnum {
TTuple {
/// The types of elements present in this tuple.
ty: Vec<Type>,
/// Whether this tuple is used in a vararg context.
///
/// If `true`, `ty` must only contain one type, and the tuple is assumed to contain any
/// number of `ty`-typed values.
is_vararg_ctx: bool,
},
/// An object type.
@ -528,7 +533,7 @@ impl Unifier {
TypeEnum::TVirtual { ty } => self.get_instantiations(*ty).map(|ty| {
ty.iter().map(|&ty| self.add_ty(TypeEnum::TVirtual { ty })).collect_vec()
}),
TypeEnum::TTuple { ty } => {
TypeEnum::TTuple { ty, is_vararg_ctx } => {
let tuples = ty
.iter()
.map(|ty| self.get_instantiations(*ty).unwrap_or_else(|| vec![*ty]))
@ -538,7 +543,12 @@ impl Unifier {
None
} else {
Some(
tuples.into_iter().map(|ty| self.add_ty(TypeEnum::TTuple { ty })).collect(),
tuples
.into_iter()
.map(|ty| {
self.add_ty(TypeEnum::TTuple { ty, is_vararg_ctx: *is_vararg_ctx })
})
.collect(),
)
}
}
@ -582,7 +592,7 @@ impl Unifier {
TVar { .. } => allowed_typevars.iter().any(|b| self.unification_table.unioned(a, *b)),
TCall { .. } => false,
TVirtual { ty } => self.is_concrete(*ty, allowed_typevars),
TTuple { ty } => ty.iter().all(|ty| self.is_concrete(*ty, allowed_typevars)),
TTuple { ty, .. } => ty.iter().all(|ty| self.is_concrete(*ty, allowed_typevars)),
TObj { params: vars, .. } => {
vars.values().all(|ty| self.is_concrete(*ty, allowed_typevars))
}
@ -974,7 +984,10 @@ impl Unifier {
self.unify_impl(x, b, false)?;
self.set_a_to_b(a, x);
}
(TVar { fields: Some(fields), range, is_const_generic: false, .. }, TTuple { ty }) => {
(
TVar { fields: Some(fields), range, is_const_generic: false, .. },
TTuple { ty, .. },
) => {
let len = i32::try_from(ty.len()).unwrap();
for (k, v) in fields {
match *k {
@ -1071,15 +1084,47 @@ impl Unifier {
self.set_a_to_b(a, b);
}
(TTuple { ty: ty1 }, TTuple { ty: ty2 }) => {
if ty1.len() != ty2.len() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
(
TTuple { ty: ty1, is_vararg_ctx: is_vararg1 },
TTuple { ty: ty2, is_vararg_ctx: is_vararg2 },
) => {
// Rules for Tuples:
// - ty1: is_vararg && ty2: is_vararg -> ty1[0] == ty2[0]
// - ty1: is_vararg && ty2: !is_vararg -> type error (not enough info to infer the correct number of arguments)
// - ty1: !is_vararg && ty2: is_vararg -> ty1[..] == ty2[0]
// - ty1: !is_vararg && ty2: !is_vararg -> ty1.len() == ty2.len() && ty1[i] == ty2[i]
debug_assert!(!is_vararg1 || ty1.len() == 1);
debug_assert!(!is_vararg2 || ty2.len() == 1);
match (*is_vararg1, *is_vararg2) {
(true, true) => {
if self.unify_impl(ty1[0], ty2[0], false).is_err() {
return Self::incompatible_types(a, b);
}
}
(true, false) => return Self::incompatible_types(a, b),
(false, true) => {
for y in ty2 {
if self.unify_impl(ty1[0], *y, false).is_err() {
return Self::incompatible_types(a, b);
}
}
}
(false, false) => {
if ty1.len() != ty2.len() {
return Self::incompatible_types(a, b);
}
for (x, y) in ty1.iter().zip(ty2.iter()) {
if self.unify_impl(*x, *y, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
return Self::incompatible_types(a, b);
}
}
}
}
self.set_a_to_b(a, b);
}
(TVar { fields: Some(map), range, .. }, TObj { obj_id, fields, params }) => {
@ -1322,11 +1367,23 @@ impl Unifier {
TypeEnum::TLiteral { values, .. } => {
format!("const({})", values.iter().map(|v| format!("{v:?}")).join(", "))
}
TypeEnum::TTuple { ty } => {
let mut fields =
ty.iter().map(|v| self.internal_stringify(*v, obj_to_name, var_to_name, notes));
TypeEnum::TTuple { ty, is_vararg_ctx } => {
if *is_vararg_ctx {
debug_assert_eq!(ty.len(), 1);
let field = self.internal_stringify(
*ty.iter().next().unwrap(),
obj_to_name,
var_to_name,
notes,
);
format!("tuple[*{field}]")
} else {
let mut fields = ty
.iter()
.map(|v| self.internal_stringify(*v, obj_to_name, var_to_name, notes));
format!("tuple[{}]", fields.join(", "))
}
}
TypeEnum::TVirtual { ty } => {
format!(
"virtual[{}]",
@ -1446,7 +1503,7 @@ impl Unifier {
match &*ty {
TypeEnum::TRigidVar { .. } | TypeEnum::TLiteral { .. } => None,
TypeEnum::TVar { id, .. } => mapping.get(id).copied(),
TypeEnum::TTuple { ty } => {
TypeEnum::TTuple { ty, is_vararg_ctx } => {
let mut new_ty = Cow::from(ty);
for (i, t) in ty.iter().enumerate() {
if let Some(t1) = self.subst_impl(*t, mapping, cache) {
@ -1454,7 +1511,10 @@ impl Unifier {
}
}
if matches!(new_ty, Cow::Owned(_)) {
Some(self.add_ty(TypeEnum::TTuple { ty: new_ty.into_owned() }))
Some(self.add_ty(TypeEnum::TTuple {
ty: new_ty.into_owned(),
is_vararg_ctx: *is_vararg_ctx,
}))
} else {
None
}
@ -1614,16 +1674,37 @@ impl Unifier {
}
}
(TVar { range, .. }, _) => self.check_var_compatibility(b, range).or(Err(())),
(TTuple { ty: ty1 }, TTuple { ty: ty2 }) if ty1.len() == ty2.len() => {
let ty: Vec<_> = zip(ty1.iter(), ty2.iter())
.map(|(a, b)| self.get_intersection(*a, *b))
.try_collect()?;
if ty.iter().any(Option::is_some) {
Ok(Some(self.add_ty(TTuple {
ty: zip(ty, ty1.iter()).map(|(a, b)| a.unwrap_or(*b)).collect(),
})))
(
TTuple { ty: ty1, is_vararg_ctx: is_vararg1 },
TTuple { ty: ty2, is_vararg_ctx: is_vararg2 },
) => {
if *is_vararg1 && *is_vararg2 {
let isect_ty = self.get_intersection(ty1[0], ty2[0])?;
Ok(isect_ty.map(|ty| self.add_ty(TTuple { ty: vec![ty], is_vararg_ctx: true })))
} else {
Ok(None)
let zip_iter: Box<dyn Iterator<Item = (&Type, &Type)>> =
match (*is_vararg1, *is_vararg2) {
(true, _) => Box::new(repeat_n(&ty1[0], ty2.len()).zip(ty2.iter())),
(_, false) => Box::new(ty1.iter().zip(repeat_n(&ty2[0], ty1.len()))),
_ => {
if ty1.len() != ty2.len() {
return Err(());
}
Box::new(ty1.iter().zip(ty2.iter()))
}
};
let ty: Vec<_> =
zip_iter.map(|(a, b)| self.get_intersection(*a, *b)).try_collect()?;
Ok(if ty.iter().any(Option::is_some) {
Some(self.add_ty(TTuple {
ty: zip(ty, ty1.iter()).map(|(a, b)| a.unwrap_or(*b)).collect(),
is_vararg_ctx: false,
}))
} else {
None
})
}
}
// TODO(Derppening): #444

9
nac3core/src/typecheck/typedef/test.rs
View File

@ -28,7 +28,10 @@ impl Unifier {
TypeEnum::TVar { fields: Some(map1), .. },
TypeEnum::TVar { fields: Some(map2), .. },
) => self.map_eq2(map1, map2),
(TypeEnum::TTuple { ty: ty1 }, TypeEnum::TTuple { ty: ty2 }) => {
(
TypeEnum::TTuple { ty: ty1, is_vararg_ctx: false },
TypeEnum::TTuple { ty: ty2, is_vararg_ctx: false },
) => {
ty1.len() == ty2.len()
&& ty1.iter().zip(ty2.iter()).all(|(t1, t2)| self.eq(*t1, *t2))
}
@ -178,7 +181,7 @@ impl TestEnvironment {
ty.push(result.0);
s = result.1;
}
(self.unifier.add_ty(TypeEnum::TTuple { ty }), &s[1..])
(self.unifier.add_ty(TypeEnum::TTuple { ty, is_vararg_ctx: false }), &s[1..])
}
"Record" => {
let mut s = &typ[end..];
@ -608,7 +611,7 @@ fn test_instantiation() {
let v1 = env.unifier.get_fresh_var_with_range(&[list_v, int], None, None).ty;
let v2 = env.unifier.get_fresh_var_with_range(&[list_int, float], None, None).ty;
let t = env.unifier.get_dummy_var().ty;
let tuple = env.unifier.add_ty(TypeEnum::TTuple { ty: vec![v, v1, v2] });
let tuple = env.unifier.add_ty(TypeEnum::TTuple { ty: vec![v, v1, v2], is_vararg_ctx: false });
let v3 = env.unifier.get_fresh_var_with_range(&[tuple, t], None, None).ty;
// t = TypeVar('t')
// v = TypeVar('v', int, bool)