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use std::borrow::Cow;
use itertools::Itertools;
use rnode::{FoldWith, NodeId};
use stc_ts_ast_rnode::{RBindingIdent, RExpr, RIdent, RNumber, RObjectPatProp, RPat, RStr, RTsEntityName, RTsLit};
use stc_ts_errors::{
debug::{dump_type_as_string, force_dump_type_as_string},
DebugExt, ErrorKind,
};
use stc_ts_type_ops::{tuple_to_array::TupleToArray, widen::Widen, Fix};
use stc_ts_types::{
type_id::DestructureId, Array, CommonTypeMetadata, Instance, Key, KeywordType, LitType, OptionalType, PropertySignature, Ref, RestType,
Tuple, TupleElement, TupleMetadata, Type, TypeElement, TypeLit, TypeLitMetadata, TypeParam, TypeParamInstantiation, Union,
};
use stc_ts_utils::{run, PatExt};
use stc_utils::{cache::Freeze, dev_span, TryOpt};
use swc_common::{Span, Spanned, SyntaxContext, DUMMY_SP};
use swc_ecma_ast::{TsKeywordTypeKind, VarDeclKind};
use tracing::debug;
use crate::{
analyzer::{
assign::AssignOpts,
expr::{AccessPropertyOpts, GetIteratorOpts, IdCtx, TypeOfMode},
types::NormalizeTypeOpts,
util::{opt_union, ResultExt},
Analyzer, Ctx,
},
ty::TypeExt,
validator::ValidateWith,
VResult,
};
/// The kind of binding.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum VarKind {
Var(VarDeclKind),
/// Function parameters.
Param,
Class,
/// [stc_ts_ast_rnode::RFnDecl]
Fn,
Import,
Enum,
Error,
}
/// All bool fields default to `false`.
#[derive(Debug, Clone, Copy)]
pub(crate) struct DeclareVarsOpts {
pub kind: VarKind,
pub use_iterator_for_array: bool,
}
impl Default for DeclareVarsOpts {
fn default() -> Self {
Self {
kind: VarKind::Var(VarDeclKind::Var),
use_iterator_for_array: false,
}
}
}
impl Analyzer<'_, '_> {
/// TODO(kdy1): Rename to declare_vars
///
/// # Parameters
///
///
/// ## actual
///
/// The type of actual value.
///
///
/// ## default
///
/// The type of default value specified by an assignment pattern.
pub(crate) fn add_vars(
&mut self,
pat: &RPat,
ty: Option<Type>,
actual: Option<Type>,
default: Option<Type>,
opts: DeclareVarsOpts,
) -> VResult<Option<Type>> {
if let Some(ty) = &ty {
ty.assert_valid();
if !self.config.is_builtin {
ty.assert_clone_cheap();
}
}
if let Some(ty) = &actual {
ty.assert_valid();
if !self.config.is_builtin {
ty.assert_clone_cheap();
}
}
if let Some(ty) = &default {
ty.assert_valid();
if !self.config.is_builtin {
ty.assert_clone_cheap();
}
}
let span = pat.span().with_ctxt(SyntaxContext::empty());
match pat {
RPat::Ident(i) => {
if let Some(ty) = &ty {
if cfg!(debug_assertions) {
debug!("[vars]: Declaring {} as {}", i.id.sym, dump_type_as_string(ty));
}
} else {
if cfg!(debug_assertions) {
debug!("[vars]: Declaring {} without type", i.id.sym);
}
}
let mut ty = match (default, ty) {
(Some(default), Some(ty)) => {
if let Some(true) = self.extends(span, &default, &ty, Default::default()) {
Some(ty)
} else {
opt_union(span, Some(ty), Some(default))
}
}
(default, ty) => opt_union(span, ty, default),
};
ty.freeze();
if let Some(ty) = &ty {
if let Some(m) = &mut self.mutations {
m.for_pats.entry(i.node_id).or_default().ty = Some(ty.clone());
}
}
self.declare_var(
span,
opts.kind,
i.id.clone().into(),
ty,
actual,
// initialized
true,
// let/const declarations does not allow multiple declarations with
// same name
opts.kind == VarKind::Var(VarDeclKind::Var),
false,
false,
)
}
RPat::Assign(p) => {
let type_ann = p.left.get_ty();
let type_ann: Option<Type> = match type_ann {
Some(v) => v.validate_with(self).report(&mut self.storage),
None => None,
};
let is_typed = type_ann.is_some();
let mut type_ann = type_ann.or(default);
type_ann.freeze();
let mut right = p
.right
.validate_with_args(self, (TypeOfMode::RValue, None, type_ann.as_ref().or(ty.as_ref())))
.report(&mut self.storage)
.unwrap_or_else(|| Type::any(span, Default::default()));
if self.ctx.is_fn_param && type_ann.is_none() {
// If the declaration includes an initializer expression (which is permitted
// only when the parameter list occurs in conjunction with a
// function body), the parameter type is the widened form (section
// 3.11) of the type of the initializer expression.
match &*p.left {
RPat::Array(p_left) => {
right = right.fold_with(&mut Widen { tuple_to_array: false });
}
_ => {
right = right.fold_with(&mut Widen { tuple_to_array: true });
}
}
}
right.freeze();
if let Some(type_ann) = &type_ann {
self.assign_with_opts(
&mut Default::default(),
type_ann,
&right,
AssignOpts {
span: p.right.span(),
allow_assignment_to_param_constraint: false,
..Default::default()
},
)
.context("tried to assign a value to a variable with an assignment pattern")
.report(&mut self.storage);
}
let default = if is_typed {
type_ann
} else {
opt_union(span, type_ann, Some(right))
}
.freezed();
self.add_vars(
&p.left,
ty,
actual,
default,
DeclareVarsOpts {
use_iterator_for_array: true,
..opts
},
)
.context("tried to declare a variable with an assignment pattern")
}
RPat::Array(arr) => {
if opts.use_iterator_for_array {
// Handle tuple
//
// const [a , setA] = useState();
//
let ty = ty
.map(|ty| {
self.get_iterator(
span,
Cow::Owned(ty),
GetIteratorOpts {
disallow_str: true,
..Default::default()
},
)
.context("tried to convert a type to an iterator to assign with an array pattern.")
.unwrap_or_else(|err| {
self.storage.report(err);
Cow::Owned(Type::any(span, Default::default()))
})
})
.freezed()
.map(Cow::into_owned);
let default_ty = default;
let default = default_ty
.as_ref()
.map(|ty| {
self.get_iterator(
span,
Cow::Borrowed(ty),
GetIteratorOpts {
disallow_str: true,
..Default::default()
},
)
.context("tried to convert a type to an iterator to assign with an array pattern (default value)")
.unwrap_or_else(|err| {
self.storage.report(err);
Cow::Owned(Type::any(span, Default::default()))
})
})
.freezed()
.map(Cow::into_owned);
for (idx, elem) in arr.elems.iter().enumerate() {
if let Some(elem) = elem {
if let RPat::Rest(elem) = elem {
// Rest element is special.
let type_for_rest_arg = match &ty {
Some(ty) => self
.get_rest_elements(Some(span), Cow::Borrowed(ty), idx)
.context("tried to get left elements of an iterator to declare variables using a rest pattern")
.map(Cow::into_owned)
.report(&mut self.storage),
None => None,
}
.freezed();
let default = match default {
Some(ty) => self
.get_rest_elements(Some(span), Cow::Borrowed(&ty), idx)
.context("tried to get left elements of an iterator to declare variables using a rest pattern")
.map(Cow::into_owned)
.report(&mut self.storage),
None => None,
}
.freezed();
self.add_vars(&elem.arg, type_for_rest_arg, None, default, DeclareVarsOpts { ..opts })
.context("tried to declare left elements to the argument of a rest pattern")
.report(&mut self.storage);
break;
}
let elem_ty = ty
.as_ref()
.try_map(|ty| -> VResult<Type> {
let result = self.get_element_from_iterator(span, Cow::Borrowed(ty), idx).with_context(|| {
format!(
"tried to get the type of {}th element from iterator to declare vars with an array pattern",
idx
)
});
match result {
Ok(ty) => Ok(ty.into_owned().generalize_lit()),
Err(err) => match &*err {
ErrorKind::TupleIndexError { .. } => match elem {
RPat::Assign(p) => {
let type_ann = p.left.get_ty();
let type_ann: Option<Type> =
type_ann.and_then(|v| v.validate_with(self).report(&mut self.storage));
let type_ann = type_ann.or_else(|| default_ty.clone());
let right = p
.right
.validate_with_args(
self,
(TypeOfMode::RValue, None, type_ann.as_ref().or(Some(ty))),
)
.report(&mut self.storage)
.unwrap_or_else(|| Type::any(span, Default::default()));
Ok(right)
}
RPat::Rest(p) => {
// [a, ...b] = [1]
// b should be an empty tuple
Ok(Type::Tuple(Tuple {
span: p.span,
elems: vec![],
metadata: Default::default(),
tracker: Default::default(),
}))
}
_ => Err(err),
},
_ => Err(err),
},
}
})?
.freezed();
let default_elem_ty = default
.as_ref()
.and_then(|ty| {
self.get_element_from_iterator(span, Cow::Borrowed(ty), idx)
.with_context(|| {
format!(
"tried to get the type of {}th element from iterator to declare vars with an array \
pattern (default value)",
idx
)
})
.ok()
})
.map(Cow::into_owned)
.map(|ty| ty.generalize_lit())
.freezed();
// TODO(kdy1): actual_ty
self.add_vars(elem, elem_ty, None, default_elem_ty, opts)?;
}
}
// Type inference for functions
let default_ty = match default_ty {
Some(d_ty) => {
let d_ty = d_ty.fold_with(&mut Widen { tuple_to_array: false });
match d_ty {
Type::Tuple(mut ty) => {
let right_type_len = ty.elems.len();
for (i, left_element) in arr.elems.iter().enumerate() {
let is_not_assigned_type = i + 1 > right_type_len;
if let Some(r_pat) = left_element {
match r_pat {
RPat::Assign(p) => {
if is_not_assigned_type {
let mut elem_ty = p
.right
.as_ref()
.validate_with_default(self)?
.fold_with(&mut Widen { tuple_to_array: false });
let convert_ty = match elem_ty.as_union_type_mut() {
Some(union_obj) => {
let mut has_undefined = false;
for union_ty in union_obj.types.iter() {
if let Type::Keyword(a) = union_ty {
if TsKeywordTypeKind::TsUndefinedKeyword == a.kind {
has_undefined = true
}
}
}
if !has_undefined {
union_obj.types.push(Type::undefined(span, Default::default()));
}
box Type::Union(union_obj.clone())
}
None => match elem_ty.normalize() {
Type::Keyword(KeywordType {
kind: TsKeywordTypeKind::TsAnyKeyword,
..
})
| Type::Keyword(KeywordType {
kind: TsKeywordTypeKind::TsUnknownKeyword,
..
}) => box elem_ty,
Type::Keyword(KeywordType {
kind: TsKeywordTypeKind::TsNeverKeyword,
..
}) => box Type::undefined(span, Default::default()),
_ => box Type::Union(Union {
span,
types: vec![elem_ty, Type::undefined(span, Default::default())],
metadata: Default::default(),
tracker: Default::default(),
}),
},
};
ty.elems.push(TupleElement {
span,
label: None,
ty: box Type::Optional(OptionalType {
span,
ty: convert_ty,
metadata: Default::default(),
tracker: Default::default(),
}),
tracker: Default::default(),
});
}
}
_ => {
if is_not_assigned_type {
ty.elems.push(TupleElement {
span,
label: None,
ty: box Type::Optional(OptionalType {
span,
ty: box Type::any(span, Default::default()),
metadata: Default::default(),
tracker: Default::default(),
}),
tracker: Default::default(),
});
}
}
}
}
}
Some(Type::Tuple(ty))
}
Type::Array(..) => {
let any_len = arr.elems.len();
let mut elems: Vec<TupleElement> = vec![];
for i in 0..any_len {
elems.push(TupleElement {
span,
label: None,
ty: box Type::Optional(OptionalType {
span,
ty: box Type::any(span, Default::default()),
metadata: Default::default(),
tracker: Default::default(),
}),
tracker: Default::default(),
});
}
Some(Type::Tuple(Tuple {
span,
elems,
metadata: Default::default(),
tracker: Default::default(),
}))
}
_ => Some(d_ty),
}
}
None => None,
};
Ok(ty.or(default_ty))
} else {
let mut elems = vec![];
let destructure_key = self.get_destructor_unique_key();
let mut has_rest = false;
for (idx, elem) in arr.elems.iter().enumerate() {
match elem {
Some(elem) => {
if let RPat::Rest(elem) = elem {
has_rest = true;
// Rest element is special.
let type_for_rest_arg = match &ty {
Some(ty) => self
.get_rest_elements(Some(span), Cow::Borrowed(ty), idx)
.context("tried to get left elements of an iterator to declare variables using a rest pattern")
.map(Cow::into_owned)
.report(&mut self.storage),
None => None,
}
.freezed();
let default = match &default {
Some(ty) => self
.get_rest_elements(Some(span), Cow::Borrowed(ty), idx)
.context("tried to get left elements of an iterator to declare variables using a rest pattern")
.map(Cow::into_owned)
.report(&mut self.storage),
None => None,
}
.freezed();
let rest_ty = self
.add_vars(&elem.arg, type_for_rest_arg, None, default, DeclareVarsOpts { ..opts })
.context("tried to declare left elements to the argument of a rest pattern")
.report(&mut self.storage)
.flatten();
elems.push(TupleElement {
span: elem.span(),
label: Some(*elem.arg.clone()),
ty: box Type::Rest(RestType {
span: elem.span,
ty: box rest_ty.unwrap_or_else(|| Type::any(elem.span, Default::default())),
metadata: Default::default(),
tracker: Default::default(),
})
.freezed(),
tracker: Default::default(),
});
break;
}
let mut elem_ty = match &ty {
Some(ty) => self
.access_property(
elem.span(),
ty,
&Key::Num(RNumber {
span: elem.span(),
value: idx as f64,
raw: None,
}),
TypeOfMode::RValue,
IdCtx::Var,
Default::default(),
)
.map(|ty| ty.generalize_lit())
.context("tried to access property to declare variables using an array pattern")
.report(&mut self.storage),
None => None,
}
.freezed();
let default = match &default {
Some(ty) => self
.access_property(
elem.span(),
ty,
&Key::Num(RNumber {
span: elem.span(),
value: idx as f64,
raw: None,
}),
TypeOfMode::RValue,
IdCtx::Var,
Default::default(),
)
.map(|ty| ty.generalize_lit())
.context("tried to access property to declare variables using an array pattern")
.report(&mut self.storage),
None => None,
}
.freezed();
if let Some(ty) = &mut elem_ty {
add_destructure_sign(ty, destructure_key);
}
// TODO(kdy1): actual_ty
let elem_ty = self
.add_vars(elem, elem_ty, None, default, opts)
.report(&mut self.storage)
.flatten();
elems.push(TupleElement {
span: elem.span(),
label: Some(elem.clone()),
ty: box elem_ty.unwrap_or_else(|| Type::any(elem.span(), Default::default())).freezed(),
tracker: Default::default(),
});
}
// Skip
None => {}
}
}
let save_ty = ty.clone().map(|ty| {
if let Ok(ty) = self.normalize(Some(span), Cow::Borrowed(&ty), Default::default()) {
let mut ty = ty.into_owned();
if let Type::Union(Union { types, .. }) = ty.normalize_mut() {
'outer: for member in types.iter_mut() {
if let Type::Tuple(tuple) = member.normalize_mut() {
for (idx, (inner, outer)) in tuple.elems.iter_mut().zip(elems.iter()).enumerate() {
if has_rest && elems.len() - 1 == idx {
break 'outer;
}
inner.label = outer.label.clone();
}
}
}
}
return ty;
}
ty
});
let mut real_ty = Type::Tuple(Tuple {
span,
elems,
metadata: TupleMetadata {
common: CommonTypeMetadata {
destructure_key,
..Default::default()
},
..Default::default()
},
tracker: Default::default(),
});
if let Some(ty) = &ty {
let t = ty.normalize_instance();
if t.is_array() || (t.is_tuple() && arr.type_ann.is_none() && self.ctx.is_calling_iife) {
real_ty = real_ty.fold_with(&mut TupleToArray);
real_ty.fix();
}
}
real_ty.freeze();
self.regist_destructure(span, save_ty, Some(destructure_key));
Ok(Some(real_ty))
}
}
RPat::Object(obj) => {
let normalize_ty = ty.as_ref().map(Type::normalize);
let should_use_no_such_property = !matches!(normalize_ty, Some(Type::TypeLit(..)));
let destructure_key = self.regist_destructure(span, ty.clone(), None);
let mut real = Type::TypeLit(TypeLit {
span,
members: vec![],
metadata: TypeLitMetadata {
common: CommonTypeMetadata {
destructure_key,
..Default::default()
},
..Default::default()
},
tracker: Default::default(),
});
// TODO(kdy1): Normalize static
//
let mut used_keys = vec![];
for (idx, prop) in obj.props.iter().enumerate() {
let is_last = idx == obj.props.len() - 1;
match prop {
RObjectPatProp::KeyValue(prop) => {
let key = prop.key.validate_with(self)?;
used_keys.push(key.clone());
let ctx = Ctx {
disallow_unknown_object_property: true,
..self.ctx
};
let prop_ty = ty.as_ref().try_map(|ty| {
self.with_ctx(ctx)
.access_property(
span,
ty,
&key,
TypeOfMode::RValue,
IdCtx::Var,
AccessPropertyOpts {
disallow_indexing_array_with_string: true,
disallow_creating_indexed_type_from_ty_els: true,
disallow_inexact: true,
..Default::default()
},
)
.map(|ty| ty.generalize_lit())
.context("tried to access property to declare variables")
});
let default_prop_ty = default
.as_ref()
.and_then(|ty| {
self.with_ctx(ctx)
.access_property(
span,
ty,
&key,
TypeOfMode::RValue,
IdCtx::Var,
AccessPropertyOpts {
disallow_indexing_array_with_string: true,
disallow_creating_indexed_type_from_ty_els: true,
disallow_inexact: true,
..Default::default()
},
)
.ok()
})
.map(|ty| ty.generalize_lit())
.freezed();
let real_property_type = match prop_ty {
Ok(prop_ty) => {
// TODO(kdy1): actual_ty
self.add_vars(&prop.value, prop_ty.freezed(), None, default_prop_ty, opts)
.report(&mut self.storage)
}
Err(err) => {
match &*err {
ErrorKind::NoSuchProperty { span, .. } | ErrorKind::NoSuchPropertyInClass { span, .. }
if !should_use_no_such_property =>
{
if default_prop_ty.is_none() {
self.storage.report(ErrorKind::NoInitAndNoDefault { span: *span }.into())
}
}
_ => self.storage.report(err),
}
self.add_vars(&prop.value, None, None, default_prop_ty, opts)
.report(&mut self.storage)
}
}
.flatten()
.map(|v| box v);
real = self.append_type_element(
real,
TypeElement::Property(PropertySignature {
span,
accessibility: None,
readonly: false,
key,
optional: true,
params: Vec::new(),
type_ann: real_property_type,
type_params: None,
metadata: Default::default(),
accessor: Default::default(),
}),
)?;
}
RObjectPatProp::Assign(prop) => {
let key = Key::Normal {
span: prop.key.span,
sym: prop.key.sym.clone(),
};
used_keys.push(key.clone());
let optional = default.is_some() || prop.value.is_some();
let ctx = Ctx {
disallow_unknown_object_property: true,
..self.ctx
};
let prop_ty = ty.as_ref().try_map(|ty| {
self.with_ctx(ctx)
.access_property(
span,
ty,
&key,
TypeOfMode::RValue,
IdCtx::Var,
AccessPropertyOpts {
disallow_indexing_array_with_string: true,
disallow_creating_indexed_type_from_ty_els: true,
disallow_inexact: true,
..Default::default()
},
)
.map(|ty| ty.generalize_lit())
.context("tried to access property to declare variables")
});
let mut default_prop_ty = default
.as_ref()
.and_then(|ty| {
self.with_ctx(ctx)
.access_property(
span,
ty,
&key,
TypeOfMode::RValue,
IdCtx::Var,
AccessPropertyOpts {
disallow_indexing_array_with_string: true,
disallow_creating_indexed_type_from_ty_els: true,
disallow_inexact: true,
..Default::default()
},
)
.ok()
})
.map(|ty| ty.generalize_lit())
.freezed();
let real_property_type = match prop_ty {
Ok(mut prop_ty) => {
if let Some(ty) = &mut prop_ty {
add_destructure_sign(ty, destructure_key);
}
let prop_ty = prop_ty.map(Type::freezed);
match &prop.value {
Some(default) => {
let mut default_value_type = default
.validate_with_args(
self,
(TypeOfMode::RValue, None, prop_ty.as_ref().or(default_prop_ty.as_ref())),
)
.context("tried to validate default value of an assignment pattern")
.report(&mut self.storage);
if self.ctx.is_fn_param && prop_ty.is_none() {
default_value_type = default_value_type.fold_with(&mut Widen { tuple_to_array: true });
}
default_value_type.freeze();
let mut default = opt_union(span, default_prop_ty, default_value_type).freezed();
// TODO(kdy1): Pass default when it's possible.
if prop_ty.is_some() {
default = None;
}
let result = self
.add_vars(
&RPat::Ident(RBindingIdent {
node_id: NodeId::invalid(),
id: prop.key.clone(),
type_ann: None,
}),
prop_ty.clone(),
None,
default,
opts,
)
.report(&mut self.storage);
if let Some(prop_ty) = &prop_ty {
self.try_assign_pat(
span,
&RPat::Ident(RBindingIdent {
node_id: NodeId::invalid(),
id: prop.key.clone(),
type_ann: None,
}),
prop_ty,
)
.context("tried to assign default values")
.report(&mut self.storage);
}
result
}
None => {
// TODO(kdy1): actual_ty
self.add_vars(
&RPat::Ident(RBindingIdent {
node_id: NodeId::invalid(),
id: prop.key.clone(),
type_ann: None,
}),
prop_ty,
None,
default_prop_ty,
opts,
)
.report(&mut self.storage)
}
}
}
Err(err) => {
match &*err {
ErrorKind::NoSuchProperty { span, .. } | ErrorKind::NoSuchPropertyInClass { span, .. }
if !should_use_no_such_property =>
{
if default_prop_ty.is_none() {
self.storage.report(ErrorKind::NoInitAndNoDefault { span: *span }.into())
}
}
_ => self.storage.report(err),
}
if let Some(ty) = &mut default_prop_ty {
add_destructure_sign(ty, destructure_key);
}
self.add_vars(
&RPat::Ident(RBindingIdent {
node_id: NodeId::invalid(),
id: prop.key.clone(),
type_ann: None,
}),
None,
None,
default_prop_ty,
opts,
)
.report(&mut self.storage)
}
};
real = self.append_type_element(
real,
TypeElement::Property(PropertySignature {
span,
accessibility: None,
readonly: false,
key,
optional,
params: Vec::new(),
type_ann: real_property_type.flatten().map(|v| box v),
type_params: None,
metadata: Default::default(),
accessor: Default::default(),
}),
)?;
}
RObjectPatProp::Rest(pat) => {
if !is_last {
return Err(ErrorKind::RestPropertyNotLast { span: pat.span }.into());
}
let mut rest_ty = ty
.as_ref()
.try_map(|ty| {
self.exclude_props(pat.span(), ty, &used_keys)
.context("tried to exclude keys for assignment with a object rest pattern")
})?
.freezed();
let mut default = default
.as_ref()
.and_then(|ty| self.exclude_props(pat.span(), ty, &used_keys).ok())
.freezed();
if let Some(ty) = &mut rest_ty {
remove_readonly(ty);
add_destructure_sign(ty, destructure_key);
}
if let Some(ty) = &mut default {
remove_readonly(ty);
}
let rest = self
.add_vars(&pat.arg, rest_ty, None, default, opts)
.context("tried to assign to an object rest pattern")?;
if let Some(rest) = rest {
real.freeze();
real = self.append_type(span, real, rest, Default::default())?;
}
break;
}
}
}
Ok(Some(real))
}
RPat::Rest(pat) => {
let ty = ty.map(|ty| self.ensure_iterable(span, ty)).transpose()?;
let actual = actual.map(|ty| self.ensure_iterable(span, ty)).transpose()?;
let default = default.map(|ty| self.ensure_iterable(span, ty)).transpose()?;
self.add_vars(&pat.arg, ty, actual, default, DeclareVarsOpts { ..opts })
}
RPat::Invalid(..) | RPat::Expr(box RExpr::Invalid(..)) => Ok(None),
_ => {
unimplemented!("declare_vars({:#?}, {:#?})", pat, ty)
}
}
}
pub(crate) fn exclude_props(&mut self, span: Span, ty: &Type, keys: &[Key]) -> VResult<Type> {
let _tracing = dev_span!("exclude_props");
let span = span.with_ctxt(SyntaxContext::empty());
let ty = (|| -> VResult<_> {
let mut ty = self.normalize(
Some(span),
Cow::Borrowed(ty),
NormalizeTypeOpts {
preserve_mapped: false,
..Default::default()
},
)?;
ty.freeze();
if ty.is_any() || ty.is_unknown() || ty.is_kwd(TsKeywordTypeKind::TsObjectKeyword) {
return Ok(ty.into_owned());
}
match ty.normalize() {
Type::TypeLit(lit) => {
let mut new_members = vec![];
'outer: for m in &lit.members {
if let Some(key) = m.key() {
for prop in keys {
if self.key_matches(span, key, prop, false) {
continue 'outer;
}
}
new_members.push(m.clone());
}
}
return Ok(Type::TypeLit(TypeLit {
span: lit.span,
members: new_members,
metadata: lit.metadata,
tracker: Default::default(),
}));
}
Type::Union(u) => {
let types = u
.types
.iter()
.map(|ty| self.exclude_props(span, ty, keys))
.collect::<Result<_, _>>()?;
return Ok(Type::Union(Union {
span: u.span,
types,
metadata: u.metadata,
tracker: Default::default(),
}));
}
Type::Intersection(..) | Type::Class(..) | Type::Interface(..) | Type::ClassDef(..) => {
let ty = self
.convert_type_to_type_lit(ty.span(), Cow::Borrowed(&ty))?
.map(Cow::into_owned)
.map(Type::TypeLit);
if let Some(ty) = ty {
return self.exclude_props(span, &ty, keys);
}
}
// TODO
Type::Function(..) | Type::Constructor(..) => {
return Ok(Type::TypeLit(TypeLit {
span: ty.span(),
members: vec![],
metadata: Default::default(),
tracker: Default::default(),
}))
}
// Create Omit<T, 'foo' | 'bar'>
Type::Param(..) => {
let key_types = keys
.iter()
.filter_map(|key| match key {
Key::BigInt(v) => Some(Type::Lit(LitType {
span: v.span.with_ctxt(SyntaxContext::empty()),
lit: RTsLit::BigInt(v.clone()),
metadata: Default::default(),
tracker: Default::default(),
})),
Key::Num(v) => Some(Type::Lit(LitType {
span: v.span.with_ctxt(SyntaxContext::empty()),
lit: RTsLit::Number(v.clone()),
metadata: Default::default(),
tracker: Default::default(),
})),
Key::Normal { span, sym } => Some(Type::Lit(LitType {
span: span.with_ctxt(SyntaxContext::empty()),
lit: RTsLit::Str(RStr {
span: *span,
value: sym.clone(),
raw: None,
}),
metadata: Default::default(),
tracker: Default::default(),
})),
// TODO
_ => None,
})
.collect_vec();
if key_types.is_empty() {
return Ok(ty.into_owned());
}
let keys = Type::Union(Union {
span,
types: key_types,
metadata: Default::default(),
tracker: Default::default(),
});
return Ok(Type::Ref(Ref {
span,
type_name: RTsEntityName::Ident(RIdent::new("Omit".into(), DUMMY_SP)),
type_args: Some(box TypeParamInstantiation {
span,
params: vec![ty.clone().into_owned(), keys],
}),
metadata: Default::default(),
tracker: Default::default(),
}));
}
_ => {}
}
Err(ErrorKind::Unimplemented {
span,
msg: format!("exclude_props: {}", force_dump_type_as_string(&ty)),
}
.into())
})()?;
Ok(ty.fixed())
}
fn ensure_iterable(&mut self, span: Span, ty: Type) -> VResult<Type> {
run(|| {
if let Ok(..) = self.get_iterator(
span,
Cow::Borrowed(&ty),
GetIteratorOpts {
disallow_str: true,
..Default::default()
},
) {
return Ok(ty.freezed());
}
Ok(Type::Array(Array {
span,
elem_type: box ty,
metadata: Default::default(),
tracker: Default::default(),
})
.freezed())
})
.context("tried to ensure iterator")
}
pub fn regist_destructure(&mut self, span: Span, ty: Option<Type>, des_key: Option<DestructureId>) -> DestructureId {
match ty.as_ref().map(Type::normalize) {
Some(real @ Type::Union(..)) => {
let des_key = des_key.unwrap_or_else(|| self.get_destructor_unique_key());
let destructure_key = des_key;
if let Ok(result) = self.declare_destructor(span, real, des_key) {
if result {
return destructure_key;
}
}
}
Some(Type::Param(TypeParam {
constraint: Some(box result),
..
})) => {
if let Ok(result) = self.normalize(Some(span), Cow::Borrowed(result), Default::default()) {
return self.regist_destructure(span, Some(result.into_owned()), des_key);
}
}
Some(Type::Instance(Instance { ty: box result, .. })) => {
if let Ok(result) = self.normalize(Some(span), Cow::Borrowed(result), Default::default()) {
return self.regist_destructure(span, Some(result.into_owned()), des_key);
}
}
Some(Type::Tuple(Tuple { elems, .. })) => {
if elems.len() == 1 {
if let Some(TupleElement { ty: box ty, .. }) = elems.first() {
return self.regist_destructure(span, Some(ty.clone()), des_key);
}
}
}
Some(Type::Rest(RestType { ty: box ty, .. })) => {
return self.regist_destructure(span, Some(ty.clone()), des_key);
}
_ => {}
}
DestructureId(0)
}
}
fn remove_readonly(ty: &mut Type) {
if let Some(tl) = ty.as_type_lit_mut() {
for m in &mut tl.members {
if let TypeElement::Property(p) = m {
p.readonly = false;
}
}
ty.freeze();
}
}
fn add_destructure_sign(ty: &mut Type, key: DestructureId) {
ty.metadata_mut().destructure_key = key;
ty.freeze();
}