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Use macros to avoid expect_* boilerplate.

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The majority of these aren't actually used, but I kept them anyway.
This commit is contained in:
Nicholas Nethercote 2023-11-21 14:55:58 +11:00
parent ec10e3726c
commit 72653c1f50
1 changed files with 102 additions and 369 deletions
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471
compiler/rustc_hir/src/hir.rs
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@ -2267,6 +2267,35 @@ pub struct TraitItem<'hir> {
pub defaultness: Defaultness,
}
macro_rules! expect_methods_self_kind {
( $( $name:ident, $ret_ty:ty, $pat:pat, $ret_val:expr; )* ) => {
$(
#[track_caller]
pub fn $name(&self) -> $ret_ty {
let $pat = &self.kind else { expect_failed(stringify!($ident), self) };
$ret_val
}
)*
}
}
macro_rules! expect_methods_self {
( $( $name:ident, $ret_ty:ty, $pat:pat, $ret_val:expr; )* ) => {
$(
#[track_caller]
pub fn $name(&self) -> $ret_ty {
let $pat = self else { expect_failed(stringify!($ident), self) };
$ret_val
}
)*
}
}
#[track_caller]
fn expect_failed<T: fmt::Debug>(ident: &'static str, found: T) -> ! {
panic!("{ident}: found {found:?}")
}
impl<'hir> TraitItem<'hir> {
#[inline]
pub fn hir_id(&self) -> HirId {
@ -2278,30 +2307,15 @@ impl<'hir> TraitItem<'hir> {
TraitItemId { owner_id: self.owner_id }
}
/// Expect an [`TraitItemKind::Const`] or panic.
#[track_caller]
pub fn expect_const(&self) -> (&'hir Ty<'hir>, Option<BodyId>) {
let TraitItemKind::Const(ty, body) = self.kind else { self.expect_failed("a constant") };
(ty, body)
}
expect_methods_self_kind! {
expect_const, (&'hir Ty<'hir>, Option<BodyId>),
TraitItemKind::Const(ty, body), (ty, *body);
/// Expect an [`TraitItemKind::Fn`] or panic.
#[track_caller]
pub fn expect_fn(&self) -> (&FnSig<'hir>, &TraitFn<'hir>) {
let TraitItemKind::Fn(ty, trfn) = &self.kind else { self.expect_failed("a function") };
(ty, trfn)
}
expect_fn, (&FnSig<'hir>, &TraitFn<'hir>),
TraitItemKind::Fn(ty, trfn), (ty, trfn);
/// Expect an [`TraitItemKind::Type`] or panic.
#[track_caller]
pub fn expect_type(&self) -> (GenericBounds<'hir>, Option<&'hir Ty<'hir>>) {
let TraitItemKind::Type(bounds, ty) = self.kind else { self.expect_failed("a type") };
(bounds, ty)
}
#[track_caller]
fn expect_failed(&self, expected: &'static str) -> ! {
panic!("expected {expected} item, found {self:?}")
expect_type, (GenericBounds<'hir>, Option<&'hir Ty<'hir>>),
TraitItemKind::Type(bounds, ty), (bounds, *ty);
}
}
@ -2366,30 +2380,10 @@ impl<'hir> ImplItem<'hir> {
ImplItemId { owner_id: self.owner_id }
}
/// Expect an [`ImplItemKind::Const`] or panic.
#[track_caller]
pub fn expect_const(&self) -> (&'hir Ty<'hir>, BodyId) {
let ImplItemKind::Const(ty, body) = self.kind else { self.expect_failed("a constant") };
(ty, body)
}
/// Expect an [`ImplItemKind::Fn`] or panic.
#[track_caller]
pub fn expect_fn(&self) -> (&FnSig<'hir>, BodyId) {
let ImplItemKind::Fn(ty, body) = &self.kind else { self.expect_failed("a function") };
(ty, *body)
}
/// Expect an [`ImplItemKind::Type`] or panic.
#[track_caller]
pub fn expect_type(&self) -> &'hir Ty<'hir> {
let ImplItemKind::Type(ty) = self.kind else { self.expect_failed("a type") };
ty
}
#[track_caller]
fn expect_failed(&self, expected: &'static str) -> ! {
panic!("expected {expected} item, found {self:?}")
expect_methods_self_kind! {
expect_const, (&'hir Ty<'hir>, BodyId), ImplItemKind::Const(ty, body), (ty, *body);
expect_fn, (&FnSig<'hir>, BodyId), ImplItemKind::Fn(ty, body), (ty, *body);
expect_type, &'hir Ty<'hir>, ImplItemKind::Type(ty), ty;
}
}
@ -3075,134 +3069,51 @@ impl<'hir> Item<'hir> {
ItemId { owner_id: self.owner_id }
}
/// Expect an [`ItemKind::ExternCrate`] or panic.
#[track_caller]
pub fn expect_extern_crate(&self) -> Option<Symbol> {
let ItemKind::ExternCrate(s) = self.kind else { self.expect_failed("an extern crate") };
s
}
expect_methods_self_kind! {
expect_extern_crate, Option<Symbol>, ItemKind::ExternCrate(s), *s;
/// Expect an [`ItemKind::Use`] or panic.
#[track_caller]
pub fn expect_use(&self) -> (&'hir UsePath<'hir>, UseKind) {
let ItemKind::Use(p, uk) = self.kind else { self.expect_failed("a use") };
(p, uk)
}
expect_use, (&'hir UsePath<'hir>, UseKind), ItemKind::Use(p, uk), (p, *uk);
/// Expect an [`ItemKind::Static`] or panic.
#[track_caller]
pub fn expect_static(&self) -> (&'hir Ty<'hir>, Mutability, BodyId) {
let ItemKind::Static(ty, mutbl, body) = self.kind else { self.expect_failed("a static") };
(ty, mutbl, body)
}
/// Expect an [`ItemKind::Const`] or panic.
#[track_caller]
pub fn expect_const(&self) -> (&'hir Ty<'hir>, &'hir Generics<'hir>, BodyId) {
let ItemKind::Const(ty, gen, body) = self.kind else { self.expect_failed("a constant") };
(ty, gen, body)
}
/// Expect an [`ItemKind::Fn`] or panic.
#[track_caller]
pub fn expect_fn(&self) -> (&FnSig<'hir>, &'hir Generics<'hir>, BodyId) {
let ItemKind::Fn(sig, gen, body) = &self.kind else { self.expect_failed("a function") };
(sig, gen, *body)
}
expect_static, (&'hir Ty<'hir>, Mutability, BodyId),
ItemKind::Static(ty, mutbl, body), (ty, *mutbl, *body);
/// Expect an [`ItemKind::Macro`] or panic.
#[track_caller]
pub fn expect_macro(&self) -> (&ast::MacroDef, MacroKind) {
let ItemKind::Macro(def, mk) = &self.kind else { self.expect_failed("a macro") };
(def, *mk)
}
expect_const, (&'hir Ty<'hir>, &'hir Generics<'hir>, BodyId),
ItemKind::Const(ty, gen, body), (ty, gen, *body);
/// Expect an [`ItemKind::Mod`] or panic.
#[track_caller]
pub fn expect_mod(&self) -> &'hir Mod<'hir> {
let ItemKind::Mod(m) = self.kind else { self.expect_failed("a module") };
m
}
expect_fn, (&FnSig<'hir>, &'hir Generics<'hir>, BodyId),
ItemKind::Fn(sig, gen, body), (sig, gen, *body);
/// Expect an [`ItemKind::ForeignMod`] or panic.
#[track_caller]
pub fn expect_foreign_mod(&self) -> (Abi, &'hir [ForeignItemRef]) {
let ItemKind::ForeignMod { abi, items } = self.kind else {
self.expect_failed("a foreign module")
};
(abi, items)
}
expect_macro, (&ast::MacroDef, MacroKind), ItemKind::Macro(def, mk), (def, *mk);
/// Expect an [`ItemKind::GlobalAsm`] or panic.
#[track_caller]
pub fn expect_global_asm(&self) -> &'hir InlineAsm<'hir> {
let ItemKind::GlobalAsm(asm) = self.kind else { self.expect_failed("a global asm") };
asm
}
expect_mod, &'hir Mod<'hir>, ItemKind::Mod(m), m;
/// Expect an [`ItemKind::TyAlias`] or panic.
#[track_caller]
pub fn expect_ty_alias(&self) -> (&'hir Ty<'hir>, &'hir Generics<'hir>) {
let ItemKind::TyAlias(ty, gen) = self.kind else { self.expect_failed("a type alias") };
(ty, gen)
}
expect_foreign_mod, (Abi, &'hir [ForeignItemRef]),
ItemKind::ForeignMod { abi, items }, (*abi, items);
/// Expect an [`ItemKind::OpaqueTy`] or panic.
#[track_caller]
pub fn expect_opaque_ty(&self) -> &OpaqueTy<'hir> {
let ItemKind::OpaqueTy(ty) = &self.kind else { self.expect_failed("an opaque type") };
ty
}
expect_global_asm, &'hir InlineAsm<'hir>, ItemKind::GlobalAsm(asm), asm;
/// Expect an [`ItemKind::Enum`] or panic.
#[track_caller]
pub fn expect_enum(&self) -> (&EnumDef<'hir>, &'hir Generics<'hir>) {
let ItemKind::Enum(def, gen) = &self.kind else { self.expect_failed("an enum") };
(def, gen)
}
expect_ty_alias, (&'hir Ty<'hir>, &'hir Generics<'hir>),
ItemKind::TyAlias(ty, gen), (ty, gen);
/// Expect an [`ItemKind::Struct`] or panic.
#[track_caller]
pub fn expect_struct(&self) -> (&VariantData<'hir>, &'hir Generics<'hir>) {
let ItemKind::Struct(data, gen) = &self.kind else { self.expect_failed("a struct") };
(data, gen)
}
expect_opaque_ty, &OpaqueTy<'hir>, ItemKind::OpaqueTy(ty), ty;
/// Expect an [`ItemKind::Union`] or panic.
#[track_caller]
pub fn expect_union(&self) -> (&VariantData<'hir>, &'hir Generics<'hir>) {
let ItemKind::Union(data, gen) = &self.kind else { self.expect_failed("a union") };
(data, gen)
}
expect_enum, (&EnumDef<'hir>, &'hir Generics<'hir>), ItemKind::Enum(def, gen), (def, gen);
/// Expect an [`ItemKind::Trait`] or panic.
#[track_caller]
pub fn expect_trait(
self,
) -> (IsAuto, Unsafety, &'hir Generics<'hir>, GenericBounds<'hir>, &'hir [TraitItemRef]) {
let ItemKind::Trait(is_auto, unsafety, gen, bounds, items) = self.kind else {
self.expect_failed("a trait")
};
(is_auto, unsafety, gen, bounds, items)
}
expect_struct, (&VariantData<'hir>, &'hir Generics<'hir>),
ItemKind::Struct(data, gen), (data, gen);
/// Expect an [`ItemKind::TraitAlias`] or panic.
#[track_caller]
pub fn expect_trait_alias(&self) -> (&'hir Generics<'hir>, GenericBounds<'hir>) {
let ItemKind::TraitAlias(gen, bounds) = self.kind else {
self.expect_failed("a trait alias")
};
(gen, bounds)
}
expect_union, (&VariantData<'hir>, &'hir Generics<'hir>),
ItemKind::Union(data, gen), (data, gen);
/// Expect an [`ItemKind::Impl`] or panic.
#[track_caller]
pub fn expect_impl(&self) -> &'hir Impl<'hir> {
let ItemKind::Impl(imp) = self.kind else { self.expect_failed("an impl") };
imp
}
expect_trait,
(IsAuto, Unsafety, &'hir Generics<'hir>, GenericBounds<'hir>, &'hir [TraitItemRef]),
ItemKind::Trait(is_auto, unsafety, gen, bounds, items),
(*is_auto, *unsafety, gen, bounds, items);
#[track_caller]
fn expect_failed(&self, expected: &'static str) -> ! {
panic!("expected {expected} item, found {self:?}")
expect_trait_alias, (&'hir Generics<'hir>, GenericBounds<'hir>),
ItemKind::TraitAlias(gen, bounds), (gen, bounds);
expect_impl, &'hir Impl<'hir>, ItemKind::Impl(imp), imp;
}
}
@ -3574,32 +3485,11 @@ impl<'hir> OwnerNode<'hir> {
}
}
pub fn expect_item(self) -> &'hir Item<'hir> {
match self {
OwnerNode::Item(n) => n,
_ => panic!(),
}
}
pub fn expect_foreign_item(self) -> &'hir ForeignItem<'hir> {
match self {
OwnerNode::ForeignItem(n) => n,
_ => panic!(),
}
}
pub fn expect_impl_item(self) -> &'hir ImplItem<'hir> {
match self {
OwnerNode::ImplItem(n) => n,
_ => panic!(),
}
}
pub fn expect_trait_item(self) -> &'hir TraitItem<'hir> {
match self {
OwnerNode::TraitItem(n) => n,
_ => panic!(),
}
expect_methods_self! {
expect_item, &'hir Item<'hir>, OwnerNode::Item(n), n;
expect_foreign_item, &'hir ForeignItem<'hir>, OwnerNode::ForeignItem(n), n;
expect_impl_item, &'hir ImplItem<'hir>, OwnerNode::ImplItem(n), n;
expect_trait_item, &'hir TraitItem<'hir>, OwnerNode::TraitItem(n), n;
}
}
@ -3852,190 +3742,33 @@ impl<'hir> Node<'hir> {
}
}
/// Expect a [`Node::Param`] or panic.
#[track_caller]
pub fn expect_param(self) -> &'hir Param<'hir> {
let Node::Param(this) = self else { self.expect_failed("a parameter") };
this
}
/// Expect a [`Node::Item`] or panic.
#[track_caller]
pub fn expect_item(self) -> &'hir Item<'hir> {
let Node::Item(this) = self else { self.expect_failed("a item") };
this
}
/// Expect a [`Node::ForeignItem`] or panic.
#[track_caller]
pub fn expect_foreign_item(self) -> &'hir ForeignItem<'hir> {
let Node::ForeignItem(this) = self else { self.expect_failed("a foreign item") };
this
}
/// Expect a [`Node::TraitItem`] or panic.
#[track_caller]
pub fn expect_trait_item(self) -> &'hir TraitItem<'hir> {
let Node::TraitItem(this) = self else { self.expect_failed("a trait item") };
this
}
/// Expect a [`Node::ImplItem`] or panic.
#[track_caller]
pub fn expect_impl_item(self) -> &'hir ImplItem<'hir> {
let Node::ImplItem(this) = self else { self.expect_failed("an implementation item") };
this
}
/// Expect a [`Node::Variant`] or panic.
#[track_caller]
pub fn expect_variant(self) -> &'hir Variant<'hir> {
let Node::Variant(this) = self else { self.expect_failed("a variant") };
this
}
/// Expect a [`Node::Field`] or panic.
#[track_caller]
pub fn expect_field(self) -> &'hir FieldDef<'hir> {
let Node::Field(this) = self else { self.expect_failed("a field definition") };
this
}
/// Expect a [`Node::AnonConst`] or panic.
#[track_caller]
pub fn expect_anon_const(self) -> &'hir AnonConst {
let Node::AnonConst(this) = self else { self.expect_failed("an anonymous constant") };
this
}
/// Expect a [`Node::ConstBlock`] or panic.
#[track_caller]
pub fn expect_inline_const(self) -> &'hir ConstBlock {
let Node::ConstBlock(this) = self else { self.expect_failed("an inline constant") };
this
}
/// Expect a [`Node::Expr`] or panic.
#[track_caller]
pub fn expect_expr(self) -> &'hir Expr<'hir> {
let Node::Expr(this) = self else { self.expect_failed("an expression") };
this
}
/// Expect a [`Node::ExprField`] or panic.
#[track_caller]
pub fn expect_expr_field(self) -> &'hir ExprField<'hir> {
let Node::ExprField(this) = self else { self.expect_failed("an expression field") };
this
}
/// Expect a [`Node::Stmt`] or panic.
#[track_caller]
pub fn expect_stmt(self) -> &'hir Stmt<'hir> {
let Node::Stmt(this) = self else { self.expect_failed("a statement") };
this
}
/// Expect a [`Node::PathSegment`] or panic.
#[track_caller]
pub fn expect_path_segment(self) -> &'hir PathSegment<'hir> {
let Node::PathSegment(this) = self else { self.expect_failed("a path segment") };
this
}
/// Expect a [`Node::Ty`] or panic.
#[track_caller]
pub fn expect_ty(self) -> &'hir Ty<'hir> {
let Node::Ty(this) = self else { self.expect_failed("a type") };
this
}
/// Expect a [`Node::TypeBinding`] or panic.
#[track_caller]
pub fn expect_type_binding(self) -> &'hir TypeBinding<'hir> {
let Node::TypeBinding(this) = self else { self.expect_failed("a type binding") };
this
}
/// Expect a [`Node::TraitRef`] or panic.
#[track_caller]
pub fn expect_trait_ref(self) -> &'hir TraitRef<'hir> {
let Node::TraitRef(this) = self else { self.expect_failed("a trait reference") };
this
}
/// Expect a [`Node::Pat`] or panic.
#[track_caller]
pub fn expect_pat(self) -> &'hir Pat<'hir> {
let Node::Pat(this) = self else { self.expect_failed("a pattern") };
this
}
/// Expect a [`Node::PatField`] or panic.
#[track_caller]
pub fn expect_pat_field(self) -> &'hir PatField<'hir> {
let Node::PatField(this) = self else { self.expect_failed("a pattern field") };
this
}
/// Expect a [`Node::Arm`] or panic.
#[track_caller]
pub fn expect_arm(self) -> &'hir Arm<'hir> {
let Node::Arm(this) = self else { self.expect_failed("an arm") };
this
}
/// Expect a [`Node::Block`] or panic.
#[track_caller]
pub fn expect_block(self) -> &'hir Block<'hir> {
let Node::Block(this) = self else { self.expect_failed("a block") };
this
}
/// Expect a [`Node::Local`] or panic.
#[track_caller]
pub fn expect_local(self) -> &'hir Local<'hir> {
let Node::Local(this) = self else { self.expect_failed("a local") };
this
}
/// Expect a [`Node::Ctor`] or panic.
#[track_caller]
pub fn expect_ctor(self) -> &'hir VariantData<'hir> {
let Node::Ctor(this) = self else { self.expect_failed("a constructor") };
this
}
/// Expect a [`Node::Lifetime`] or panic.
#[track_caller]
pub fn expect_lifetime(self) -> &'hir Lifetime {
let Node::Lifetime(this) = self else { self.expect_failed("a lifetime") };
this
}
/// Expect a [`Node::GenericParam`] or panic.
#[track_caller]
pub fn expect_generic_param(self) -> &'hir GenericParam<'hir> {
let Node::GenericParam(this) = self else { self.expect_failed("a generic parameter") };
this
}
/// Expect a [`Node::Crate`] or panic.
#[track_caller]
pub fn expect_crate(self) -> &'hir Mod<'hir> {
let Node::Crate(this) = self else { self.expect_failed("a crate") };
this
}
/// Expect a [`Node::Infer`] or panic.
#[track_caller]
pub fn expect_infer(self) -> &'hir InferArg {
let Node::Infer(this) = self else { self.expect_failed("an infer") };
this
}
#[track_caller]
fn expect_failed(&self, expected: &'static str) -> ! {
panic!("expected {expected} node, found {self:?}")
expect_methods_self! {
expect_param, &'hir Param<'hir>, Node::Param(n), n;
expect_item, &'hir Item<'hir>, Node::Item(n), n;
expect_foreign_item, &'hir ForeignItem<'hir>, Node::ForeignItem(n), n;
expect_trait_item, &'hir TraitItem<'hir>, Node::TraitItem(n), n;
expect_impl_item, &'hir ImplItem<'hir>, Node::ImplItem(n), n;
expect_variant, &'hir Variant<'hir>, Node::Variant(n), n;
expect_field, &'hir FieldDef<'hir>, Node::Field(n), n;
expect_anon_const, &'hir AnonConst, Node::AnonConst(n), n;
expect_inline_const, &'hir ConstBlock, Node::ConstBlock(n), n;
expect_expr, &'hir Expr<'hir>, Node::Expr(n), n;
expect_expr_field, &'hir ExprField<'hir>, Node::ExprField(n), n;
expect_stmt, &'hir Stmt<'hir>, Node::Stmt(n), n;
expect_path_segment, &'hir PathSegment<'hir>, Node::PathSegment(n), n;
expect_ty, &'hir Ty<'hir>, Node::Ty(n), n;
expect_type_binding, &'hir TypeBinding<'hir>, Node::TypeBinding(n), n;
expect_trait_ref, &'hir TraitRef<'hir>, Node::TraitRef(n), n;
expect_pat, &'hir Pat<'hir>, Node::Pat(n), n;
expect_pat_field, &'hir PatField<'hir>, Node::PatField(n), n;
expect_arm, &'hir Arm<'hir>, Node::Arm(n), n;
expect_block, &'hir Block<'hir>, Node::Block(n), n;
expect_local, &'hir Local<'hir>, Node::Local(n), n;
expect_ctor, &'hir VariantData<'hir>, Node::Ctor(n), n;
expect_lifetime, &'hir Lifetime, Node::Lifetime(n), n;
expect_generic_param, &'hir GenericParam<'hir>, Node::GenericParam(n), n;
expect_crate, &'hir Mod<'hir>, Node::Crate(n), n;
expect_infer, &'hir InferArg, Node::Infer(n), n;
}
}