1use rustc_ast::attr::AttributeExt;
11use rustc_data_structures::fx::FxIndexMap;
12use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
13use rustc_macros::{Decodable, Encodable, HashStable_Generic};
14use rustc_span::{Span, Symbol, kw, sym};
15
16use crate::def_id::DefId;
17use crate::{MethodKind, Target};
18
19#[derive(HashStable_Generic, Debug)]
22pub struct LanguageItems {
23 items: [Option<DefId>; std::mem::variant_count::<LangItem>()],
26 reverse_items: FxIndexMap<DefId, LangItem>,
27 pub missing: Vec<LangItem>,
29}
30
31impl LanguageItems {
32 pub fn new() -> Self {
34 Self {
35 items: [None; std::mem::variant_count::<LangItem>()],
36 reverse_items: FxIndexMap::default(),
37 missing: Vec::new(),
38 }
39 }
40
41 pub fn get(&self, item: LangItem) -> Option<DefId> {
42 self.items[item as usize]
43 }
44
45 pub fn set(&mut self, item: LangItem, def_id: DefId) {
46 self.items[item as usize] = Some(def_id);
47 let preexisting = self.reverse_items.insert(def_id, item);
48
49 if let Some(preexisting) = preexisting {
51 panic!(
52 "For the bijection of LangItem <=> DefId to work,\
53 one item DefId may only be assigned one LangItem. \
54 Separate the LangItem definitions for {item:?} and {preexisting:?}."
55 );
56 }
57 }
58
59 pub fn from_def_id(&self, def_id: DefId) -> Option<LangItem> {
60 self.reverse_items.get(&def_id).copied()
61 }
62
63 pub fn iter(&self) -> impl Iterator<Item = (LangItem, DefId)> {
64 self.items
65 .iter()
66 .enumerate()
67 .filter_map(|(i, id)| id.map(|id| (LangItem::from_u32(i as u32).unwrap(), id)))
68 }
69}
70
71macro_rules! language_item_table {
74 (
75 $( $(#[$attr:meta])* $variant:ident, $module:ident :: $name:ident, $method:ident, $target:expr, $generics:expr; )*
76 ) => {
77 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Encodable, Decodable)]
79 pub enum LangItem {
80 $(
81 #[doc = concat!("The `", stringify!($name), "` lang item.")]
82 $(#[$attr])*
83 $variant,
84 )*
85 }
86
87 impl LangItem {
88 fn from_u32(u: u32) -> Option<LangItem> {
89 $(if u == LangItem::$variant as u32 {
93 return Some(LangItem::$variant)
94 })*
95 None
96 }
97
98 pub fn name(self) -> Symbol {
102 match self {
103 $( LangItem::$variant => $module::$name, )*
104 }
105 }
106
107 pub fn from_name(name: Symbol) -> Option<Self> {
109 match name {
110 $( $module::$name => Some(LangItem::$variant), )*
111 _ => None,
112 }
113 }
114
115 pub fn variant_name(self) -> &'static str {
118 match self {
119 $( LangItem::$variant => stringify!($variant), )*
120 }
121 }
122
123 pub fn target(self) -> Target {
124 match self {
125 $( LangItem::$variant => $target, )*
126 }
127 }
128
129 pub fn required_generics(&self) -> GenericRequirement {
130 match self {
131 $( LangItem::$variant => $generics, )*
132 }
133 }
134 }
135
136 impl LanguageItems {
137 $(
138 #[doc = concat!("Returns the [`DefId`] of the `", stringify!($name), "` lang item if it is defined.")]
139 pub fn $method(&self) -> Option<DefId> {
140 self.items[LangItem::$variant as usize]
141 }
142 )*
143 }
144 }
145}
146
147impl<CTX> HashStable<CTX> for LangItem {
148 fn hash_stable(&self, _: &mut CTX, hasher: &mut StableHasher) {
149 ::std::hash::Hash::hash(self, hasher);
150 }
151}
152
153pub fn extract(attrs: &[impl AttributeExt]) -> Option<(Symbol, Span)> {
156 attrs.iter().find_map(|attr| {
157 Some(match attr {
158 _ if attr.has_name(sym::lang) => (attr.value_str()?, attr.span()),
159 _ if attr.has_name(sym::panic_handler) => (sym::panic_impl, attr.span()),
160 _ => return None,
161 })
162 })
163}
164
165language_item_table! {
166Sized, sym::sized, sized_trait, Target::Trait, GenericRequirement::Exact(0);
168 Unsize, sym::unsize, unsize_trait, Target::Trait, GenericRequirement::Minimum(1);
169 StructuralPeq, sym::structural_peq, structural_peq_trait, Target::Trait, GenericRequirement::None;
171 Copy, sym::copy, copy_trait, Target::Trait, GenericRequirement::Exact(0);
172 Clone, sym::clone, clone_trait, Target::Trait, GenericRequirement::None;
173 CloneFn, sym::clone_fn, clone_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
174 UseCloned, sym::use_cloned, use_cloned_trait, Target::Trait, GenericRequirement::None;
175 Sync, sym::sync, sync_trait, Target::Trait, GenericRequirement::Exact(0);
176 DiscriminantKind, sym::discriminant_kind, discriminant_kind_trait, Target::Trait, GenericRequirement::None;
177 Discriminant, sym::discriminant_type, discriminant_type, Target::AssocTy, GenericRequirement::None;
179
180 PointeeTrait, sym::pointee_trait, pointee_trait, Target::Trait, GenericRequirement::None;
181 Metadata, sym::metadata_type, metadata_type, Target::AssocTy, GenericRequirement::None;
182 DynMetadata, sym::dyn_metadata, dyn_metadata, Target::Struct, GenericRequirement::None;
183
184 Freeze, sym::freeze, freeze_trait, Target::Trait, GenericRequirement::Exact(0);
185 UnsafeUnpin, sym::unsafe_unpin, unsafe_unpin_trait, Target::Trait, GenericRequirement::Exact(0);
186
187 FnPtrTrait, sym::fn_ptr_trait, fn_ptr_trait, Target::Trait, GenericRequirement::Exact(0);
188 FnPtrAddr, sym::fn_ptr_addr, fn_ptr_addr, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
189
190 Drop, sym::drop, drop_trait, Target::Trait, GenericRequirement::None;
191 Destruct, sym::destruct, destruct_trait, Target::Trait, GenericRequirement::None;
192 AsyncDrop, sym::async_drop, async_drop_trait, Target::Trait, GenericRequirement::None;
193 AsyncDropInPlace, sym::async_drop_in_place, async_drop_in_place_fn, Target::Fn, GenericRequirement::Exact(1);
194
195 CoerceUnsized, sym::coerce_unsized, coerce_unsized_trait, Target::Trait, GenericRequirement::Minimum(1);
196 DispatchFromDyn, sym::dispatch_from_dyn, dispatch_from_dyn_trait, Target::Trait, GenericRequirement::Minimum(1);
197
198 TransmuteOpts, sym::transmute_opts, transmute_opts, Target::Struct, GenericRequirement::Exact(0);
200 TransmuteTrait, sym::transmute_trait, transmute_trait, Target::Trait, GenericRequirement::Exact(2);
201
202 Add, sym::add, add_trait, Target::Trait, GenericRequirement::Exact(1);
203 Sub, sym::sub, sub_trait, Target::Trait, GenericRequirement::Exact(1);
204 Mul, sym::mul, mul_trait, Target::Trait, GenericRequirement::Exact(1);
205 Div, sym::div, div_trait, Target::Trait, GenericRequirement::Exact(1);
206 Rem, sym::rem, rem_trait, Target::Trait, GenericRequirement::Exact(1);
207 Neg, sym::neg, neg_trait, Target::Trait, GenericRequirement::Exact(0);
208 Not, sym::not, not_trait, Target::Trait, GenericRequirement::Exact(0);
209 BitXor, sym::bitxor, bitxor_trait, Target::Trait, GenericRequirement::Exact(1);
210 BitAnd, sym::bitand, bitand_trait, Target::Trait, GenericRequirement::Exact(1);
211 BitOr, sym::bitor, bitor_trait, Target::Trait, GenericRequirement::Exact(1);
212 Shl, sym::shl, shl_trait, Target::Trait, GenericRequirement::Exact(1);
213 Shr, sym::shr, shr_trait, Target::Trait, GenericRequirement::Exact(1);
214 AddAssign, sym::add_assign, add_assign_trait, Target::Trait, GenericRequirement::Exact(1);
215 SubAssign, sym::sub_assign, sub_assign_trait, Target::Trait, GenericRequirement::Exact(1);
216 MulAssign, sym::mul_assign, mul_assign_trait, Target::Trait, GenericRequirement::Exact(1);
217 DivAssign, sym::div_assign, div_assign_trait, Target::Trait, GenericRequirement::Exact(1);
218 RemAssign, sym::rem_assign, rem_assign_trait, Target::Trait, GenericRequirement::Exact(1);
219 BitXorAssign, sym::bitxor_assign, bitxor_assign_trait, Target::Trait, GenericRequirement::Exact(1);
220 BitAndAssign, sym::bitand_assign, bitand_assign_trait, Target::Trait, GenericRequirement::Exact(1);
221 BitOrAssign, sym::bitor_assign, bitor_assign_trait, Target::Trait, GenericRequirement::Exact(1);
222 ShlAssign, sym::shl_assign, shl_assign_trait, Target::Trait, GenericRequirement::Exact(1);
223 ShrAssign, sym::shr_assign, shr_assign_trait, Target::Trait, GenericRequirement::Exact(1);
224 Index, sym::index, index_trait, Target::Trait, GenericRequirement::Exact(1);
225 IndexMut, sym::index_mut, index_mut_trait, Target::Trait, GenericRequirement::Exact(1);
226
227 UnsafeCell, sym::unsafe_cell, unsafe_cell_type, Target::Struct, GenericRequirement::None;
228 UnsafePinned, sym::unsafe_pinned, unsafe_pinned_type, Target::Struct, GenericRequirement::None;
229
230 VaList, sym::va_list, va_list, Target::Struct, GenericRequirement::None;
231
232 Deref, sym::deref, deref_trait, Target::Trait, GenericRequirement::Exact(0);
233 DerefMut, sym::deref_mut, deref_mut_trait, Target::Trait, GenericRequirement::Exact(0);
234 DerefPure, sym::deref_pure, deref_pure_trait, Target::Trait, GenericRequirement::Exact(0);
235 DerefTarget, sym::deref_target, deref_target, Target::AssocTy, GenericRequirement::None;
236 Receiver, sym::receiver, receiver_trait, Target::Trait, GenericRequirement::None;
237 ReceiverTarget, sym::receiver_target, receiver_target, Target::AssocTy, GenericRequirement::None;
238 LegacyReceiver, sym::legacy_receiver, legacy_receiver_trait, Target::Trait, GenericRequirement::None;
239
240 Fn, kw::Fn, fn_trait, Target::Trait, GenericRequirement::Exact(1);
241 FnMut, sym::fn_mut, fn_mut_trait, Target::Trait, GenericRequirement::Exact(1);
242 FnOnce, sym::fn_once, fn_once_trait, Target::Trait, GenericRequirement::Exact(1);
243
244 AsyncFn, sym::async_fn, async_fn_trait, Target::Trait, GenericRequirement::Exact(1);
245 AsyncFnMut, sym::async_fn_mut, async_fn_mut_trait, Target::Trait, GenericRequirement::Exact(1);
246 AsyncFnOnce, sym::async_fn_once, async_fn_once_trait, Target::Trait, GenericRequirement::Exact(1);
247 AsyncFnOnceOutput, sym::async_fn_once_output, async_fn_once_output, Target::AssocTy, GenericRequirement::Exact(1);
248 CallOnceFuture, sym::call_once_future, call_once_future, Target::AssocTy, GenericRequirement::Exact(1);
249 CallRefFuture, sym::call_ref_future, call_ref_future, Target::AssocTy, GenericRequirement::Exact(2);
250 AsyncFnKindHelper, sym::async_fn_kind_helper, async_fn_kind_helper, Target::Trait, GenericRequirement::Exact(1);
251 AsyncFnKindUpvars, sym::async_fn_kind_upvars, async_fn_kind_upvars, Target::AssocTy, GenericRequirement::Exact(5);
252
253 FnOnceOutput, sym::fn_once_output, fn_once_output, Target::AssocTy, GenericRequirement::None;
254
255 Iterator, sym::iterator, iterator_trait, Target::Trait, GenericRequirement::Exact(0);
256 FusedIterator, sym::fused_iterator, fused_iterator_trait, Target::Trait, GenericRequirement::Exact(0);
257 Future, sym::future_trait, future_trait, Target::Trait, GenericRequirement::Exact(0);
258 FutureOutput, sym::future_output, future_output, Target::AssocTy, GenericRequirement::Exact(0);
259 AsyncIterator, sym::async_iterator, async_iterator_trait, Target::Trait, GenericRequirement::Exact(0);
260
261 CoroutineState, sym::coroutine_state, coroutine_state, Target::Enum, GenericRequirement::None;
262 Coroutine, sym::coroutine, coroutine_trait, Target::Trait, GenericRequirement::Exact(1);
263 CoroutineReturn, sym::coroutine_return, coroutine_return, Target::AssocTy, GenericRequirement::Exact(1);
264 CoroutineYield, sym::coroutine_yield, coroutine_yield, Target::AssocTy, GenericRequirement::Exact(1);
265 CoroutineResume, sym::coroutine_resume, coroutine_resume, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
266
267 Unpin, sym::unpin, unpin_trait, Target::Trait, GenericRequirement::None;
268 Pin, sym::pin, pin_type, Target::Struct, GenericRequirement::None;
269
270 OrderingEnum, sym::Ordering, ordering_enum, Target::Enum, GenericRequirement::Exact(0);
271 PartialEq, sym::eq, eq_trait, Target::Trait, GenericRequirement::Exact(1);
272 PartialOrd, sym::partial_ord, partial_ord_trait, Target::Trait, GenericRequirement::Exact(1);
273 CVoid, sym::c_void, c_void, Target::Enum, GenericRequirement::None;
274
275 Panic, sym::panic, panic_fn, Target::Fn, GenericRequirement::Exact(0);
283 PanicNounwind, sym::panic_nounwind, panic_nounwind, Target::Fn, GenericRequirement::Exact(0);
284 PanicFmt, sym::panic_fmt, panic_fmt, Target::Fn, GenericRequirement::None;
285 ConstPanicFmt, sym::const_panic_fmt, const_panic_fmt, Target::Fn, GenericRequirement::None;
286 PanicBoundsCheck, sym::panic_bounds_check, panic_bounds_check_fn, Target::Fn, GenericRequirement::Exact(0);
287 PanicMisalignedPointerDereference, sym::panic_misaligned_pointer_dereference, panic_misaligned_pointer_dereference_fn, Target::Fn, GenericRequirement::Exact(0);
288 PanicInfo, sym::panic_info, panic_info, Target::Struct, GenericRequirement::None;
289 PanicLocation, sym::panic_location, panic_location, Target::Struct, GenericRequirement::None;
290 PanicImpl, sym::panic_impl, panic_impl, Target::Fn, GenericRequirement::None;
291 PanicCannotUnwind, sym::panic_cannot_unwind, panic_cannot_unwind, Target::Fn, GenericRequirement::Exact(0);
292 PanicInCleanup, sym::panic_in_cleanup, panic_in_cleanup, Target::Fn, GenericRequirement::Exact(0);
293 PanicAddOverflow, sym::panic_const_add_overflow, panic_const_add_overflow, Target::Fn, GenericRequirement::None;
295 PanicSubOverflow, sym::panic_const_sub_overflow, panic_const_sub_overflow, Target::Fn, GenericRequirement::None;
296 PanicMulOverflow, sym::panic_const_mul_overflow, panic_const_mul_overflow, Target::Fn, GenericRequirement::None;
297 PanicDivOverflow, sym::panic_const_div_overflow, panic_const_div_overflow, Target::Fn, GenericRequirement::None;
298 PanicRemOverflow, sym::panic_const_rem_overflow, panic_const_rem_overflow, Target::Fn, GenericRequirement::None;
299 PanicNegOverflow, sym::panic_const_neg_overflow, panic_const_neg_overflow, Target::Fn, GenericRequirement::None;
300 PanicShrOverflow, sym::panic_const_shr_overflow, panic_const_shr_overflow, Target::Fn, GenericRequirement::None;
301 PanicShlOverflow, sym::panic_const_shl_overflow, panic_const_shl_overflow, Target::Fn, GenericRequirement::None;
302 PanicDivZero, sym::panic_const_div_by_zero, panic_const_div_by_zero, Target::Fn, GenericRequirement::None;
303 PanicRemZero, sym::panic_const_rem_by_zero, panic_const_rem_by_zero, Target::Fn, GenericRequirement::None;
304 PanicCoroutineResumed, sym::panic_const_coroutine_resumed, panic_const_coroutine_resumed, Target::Fn, GenericRequirement::None;
305 PanicAsyncFnResumed, sym::panic_const_async_fn_resumed, panic_const_async_fn_resumed, Target::Fn, GenericRequirement::None;
306 PanicAsyncGenFnResumed, sym::panic_const_async_gen_fn_resumed, panic_const_async_gen_fn_resumed, Target::Fn, GenericRequirement::None;
307 PanicGenFnNone, sym::panic_const_gen_fn_none, panic_const_gen_fn_none, Target::Fn, GenericRequirement::None;
308 PanicCoroutineResumedPanic, sym::panic_const_coroutine_resumed_panic, panic_const_coroutine_resumed_panic, Target::Fn, GenericRequirement::None;
309 PanicAsyncFnResumedPanic, sym::panic_const_async_fn_resumed_panic, panic_const_async_fn_resumed_panic, Target::Fn, GenericRequirement::None;
310 PanicAsyncGenFnResumedPanic, sym::panic_const_async_gen_fn_resumed_panic, panic_const_async_gen_fn_resumed_panic, Target::Fn, GenericRequirement::None;
311 PanicGenFnNonePanic, sym::panic_const_gen_fn_none_panic, panic_const_gen_fn_none_panic, Target::Fn, GenericRequirement::None;
312 PanicNullPointerDereference, sym::panic_null_pointer_dereference, panic_null_pointer_dereference, Target::Fn, GenericRequirement::None;
313 PanicCoroutineResumedDrop, sym::panic_const_coroutine_resumed_drop, panic_const_coroutine_resumed_drop, Target::Fn, GenericRequirement::None;
314 PanicAsyncFnResumedDrop, sym::panic_const_async_fn_resumed_drop, panic_const_async_fn_resumed_drop, Target::Fn, GenericRequirement::None;
315 PanicAsyncGenFnResumedDrop, sym::panic_const_async_gen_fn_resumed_drop, panic_const_async_gen_fn_resumed_drop, Target::Fn, GenericRequirement::None;
316 PanicGenFnNoneDrop, sym::panic_const_gen_fn_none_drop, panic_const_gen_fn_none_drop, Target::Fn, GenericRequirement::None;
317 BeginPanic, sym::begin_panic, begin_panic_fn, Target::Fn, GenericRequirement::None;
319
320 FormatArgument, sym::format_argument, format_argument, Target::Struct, GenericRequirement::None;
322 FormatArguments, sym::format_arguments, format_arguments, Target::Struct, GenericRequirement::None;
323 FormatCount, sym::format_count, format_count, Target::Enum, GenericRequirement::None;
324 FormatPlaceholder, sym::format_placeholder, format_placeholder, Target::Struct, GenericRequirement::None;
325 FormatUnsafeArg, sym::format_unsafe_arg, format_unsafe_arg, Target::Struct, GenericRequirement::None;
326
327 ExchangeMalloc, sym::exchange_malloc, exchange_malloc_fn, Target::Fn, GenericRequirement::None;
328 DropInPlace, sym::drop_in_place, drop_in_place_fn, Target::Fn, GenericRequirement::Minimum(1);
329 AllocLayout, sym::alloc_layout, alloc_layout, Target::Struct, GenericRequirement::None;
330
331 Start, sym::start, start_fn, Target::Fn, GenericRequirement::Exact(1);
336
337 EhPersonality, sym::eh_personality, eh_personality, Target::Fn, GenericRequirement::None;
338 EhCatchTypeinfo, sym::eh_catch_typeinfo, eh_catch_typeinfo, Target::Static, GenericRequirement::None;
339
340 OwnedBox, sym::owned_box, owned_box, Target::Struct, GenericRequirement::Minimum(1);
341 GlobalAlloc, sym::global_alloc_ty, global_alloc_ty, Target::Struct, GenericRequirement::None;
342
343 PtrUnique, sym::ptr_unique, ptr_unique, Target::Struct, GenericRequirement::Exact(1);
345
346 PhantomData, sym::phantom_data, phantom_data, Target::Struct, GenericRequirement::Exact(1);
347
348 ManuallyDrop, sym::manually_drop, manually_drop, Target::Struct, GenericRequirement::None;
349 BikeshedGuaranteedNoDrop, sym::bikeshed_guaranteed_no_drop, bikeshed_guaranteed_no_drop, Target::Trait, GenericRequirement::Exact(0);
350
351 MaybeUninit, sym::maybe_uninit, maybe_uninit, Target::Union, GenericRequirement::None;
352
353 Termination, sym::termination, termination, Target::Trait, GenericRequirement::None;
354
355 Try, sym::Try, try_trait, Target::Trait, GenericRequirement::None;
356
357 Tuple, sym::tuple_trait, tuple_trait, Target::Trait, GenericRequirement::Exact(0);
358
359 SliceLen, sym::slice_len_fn, slice_len_fn, Target::Method(MethodKind::Inherent), GenericRequirement::None;
360
361 TryTraitFromResidual, sym::from_residual, from_residual_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
363 TryTraitFromOutput, sym::from_output, from_output_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
364 TryTraitBranch, sym::branch, branch_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
365 TryTraitFromYeet, sym::from_yeet, from_yeet_fn, Target::Fn, GenericRequirement::None;
366
367 PointerLike, sym::pointer_like, pointer_like, Target::Trait, GenericRequirement::Exact(0);
368
369 CoercePointeeValidated, sym::coerce_pointee_validated, coerce_pointee_validated_trait, Target::Trait, GenericRequirement::Exact(0);
370
371 ConstParamTy, sym::const_param_ty, const_param_ty_trait, Target::Trait, GenericRequirement::Exact(0);
372 UnsizedConstParamTy, sym::unsized_const_param_ty, unsized_const_param_ty_trait, Target::Trait, GenericRequirement::Exact(0);
373
374 Poll, sym::Poll, poll, Target::Enum, GenericRequirement::None;
375 PollReady, sym::Ready, poll_ready_variant, Target::Variant, GenericRequirement::None;
376 PollPending, sym::Pending, poll_pending_variant, Target::Variant, GenericRequirement::None;
377
378 AsyncGenReady, sym::AsyncGenReady, async_gen_ready, Target::Method(MethodKind::Inherent), GenericRequirement::Exact(1);
379 AsyncGenPending, sym::AsyncGenPending, async_gen_pending, Target::AssocConst, GenericRequirement::Exact(1);
380 AsyncGenFinished, sym::AsyncGenFinished, async_gen_finished, Target::AssocConst, GenericRequirement::Exact(1);
381
382 ResumeTy, sym::ResumeTy, resume_ty, Target::Struct, GenericRequirement::None;
385 GetContext, sym::get_context, get_context_fn, Target::Fn, GenericRequirement::None;
386
387 Context, sym::Context, context, Target::Struct, GenericRequirement::None;
388 FuturePoll, sym::poll, future_poll_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
389
390 AsyncIteratorPollNext, sym::async_iterator_poll_next, async_iterator_poll_next, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::Exact(0);
391 IntoAsyncIterIntoIter, sym::into_async_iter_into_iter, into_async_iter_into_iter, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::Exact(0);
392
393 Option, sym::Option, option_type, Target::Enum, GenericRequirement::None;
394 OptionSome, sym::Some, option_some_variant, Target::Variant, GenericRequirement::None;
395 OptionNone, sym::None, option_none_variant, Target::Variant, GenericRequirement::None;
396
397 ResultOk, sym::Ok, result_ok_variant, Target::Variant, GenericRequirement::None;
398 ResultErr, sym::Err, result_err_variant, Target::Variant, GenericRequirement::None;
399
400 ControlFlowContinue, sym::Continue, cf_continue_variant, Target::Variant, GenericRequirement::None;
401 ControlFlowBreak, sym::Break, cf_break_variant, Target::Variant, GenericRequirement::None;
402
403 IntoFutureIntoFuture, sym::into_future, into_future_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
404 IntoIterIntoIter, sym::into_iter, into_iter_fn, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::None;
405 IteratorNext, sym::next, next_fn, Target::Method(MethodKind::Trait { body: false}), GenericRequirement::None;
406
407 PinNewUnchecked, sym::new_unchecked, new_unchecked_fn, Target::Method(MethodKind::Inherent), GenericRequirement::None;
408
409 RangeFrom, sym::RangeFrom, range_from_struct, Target::Struct, GenericRequirement::None;
410 RangeFull, sym::RangeFull, range_full_struct, Target::Struct, GenericRequirement::None;
411 RangeInclusiveStruct, sym::RangeInclusive, range_inclusive_struct, Target::Struct, GenericRequirement::None;
412 RangeInclusiveNew, sym::range_inclusive_new, range_inclusive_new_method, Target::Method(MethodKind::Inherent), GenericRequirement::None;
413 Range, sym::Range, range_struct, Target::Struct, GenericRequirement::None;
414 RangeToInclusive, sym::RangeToInclusive, range_to_inclusive_struct, Target::Struct, GenericRequirement::None;
415 RangeTo, sym::RangeTo, range_to_struct, Target::Struct, GenericRequirement::None;
416 RangeMax, sym::RangeMax, range_max, Target::AssocConst, GenericRequirement::Exact(0);
417 RangeMin, sym::RangeMin, range_min, Target::AssocConst, GenericRequirement::Exact(0);
418 RangeSub, sym::RangeSub, range_sub, Target::Method(MethodKind::Trait { body: false }), GenericRequirement::Exact(0);
419
420 RangeFromCopy, sym::RangeFromCopy, range_from_copy_struct, Target::Struct, GenericRequirement::None;
422 RangeCopy, sym::RangeCopy, range_copy_struct, Target::Struct, GenericRequirement::None;
423 RangeInclusiveCopy, sym::RangeInclusiveCopy, range_inclusive_copy_struct, Target::Struct, GenericRequirement::None;
424
425 String, sym::String, string, Target::Struct, GenericRequirement::None;
426 CStr, sym::CStr, c_str, Target::Struct, GenericRequirement::None;
427
428 ContractBuildCheckEnsures, sym::contract_build_check_ensures, contract_build_check_ensures_fn, Target::Fn, GenericRequirement::None;
430 ContractCheckRequires, sym::contract_check_requires, contract_check_requires_fn, Target::Fn, GenericRequirement::None;
431
432 DefaultTrait4, sym::default_trait4, default_trait4_trait, Target::Trait, GenericRequirement::None;
434 DefaultTrait3, sym::default_trait3, default_trait3_trait, Target::Trait, GenericRequirement::None;
435 DefaultTrait2, sym::default_trait2, default_trait2_trait, Target::Trait, GenericRequirement::None;
436 DefaultTrait1, sym::default_trait1, default_trait1_trait, Target::Trait, GenericRequirement::None;
437
438 ContractCheckEnsures, sym::contract_check_ensures, contract_check_ensures_fn, Target::Fn, GenericRequirement::None;
439}
440
441pub enum GenericRequirement {
443 None,
445 Minimum(usize),
447 Exact(usize),
449}
450
451pub static FN_TRAITS: &'static [LangItem] = &[LangItem::Fn, LangItem::FnMut, LangItem::FnOnce];
452
453pub static OPERATORS: &'static [LangItem] = &[
454 LangItem::Add,
455 LangItem::Sub,
456 LangItem::Mul,
457 LangItem::Div,
458 LangItem::Rem,
459 LangItem::Neg,
460 LangItem::Not,
461 LangItem::BitXor,
462 LangItem::BitAnd,
463 LangItem::BitOr,
464 LangItem::Shl,
465 LangItem::Shr,
466 LangItem::AddAssign,
467 LangItem::SubAssign,
468 LangItem::MulAssign,
469 LangItem::DivAssign,
470 LangItem::RemAssign,
471 LangItem::BitXorAssign,
472 LangItem::BitAndAssign,
473 LangItem::BitOrAssign,
474 LangItem::ShlAssign,
475 LangItem::ShrAssign,
476 LangItem::Index,
477 LangItem::IndexMut,
478 LangItem::PartialEq,
479 LangItem::PartialOrd,
480];
481
482pub static BINARY_OPERATORS: &'static [LangItem] = &[
483 LangItem::Add,
484 LangItem::Sub,
485 LangItem::Mul,
486 LangItem::Div,
487 LangItem::Rem,
488 LangItem::BitXor,
489 LangItem::BitAnd,
490 LangItem::BitOr,
491 LangItem::Shl,
492 LangItem::Shr,
493 LangItem::AddAssign,
494 LangItem::SubAssign,
495 LangItem::MulAssign,
496 LangItem::DivAssign,
497 LangItem::RemAssign,
498 LangItem::BitXorAssign,
499 LangItem::BitAndAssign,
500 LangItem::BitOrAssign,
501 LangItem::ShlAssign,
502 LangItem::ShrAssign,
503 LangItem::Index,
504 LangItem::IndexMut,
505 LangItem::PartialEq,
506 LangItem::PartialOrd,
507];