flux_fhir_analysis/
lib.rs

1#![feature(rustc_private, box_patterns, if_let_guard, once_cell_try, never_type)]
2
3extern crate rustc_abi;
4extern crate rustc_ast;
5extern crate rustc_data_structures;
6extern crate rustc_errors;
7extern crate rustc_hir;
8extern crate rustc_index;
9extern crate rustc_infer;
10extern crate rustc_middle;
11extern crate rustc_span;
12extern crate rustc_trait_selection;
13extern crate rustc_type_ir;
14
15mod conv;
16mod wf;
17use std::{iter, rc::Rc};
18
19use conv::{AfterSortck, ConvPhase, struct_compat};
20use flux_common::{bug, dbg, iter::IterExt, result::ResultExt};
21use flux_config as config;
22use flux_errors::Errors;
23use flux_macros::fluent_messages;
24use flux_middle::{
25    def_id::{FluxDefId, FluxId, MaybeExternId},
26    fhir::{
27        self, ForeignItem, ForeignItemKind, ImplItem, ImplItemKind, Item, ItemKind, TraitItem,
28        TraitItemKind,
29    },
30    global_env::GlobalEnv,
31    queries::{Providers, QueryResult},
32    query_bug,
33    rty::{
34        self, AssocReft, Binder, WfckResults,
35        fold::TypeFoldable,
36        refining::{self, Refiner},
37    },
38};
39use flux_rustc_bridge::lowering::Lower;
40use itertools::Itertools;
41use rustc_abi::FIRST_VARIANT;
42use rustc_data_structures::unord::UnordMap;
43use rustc_errors::ErrorGuaranteed;
44use rustc_hir::{
45    OwnerId,
46    def::{CtorOf, DefKind},
47    def_id::{DefId, LocalDefId},
48};
49use rustc_span::Span;
50
51fluent_messages! { "../locales/en-US.ftl" }
52
53pub fn provide(providers: &mut Providers) {
54    providers.normalized_defns = normalized_defns;
55    providers.func_sort = func_sort;
56    providers.func_span = flux_def_ident_span;
57    providers.qualifiers = qualifiers;
58    providers.prim_rel = prim_rel;
59    providers.adt_sort_def_of = adt_sort_def_of;
60    providers.check_wf = check_wf;
61    providers.adt_def = adt_def;
62    providers.constant_info = constant_info;
63    providers.type_of = type_of;
64    providers.variants_of = variants_of;
65    providers.fn_sig = fn_sig;
66    providers.generics_of = generics_of;
67    providers.refinement_generics_of = refinement_generics_of;
68    providers.predicates_of = predicates_of;
69    providers.assoc_refinements_of = assoc_refinements_of;
70    providers.sort_of_assoc_reft = sort_of_assoc_reft;
71    providers.assoc_refinement_body = assoc_refinement_body;
72    providers.default_assoc_refinement_body = default_assoc_refinement_body;
73    providers.item_bounds = item_bounds;
74}
75
76fn adt_sort_def_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::AdtSortDef> {
77    let kind = genv.fhir_expect_refinement_kind(def_id.local_id())?;
78    conv::conv_adt_sort_def(genv, def_id, kind)
79}
80
81fn func_sort(genv: GlobalEnv, def_id: FluxId<MaybeExternId>) -> rty::PolyFuncSort {
82    let func = genv.fhir_spec_func_body(def_id.local_id()).unwrap();
83    match conv::conv_func_decl(genv, func).emit(&genv) {
84        Ok(normalized) => normalized,
85        Err(err) => {
86            genv.sess().abort(err);
87        }
88    }
89}
90
91fn flux_def_ident_span(genv: GlobalEnv, def_id: FluxId<MaybeExternId>) -> Span {
92    genv.fhir_spec_func_body(def_id.local_id())
93        .unwrap()
94        .ident_span
95}
96
97fn normalized_defns(genv: GlobalEnv) -> rty::NormalizedDefns {
98    match try_normalized_defns(genv) {
99        Ok(normalized) => normalized,
100        Err(err) => {
101            genv.sess().abort(err);
102        }
103    }
104}
105
106fn try_normalized_defns(genv: GlobalEnv) -> Result<rty::NormalizedDefns, ErrorGuaranteed> {
107    let mut defns = vec![];
108
109    // Collect and emit all errors
110    let mut errors = Errors::new(genv.sess());
111    for (_, item) in genv.fhir_iter_flux_items() {
112        let fhir::FluxItem::Func(func) = item else { continue };
113        let Some(wfckresults) = wf::check_flux_item(genv, item).collect_err(&mut errors) else {
114            continue;
115        };
116        let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
117        let Ok(defn) = cx.conv_defn(func).emit(&errors) else {
118            continue;
119        };
120
121        if let Some(defn) = defn {
122            defns.push((func.def_id, defn, func.hide));
123        }
124    }
125    errors.into_result()?;
126
127    let defns = rty::NormalizedDefns::new(genv, &defns)
128        .map_err(|cycle| {
129            let span = genv
130                .fhir_spec_func_body(cycle[0])
131                .unwrap()
132                .body
133                .unwrap()
134                .span;
135            errors::DefinitionCycle::new(span, cycle)
136        })
137        .emit(&genv)?;
138
139    Ok(defns)
140}
141
142fn qualifiers(genv: GlobalEnv) -> QueryResult<Vec<rty::Qualifier>> {
143    genv.fhir_qualifiers()
144        .map(|qualifier| {
145            let wfckresults = wf::check_flux_item(genv, fhir::FluxItem::Qualifier(qualifier))?;
146            Ok(AfterSortck::new(genv, &wfckresults)
147                .into_conv_ctxt()
148                .conv_qualifier(qualifier)?
149                .normalize(genv))
150        })
151        .try_collect()
152}
153
154fn primop_props(genv: GlobalEnv) -> QueryResult<Vec<rty::PrimOpProp>> {
155    genv.fhir_primop_props()
156        .map(|primop_prop| {
157            let wfckresults = wf::check_flux_item(genv, fhir::FluxItem::PrimOpProp(primop_prop))?;
158            Ok(AfterSortck::new(genv, &wfckresults)
159                .into_conv_ctxt()
160                .conv_primop_prop(primop_prop)?
161                .normalize(genv))
162        })
163        .try_collect()
164}
165
166fn conjoin_bind_exprs(exprs: Vec<Binder<rty::Expr>>) -> Binder<rty::Expr> {
167    let mut iter = exprs.into_iter();
168    let first = iter.next().unwrap();
169    let sorts = first.sorts();
170    let bodies = iter::once(first.skip_binder()).chain(iter.map(|expr| expr.skip_binder()));
171    let expr = rty::Expr::and_from_iter(bodies);
172    Binder::bind_with_sorts(expr, &sorts)
173}
174
175fn prim_rel(genv: GlobalEnv) -> QueryResult<UnordMap<rty::BinOp, rty::PrimRel>> {
176    let primop_props = primop_props(genv)?
177        .into_iter()
178        .into_group_map_by(|primop_prop| primop_prop.op.clone());
179
180    let mut res = UnordMap::default();
181    for (op, props) in primop_props {
182        let exprs = props
183            .iter()
184            .map(|prop| prop.body.clone())
185            .collect::<Vec<_>>();
186        let body = conjoin_bind_exprs(exprs);
187        res.insert(op, rty::PrimRel { body });
188    }
189    Ok(res)
190}
191
192fn adt_def(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::AdtDef> {
193    let item = genv.fhir_expect_item(def_id.local_id())?;
194    let invariants = invariants_of(genv, item)?;
195
196    let adt_def = genv.tcx().adt_def(def_id.resolved_id()).lower(genv.tcx());
197
198    let is_opaque = matches!(item.kind, fhir::ItemKind::Struct(def) if def.is_opaque());
199
200    Ok(rty::AdtDef::new(adt_def, genv.adt_sort_def_of(def_id)?, invariants, is_opaque))
201}
202
203fn constant_info(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::ConstantInfo> {
204    let node = genv.fhir_node(def_id.local_id())?;
205    let owner = rustc_hir::OwnerId { def_id: def_id.local_id() };
206    let Some(sort) = genv.sort_of_def_id(def_id.resolved_id()).emit(&genv)? else {
207        return Ok(rty::ConstantInfo::Uninterpreted);
208    };
209    match node {
210        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(Some(expr)), .. }) => {
211            // for these constants we must check and use the expression
212            let wfckresults = wf::check_constant_expr(genv, owner, expr, &sort)?;
213            let expr = AfterSortck::new(genv, &wfckresults)
214                .into_conv_ctxt()
215                .conv_constant_expr(expr)?;
216            Ok(rty::ConstantInfo::Interpreted(expr, sort))
217        }
218        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(None), .. })
219        | fhir::Node::AnonConst
220        | fhir::Node::TraitItem(fhir::TraitItem { kind: fhir::TraitItemKind::Const, .. })
221        | fhir::Node::ImplItem(fhir::ImplItem { kind: fhir::ImplItemKind::Const, .. }) => {
222            // for these constants we try to evaluate if they are integral and return uninterpreted if we fail
223            conv::conv_constant(genv, def_id.resolved_id())
224        }
225        _ => Err(query_bug!(def_id.local_id(), "expected const item"))?,
226    }
227}
228
229fn invariants_of<'genv>(
230    genv: GlobalEnv<'genv, '_>,
231    item: &fhir::Item<'genv>,
232) -> QueryResult<Vec<rty::Invariant>> {
233    let (params, invariants) = match &item.kind {
234        fhir::ItemKind::Enum(enum_def) => (enum_def.params, enum_def.invariants),
235        fhir::ItemKind::Struct(struct_def) => (struct_def.params, struct_def.invariants),
236        _ => Err(query_bug!(item.owner_id.local_id(), "expected struct or enum"))?,
237    };
238    let wfckresults = wf::check_invariants(genv, item.owner_id, params, invariants)?;
239    AfterSortck::new(genv, &wfckresults)
240        .into_conv_ctxt()
241        .conv_invariants(item.owner_id.map(|it| it.def_id), params, invariants)
242}
243
244fn predicates_of(
245    genv: GlobalEnv,
246    def_id: MaybeExternId,
247) -> QueryResult<rty::EarlyBinder<rty::GenericPredicates>> {
248    match genv.def_kind(def_id) {
249        DefKind::Impl { .. }
250        | DefKind::Struct
251        | DefKind::Enum
252        | DefKind::Union
253        | DefKind::TyAlias
254        | DefKind::AssocFn
255        | DefKind::AssocTy
256        | DefKind::Trait
257        | DefKind::Fn => {
258            let did = def_id.local_id();
259            let generics = genv
260                .fhir_get_generics(did)?
261                .ok_or_else(|| query_bug!(did, "no generics for {def_id:?}"))?;
262            let wfckresults = genv.check_wf(did)?;
263            AfterSortck::new(genv, &wfckresults)
264                .into_conv_ctxt()
265                .conv_generic_predicates(def_id, generics)
266        }
267        DefKind::OpaqueTy | DefKind::Closure => {
268            Ok(rty::EarlyBinder(rty::GenericPredicates {
269                parent: genv.tcx().predicates_of(def_id).parent,
270                predicates: rty::List::empty(),
271            }))
272        }
273        kind => {
274            Err(query_bug!(
275                def_id.local_id(),
276                "predicates_of called on `{def_id:?}` with kind `{kind:?}`"
277            ))?
278        }
279    }
280}
281
282fn assoc_refinements_of(
283    genv: GlobalEnv,
284    def_id: MaybeExternId,
285) -> QueryResult<rty::AssocRefinements> {
286    #[allow(
287        clippy::disallowed_methods,
288        reason = "We are iterationg over associated refinemens in fhir, so this is the *source of of truth*"
289    )]
290    let predicates = match &genv.fhir_expect_item(def_id.local_id())?.kind {
291        fhir::ItemKind::Trait(trait_) => {
292            trait_
293                .assoc_refinements
294                .iter()
295                .map(|assoc_reft| {
296                    AssocReft::new(
297                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
298                        assoc_reft.final_,
299                        assoc_reft.span,
300                    )
301                })
302                .collect()
303        }
304        fhir::ItemKind::Impl(impl_) => {
305            impl_
306                .assoc_refinements
307                .iter()
308                .map(|assoc_reft| {
309                    AssocReft::new(
310                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
311                        false,
312                        assoc_reft.span,
313                    )
314                })
315                .collect()
316        }
317        _ => Err(query_bug!(def_id.resolved_id(), "expected trait or impl"))?,
318    };
319    Ok(rty::AssocRefinements { items: predicates })
320}
321
322fn default_assoc_refinement_body(
323    genv: GlobalEnv,
324    trait_assoc_id: FluxId<MaybeExternId>,
325) -> QueryResult<Option<rty::EarlyBinder<rty::Lambda>>> {
326    let trait_id = trait_assoc_id.parent();
327    let assoc_reft = genv
328        .fhir_expect_item(trait_id.local_id())?
329        .expect_trait()
330        .find_assoc_reft(trait_assoc_id.name())
331        .unwrap();
332    let Some(body) = assoc_reft.body else { return Ok(None) };
333    let wfckresults = genv.check_wf(trait_id.local_id())?;
334    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
335    let body = cx.conv_assoc_reft_body(assoc_reft.params, &body, &assoc_reft.output)?;
336    Ok(Some(rty::EarlyBinder(body)))
337}
338
339fn assoc_refinement_body(
340    genv: GlobalEnv,
341    impl_assoc_id: FluxId<MaybeExternId>,
342) -> QueryResult<rty::EarlyBinder<rty::Lambda>> {
343    let impl_id = impl_assoc_id.parent();
344
345    let assoc_reft = genv
346        .fhir_expect_item(impl_id.local_id())?
347        .expect_impl()
348        .find_assoc_reft(impl_assoc_id.name())
349        .unwrap();
350
351    let wfckresults = genv.check_wf(impl_id.local_id())?;
352    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
353    let body = cx.conv_assoc_reft_body(assoc_reft.params, &assoc_reft.body, &assoc_reft.output)?;
354    Ok(rty::EarlyBinder(body))
355}
356
357fn sort_of_assoc_reft(
358    genv: GlobalEnv,
359    assoc_id: FluxId<MaybeExternId>,
360) -> QueryResult<rty::EarlyBinder<rty::FuncSort>> {
361    let container_id = assoc_id.parent();
362
363    match &genv.fhir_expect_item(container_id.local_id())?.kind {
364        fhir::ItemKind::Trait(trait_) => {
365            let assoc_reft = trait_.find_assoc_reft(assoc_id.name()).unwrap();
366            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
367            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
368            let inputs = assoc_reft
369                .params
370                .iter()
371                .map(|p| cx.conv_sort(&p.sort))
372                .try_collect_vec()?;
373            let output = cx.conv_sort(&assoc_reft.output)?;
374            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
375        }
376        fhir::ItemKind::Impl(impl_) => {
377            let assoc_reft = impl_.find_assoc_reft(assoc_id.name()).unwrap();
378            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
379            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
380            let inputs = assoc_reft
381                .params
382                .iter()
383                .map(|p| cx.conv_sort(&p.sort))
384                .try_collect_vec()?;
385            let output = cx.conv_sort(&assoc_reft.output)?;
386            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
387        }
388        _ => Err(query_bug!(container_id.local_id(), "expected trait or impl")),
389    }
390}
391
392fn item_bounds(
393    genv: GlobalEnv,
394    def_id: MaybeExternId,
395) -> QueryResult<rty::EarlyBinder<rty::Clauses>> {
396    let parent = genv.tcx().local_parent(def_id.local_id());
397    let wfckresults = genv.check_wf(parent)?;
398    let opaque_ty = genv.fhir_node(def_id.local_id())?.expect_opaque_ty();
399    Ok(rty::EarlyBinder(
400        AfterSortck::new(genv, &wfckresults)
401            .into_conv_ctxt()
402            .conv_opaque_ty(opaque_ty)?,
403    ))
404}
405
406fn generics_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::Generics> {
407    let def_kind = genv.def_kind(def_id);
408    let generics = match def_kind {
409        DefKind::Impl { .. }
410        | DefKind::Struct
411        | DefKind::Enum
412        | DefKind::Union
413        | DefKind::TyAlias
414        | DefKind::AssocFn
415        | DefKind::AssocTy
416        | DefKind::Trait
417        | DefKind::Fn => {
418            let is_trait = def_kind == DefKind::Trait;
419            let generics = genv
420                .fhir_get_generics(def_id.local_id())?
421                .ok_or_else(|| query_bug!(def_id.local_id(), "no generics for {def_id:?}"))?;
422            conv::conv_generics(genv, generics, def_id, is_trait)
423        }
424        DefKind::OpaqueTy | DefKind::Closure | DefKind::TraitAlias | DefKind::Ctor(..) => {
425            let rustc_generics = genv.lower_generics_of(def_id);
426            refining::refine_generics(genv, def_id.resolved_id(), &rustc_generics)
427        }
428        kind => {
429            Err(query_bug!(
430                def_id.local_id(),
431                "generics_of called on `{def_id:?}` with kind `{kind:?}`"
432            ))?
433        }
434    };
435    if config::dump_rty() {
436        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "generics.rty", &generics).unwrap();
437    }
438    Ok(generics)
439}
440
441fn refinement_generics_of(
442    genv: GlobalEnv,
443    def_id: MaybeExternId,
444) -> QueryResult<rty::EarlyBinder<rty::RefinementGenerics>> {
445    let parent = genv.tcx().generics_of(def_id).parent;
446    let parent_count =
447        if let Some(def_id) = parent { genv.refinement_generics_of(def_id)?.count() } else { 0 };
448    let generics = match genv.fhir_node(def_id.local_id())? {
449        fhir::Node::Item(fhir::Item {
450            kind: fhir::ItemKind::Fn(..) | fhir::ItemKind::TyAlias(..),
451            generics,
452            ..
453        })
454        | fhir::Node::TraitItem(fhir::TraitItem {
455            kind: fhir::TraitItemKind::Fn(..),
456            generics,
457            ..
458        })
459        | fhir::Node::ImplItem(fhir::ImplItem {
460            kind: fhir::ImplItemKind::Fn(..), generics, ..
461        }) => {
462            let wfckresults = genv.check_wf(def_id.local_id())?;
463            let params = conv::conv_refinement_generics(generics.refinement_params, &wfckresults)?;
464            rty::RefinementGenerics { parent, parent_count, own_params: params }
465        }
466        _ => rty::RefinementGenerics { parent, parent_count, own_params: rty::List::empty() },
467    };
468    Ok(rty::EarlyBinder(generics))
469}
470
471fn type_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::TyOrCtor>> {
472    let ty = match genv.def_kind(def_id) {
473        DefKind::TyAlias => {
474            let fhir_ty_alias = genv
475                .fhir_expect_item(def_id.local_id())?
476                .expect_type_alias();
477            let wfckresults = genv.check_wf(def_id.local_id())?;
478            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
479            let ty_alias = cx.conv_type_alias(def_id, fhir_ty_alias)?;
480            struct_compat::type_alias(genv, fhir_ty_alias, &ty_alias, def_id)?;
481            rty::TyOrCtor::Ctor(ty_alias)
482        }
483        DefKind::TyParam => {
484            match def_id {
485                MaybeExternId::Local(local_id) => {
486                    let owner = genv.tcx().hir_ty_param_owner(local_id);
487                    let param = genv.fhir_get_generics(owner)?.unwrap().get_param(local_id);
488                    match param.kind {
489                        fhir::GenericParamKind::Type { default: Some(ty) } => {
490                            let parent = genv.tcx().local_parent(local_id);
491                            let wfckresults = genv.check_wf(parent)?;
492                            conv::conv_default_type_parameter(genv, def_id, &ty, &wfckresults)?
493                                .into()
494                        }
495                        k => Err(query_bug!(local_id, "non-type def def {k:?} {def_id:?}"))?,
496                    }
497                }
498                MaybeExternId::Extern(_, extern_id) => {
499                    let ty = genv.lower_type_of(extern_id)?.skip_binder();
500                    Refiner::default_for_item(genv, ty_param_owner(genv, extern_id))?
501                        .refine_ty_or_base(&ty)?
502                        .into()
503                }
504            }
505        }
506        DefKind::Impl { .. } | DefKind::Struct | DefKind::Enum | DefKind::AssocTy => {
507            let ty = genv.lower_type_of(def_id)?.skip_binder();
508            Refiner::default_for_item(genv, def_id.resolved_id())?
509                .refine_ty_or_base(&ty)?
510                .into()
511        }
512        kind => {
513            Err(query_bug!(
514                def_id.local_id(),
515                "`{:?}` not supported",
516                kind.descr(def_id.resolved_id())
517            ))?
518        }
519    };
520    Ok(rty::EarlyBinder(ty))
521}
522
523fn ty_param_owner(genv: GlobalEnv, def_id: DefId) -> DefId {
524    let def_kind = genv.def_kind(def_id);
525    match def_kind {
526        DefKind::Trait | DefKind::TraitAlias => def_id,
527        DefKind::LifetimeParam | DefKind::TyParam | DefKind::ConstParam => {
528            genv.tcx().parent(def_id)
529        }
530        _ => bug!("ty_param_owner: {:?} is a {:?} not a type parameter", def_id, def_kind),
531    }
532}
533
534fn variants_of(
535    genv: GlobalEnv,
536    def_id: MaybeExternId,
537) -> QueryResult<rty::Opaqueness<rty::EarlyBinder<rty::PolyVariants>>> {
538    let local_id = def_id.local_id();
539
540    let item = &genv.fhir_expect_item(local_id)?;
541    let variants = match &item.kind {
542        fhir::ItemKind::Enum(enum_def) => {
543            let wfckresults = genv.check_wf(local_id)?;
544            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
545            let variants = cx.conv_enum_variants(def_id, enum_def)?;
546            let variants = rty::List::from_vec(struct_compat::variants(genv, &variants, def_id)?);
547            rty::Opaqueness::Transparent(rty::EarlyBinder(variants))
548        }
549        fhir::ItemKind::Struct(struct_def) => {
550            let wfckresults = genv.check_wf(local_id)?;
551            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
552            cx.conv_struct_variant(def_id, struct_def)?
553                .map(|variant| -> QueryResult<_> {
554                    let variants = struct_compat::variants(genv, &[variant], def_id)?;
555                    Ok(rty::List::from_vec(variants))
556                })
557                .transpose()?
558                .map(rty::EarlyBinder)
559        }
560        _ => Err(query_bug!(def_id.local_id(), "expected struct or enum"))?,
561    };
562    if config::dump_rty() {
563        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "rty", &variants).unwrap();
564    }
565    Ok(variants)
566}
567
568fn fn_sig(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::PolyFnSig>> {
569    match genv.fhir_node(def_id.local_id())? {
570        fhir::Node::Item(Item { kind: ItemKind::Fn(fhir_fn_sig, ..), .. })
571        | fhir::Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(fhir_fn_sig), .. })
572        | fhir::Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(fhir_fn_sig), .. })
573        | fhir::Node::ForeignItem(ForeignItem {
574            kind: ForeignItemKind::Fn(fhir_fn_sig, ..), ..
575        }) => {
576            let wfckresults = genv.check_wf(def_id.local_id())?;
577            let fn_sig = AfterSortck::new(genv, &wfckresults)
578                .into_conv_ctxt()
579                .conv_fn_sig(def_id, fhir_fn_sig)?;
580            let fn_sig = struct_compat::fn_sig(genv, fhir_fn_sig.decl, &fn_sig, def_id)?;
581            let fn_sig = fn_sig.hoist_input_binders();
582
583            if config::dump_rty() {
584                let generics = genv.generics_of(def_id)?;
585                let refinement_generics = genv.refinement_generics_of(def_id)?;
586                dbg::dump_item_info(
587                    genv.tcx(),
588                    def_id.resolved_id(),
589                    "rty",
590                    (generics, refinement_generics, &fn_sig),
591                )
592                .unwrap();
593            }
594            Ok(rty::EarlyBinder(fn_sig))
595        }
596        fhir::Node::Ctor => {
597            let tcx = genv.tcx();
598            let (adt_id, variant_idx) = match tcx.def_kind(def_id) {
599                DefKind::Ctor(CtorOf::Struct, _) => {
600                    let struct_id = tcx.parent(def_id.resolved_id());
601                    (struct_id, FIRST_VARIANT)
602                }
603                DefKind::Ctor(CtorOf::Variant, _) => {
604                    let variant_id = tcx.parent(def_id.resolved_id());
605                    let enum_id = tcx.parent(variant_id);
606                    let variant_idx = tcx.adt_def(enum_id).variant_index_with_id(variant_id);
607                    (enum_id, variant_idx)
608                }
609                _ => return Err(query_bug!("invalid `DefKind` for ctor node")),
610            };
611            genv.variant_sig(adt_id, variant_idx)?
612                .map(|sig| sig.to_poly_fn_sig(None))
613                .ok_or_query_err(adt_id)
614        }
615        node => Err(query_bug!("fn_sig called on unsupported node {node:?}")),
616    }
617}
618
619fn check_wf(genv: GlobalEnv, def_id: LocalDefId) -> QueryResult<Rc<WfckResults>> {
620    let node = genv.fhir_expect_owner_node(def_id)?;
621    let wfckresults = wf::check_node(genv, &node)?;
622    Ok(Rc::new(wfckresults))
623}
624
625mod errors {
626    use flux_errors::E0999;
627    use flux_macros::Diagnostic;
628    use flux_middle::def_id::FluxLocalDefId;
629    use rustc_span::Span;
630
631    #[derive(Diagnostic)]
632    #[diag(fhir_analysis_definition_cycle, code = E0999)]
633    pub struct DefinitionCycle {
634        #[primary_span]
635        #[label]
636        span: Span,
637        msg: String,
638    }
639
640    impl DefinitionCycle {
641        pub(super) fn new(span: Span, cycle: Vec<FluxLocalDefId>) -> Self {
642            let root = format!("`{}`", cycle[0].name());
643            let names: Vec<String> = cycle.iter().map(|s| format!("`{}`", s.name())).collect();
644            let msg = format!("{} -> {}", names.join(" -> "), root);
645            Self { span, msg }
646        }
647    }
648}
flux_fhir_analysis/lib.rs

flux_fhir_analysis/
lib.rs
