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    providers.sort_decl_param_count = sort_decl_param_count;
75}
76
77fn sort_decl_param_count(genv: GlobalEnv, def_id: FluxId<MaybeExternId>) -> usize {
78    genv.fhir_sort_decl(def_id.local_id()).unwrap().params
79}
80
81fn adt_sort_def_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::AdtSortDef> {
82    let kind = genv.fhir_expect_refinement_kind(def_id.local_id())?;
83    conv::conv_adt_sort_def(genv, def_id, kind)
84}
85
86fn func_sort(genv: GlobalEnv, def_id: FluxId<MaybeExternId>) -> rty::PolyFuncSort {
87    let func = genv.fhir_spec_func_body(def_id.local_id()).unwrap();
88    match conv::conv_func_decl(genv, func).emit(&genv) {
89        Ok(normalized) => normalized,
90        Err(err) => {
91            genv.sess().abort(err);
92        }
93    }
94}
95
96fn flux_def_ident_span(genv: GlobalEnv, def_id: FluxId<MaybeExternId>) -> Span {
97    genv.fhir_spec_func_body(def_id.local_id())
98        .unwrap()
99        .ident_span
100}
101
102fn normalized_defns(genv: GlobalEnv) -> rty::NormalizedDefns {
103    match try_normalized_defns(genv) {
104        Ok(normalized) => normalized,
105        Err(err) => {
106            genv.sess().abort(err);
107        }
108    }
109}
110
111fn try_normalized_defns(genv: GlobalEnv) -> Result<rty::NormalizedDefns, ErrorGuaranteed> {
112    let mut defns = vec![];
113
114    // Collect and emit all errors
115    let mut errors = Errors::new(genv.sess());
116    for (_, item) in genv.fhir_iter_flux_items() {
117        let fhir::FluxItem::Func(func) = item else { continue };
118        let Some(wfckresults) = wf::check_flux_item(genv, item).collect_err(&mut errors) else {
119            continue;
120        };
121        let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
122        let Ok(defn) = cx.conv_defn(func).emit(&errors) else { continue };
123        defns.push((func.def_id, defn, func.hide));
124    }
125    errors.to_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    let tcx = genv.tcx();
210    match node {
211        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(Some(expr)), .. }) => {
212            // If the constant has a `#[consant(expr)]` annotation we use that
213            let wfckresults = wf::check_constant_expr(genv, owner, expr, &sort)?;
214            let expr = AfterSortck::new(genv, &wfckresults)
215                .into_conv_ctxt()
216                .conv_constant_expr(expr)?;
217            Ok(rty::ConstantInfo::Interpreted(expr, sort))
218        }
219        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(None), .. })
220        | fhir::Node::AnonConst
221        | fhir::Node::ImplItem(fhir::ImplItem { kind: fhir::ImplItemKind::Const, .. }) => {
222            // For other constants, we try to evaluate them if they are integral
223            if let Some(ty) = tcx.type_of(def_id).no_bound_vars()
224                && ty.is_integral()
225                && let Ok(val) = tcx.const_eval_poly(def_id.resolved_id())
226                && let Some(val) = val.try_to_scalar_int()
227                && let Some(constant_) = rty::Constant::from_scalar_int(tcx, val, &ty)
228            {
229                // FIXME(nilehmann) we should probably report an error in case const evaluation
230                // fails instead of silently ignore it.
231                Ok(rty::ConstantInfo::Interpreted(rty::Expr::constant(constant_), rty::Sort::Int))
232            } else {
233                Ok(rty::ConstantInfo::Uninterpreted)
234            }
235        }
236        fhir::Node::TraitItem(fhir::TraitItem { kind: fhir::TraitItemKind::Const, .. }) => {
237            Ok(rty::ConstantInfo::Uninterpreted)
238        }
239        _ => Err(query_bug!(def_id.local_id(), "expected const item"))?,
240    }
241}
242
243fn invariants_of<'genv>(
244    genv: GlobalEnv<'genv, '_>,
245    item: &fhir::Item<'genv>,
246) -> QueryResult<Vec<rty::Invariant>> {
247    let (params, invariants) = match &item.kind {
248        fhir::ItemKind::Enum(enum_def) => (enum_def.params, enum_def.invariants),
249        fhir::ItemKind::Struct(struct_def) => (struct_def.params, struct_def.invariants),
250        _ => Err(query_bug!(item.owner_id.local_id(), "expected struct or enum"))?,
251    };
252    let wfckresults = wf::check_invariants(genv, item.owner_id, params, invariants)?;
253    AfterSortck::new(genv, &wfckresults)
254        .into_conv_ctxt()
255        .conv_invariants(item.owner_id.map(|it| it.def_id), params, invariants)
256}
257
258fn predicates_of(
259    genv: GlobalEnv,
260    def_id: MaybeExternId,
261) -> QueryResult<rty::EarlyBinder<rty::GenericPredicates>> {
262    match genv.def_kind(def_id) {
263        DefKind::Impl { .. }
264        | DefKind::Struct
265        | DefKind::Enum
266        | DefKind::Union
267        | DefKind::TyAlias
268        | DefKind::AssocFn
269        | DefKind::AssocTy
270        | DefKind::Trait
271        | DefKind::Fn => {
272            let did = def_id.local_id();
273            let generics = genv
274                .fhir_get_generics(did)?
275                .ok_or_else(|| query_bug!(did, "no generics for {def_id:?}"))?;
276            let wfckresults = genv.check_wf(did)?;
277            AfterSortck::new(genv, &wfckresults)
278                .into_conv_ctxt()
279                .conv_generic_predicates(def_id, generics)
280        }
281        DefKind::OpaqueTy | DefKind::Closure => {
282            Ok(rty::EarlyBinder(rty::GenericPredicates {
283                parent: genv.tcx().predicates_of(def_id).parent,
284                predicates: rty::List::empty(),
285            }))
286        }
287        kind => {
288            Err(query_bug!(
289                def_id.local_id(),
290                "predicates_of called on `{def_id:?}` with kind `{kind:?}`"
291            ))?
292        }
293    }
294}
295
296fn assoc_refinements_of(
297    genv: GlobalEnv,
298    def_id: MaybeExternId,
299) -> QueryResult<rty::AssocRefinements> {
300    #[allow(
301        clippy::disallowed_methods,
302        reason = "We are iterationg over associated refinemens in fhir, so this is the *source of of truth*"
303    )]
304    let predicates = match &genv.fhir_expect_item(def_id.local_id())?.kind {
305        fhir::ItemKind::Trait(trait_) => {
306            trait_
307                .assoc_refinements
308                .iter()
309                .map(|assoc_reft| {
310                    AssocReft::new(
311                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
312                        assoc_reft.final_,
313                        assoc_reft.span,
314                    )
315                })
316                .collect()
317        }
318        fhir::ItemKind::Impl(impl_) => {
319            impl_
320                .assoc_refinements
321                .iter()
322                .map(|assoc_reft| {
323                    AssocReft::new(
324                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
325                        false,
326                        assoc_reft.span,
327                    )
328                })
329                .collect()
330        }
331        _ => Err(query_bug!(def_id.resolved_id(), "expected trait or impl"))?,
332    };
333    Ok(rty::AssocRefinements { items: predicates })
334}
335
336fn default_assoc_refinement_body(
337    genv: GlobalEnv,
338    trait_assoc_id: FluxId<MaybeExternId>,
339) -> QueryResult<Option<rty::EarlyBinder<rty::Lambda>>> {
340    let trait_id = trait_assoc_id.parent();
341    let assoc_reft = genv
342        .fhir_expect_item(trait_id.local_id())?
343        .expect_trait()
344        .find_assoc_reft(trait_assoc_id.name())
345        .unwrap();
346    let Some(body) = assoc_reft.body else { return Ok(None) };
347    let wfckresults = genv.check_wf(trait_id.local_id())?;
348    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
349    let body = cx.conv_assoc_reft_body(assoc_reft.params, &body, &assoc_reft.output)?;
350    Ok(Some(rty::EarlyBinder(body)))
351}
352
353fn assoc_refinement_body(
354    genv: GlobalEnv,
355    impl_assoc_id: FluxId<MaybeExternId>,
356) -> QueryResult<rty::EarlyBinder<rty::Lambda>> {
357    let impl_id = impl_assoc_id.parent();
358
359    let assoc_reft = genv
360        .fhir_expect_item(impl_id.local_id())?
361        .expect_impl()
362        .find_assoc_reft(impl_assoc_id.name())
363        .unwrap();
364
365    let wfckresults = genv.check_wf(impl_id.local_id())?;
366    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
367    let body = cx.conv_assoc_reft_body(assoc_reft.params, &assoc_reft.body, &assoc_reft.output)?;
368    Ok(rty::EarlyBinder(body))
369}
370
371fn sort_of_assoc_reft(
372    genv: GlobalEnv,
373    assoc_id: FluxId<MaybeExternId>,
374) -> QueryResult<rty::EarlyBinder<rty::FuncSort>> {
375    let container_id = assoc_id.parent();
376
377    match &genv.fhir_expect_item(container_id.local_id())?.kind {
378        fhir::ItemKind::Trait(trait_) => {
379            let assoc_reft = trait_.find_assoc_reft(assoc_id.name()).unwrap();
380            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
381            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
382            let inputs = assoc_reft
383                .params
384                .iter()
385                .map(|p| cx.conv_sort(&p.sort))
386                .try_collect_vec()?;
387            let output = cx.conv_sort(&assoc_reft.output)?;
388            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
389        }
390        fhir::ItemKind::Impl(impl_) => {
391            let assoc_reft = impl_.find_assoc_reft(assoc_id.name()).unwrap();
392            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
393            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
394            let inputs = assoc_reft
395                .params
396                .iter()
397                .map(|p| cx.conv_sort(&p.sort))
398                .try_collect_vec()?;
399            let output = cx.conv_sort(&assoc_reft.output)?;
400            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
401        }
402        _ => Err(query_bug!(container_id.local_id(), "expected trait or impl")),
403    }
404}
405
406fn item_bounds(
407    genv: GlobalEnv,
408    def_id: MaybeExternId,
409) -> QueryResult<rty::EarlyBinder<rty::Clauses>> {
410    let parent = genv.tcx().local_parent(def_id.local_id());
411    let wfckresults = genv.check_wf(parent)?;
412    let opaque_ty = genv.fhir_node(def_id.local_id())?.expect_opaque_ty();
413    Ok(rty::EarlyBinder(
414        AfterSortck::new(genv, &wfckresults)
415            .into_conv_ctxt()
416            .conv_opaque_ty(opaque_ty)?,
417    ))
418}
419
420fn generics_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::Generics> {
421    let def_kind = genv.def_kind(def_id);
422    let generics = match def_kind {
423        DefKind::Impl { .. }
424        | DefKind::Struct
425        | DefKind::Enum
426        | DefKind::Union
427        | DefKind::TyAlias
428        | DefKind::AssocFn
429        | DefKind::AssocTy
430        | DefKind::Trait
431        | DefKind::Fn => {
432            let is_trait = def_kind == DefKind::Trait;
433            let generics = genv
434                .fhir_get_generics(def_id.local_id())?
435                .ok_or_else(|| query_bug!(def_id.local_id(), "no generics for {def_id:?}"))?;
436            conv::conv_generics(genv, generics, def_id, is_trait)
437        }
438        DefKind::OpaqueTy | DefKind::Closure | DefKind::TraitAlias | DefKind::Ctor(..) => {
439            let rustc_generics = genv.lower_generics_of(def_id);
440            refining::refine_generics(genv, def_id.resolved_id(), &rustc_generics)
441        }
442        kind => {
443            Err(query_bug!(
444                def_id.local_id(),
445                "generics_of called on `{def_id:?}` with kind `{kind:?}`"
446            ))?
447        }
448    };
449    if config::dump_rty() {
450        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "generics.rty", &generics).unwrap();
451    }
452    Ok(generics)
453}
454
455fn refinement_generics_of(
456    genv: GlobalEnv,
457    def_id: MaybeExternId,
458) -> QueryResult<rty::EarlyBinder<rty::RefinementGenerics>> {
459    let parent = genv.tcx().generics_of(def_id).parent;
460    let parent_count =
461        if let Some(def_id) = parent { genv.refinement_generics_of(def_id)?.count() } else { 0 };
462    let generics = match genv.fhir_node(def_id.local_id())? {
463        fhir::Node::Item(fhir::Item {
464            kind: fhir::ItemKind::Fn(..) | fhir::ItemKind::TyAlias(..),
465            generics,
466            ..
467        })
468        | fhir::Node::TraitItem(fhir::TraitItem {
469            kind: fhir::TraitItemKind::Fn(..),
470            generics,
471            ..
472        })
473        | fhir::Node::ImplItem(fhir::ImplItem {
474            kind: fhir::ImplItemKind::Fn(..), generics, ..
475        }) => {
476            let wfckresults = genv.check_wf(def_id.local_id())?;
477            let params = conv::conv_refinement_generics(generics.refinement_params, &wfckresults)?;
478            rty::RefinementGenerics { parent, parent_count, own_params: params }
479        }
480        _ => rty::RefinementGenerics { parent, parent_count, own_params: rty::List::empty() },
481    };
482    Ok(rty::EarlyBinder(generics))
483}
484
485fn type_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::TyOrCtor>> {
486    let ty = match genv.def_kind(def_id) {
487        DefKind::TyAlias => {
488            let fhir_ty_alias = genv
489                .fhir_expect_item(def_id.local_id())?
490                .expect_type_alias();
491            let wfckresults = genv.check_wf(def_id.local_id())?;
492            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
493            let ty_alias = cx.conv_type_alias(def_id, fhir_ty_alias)?;
494            struct_compat::type_alias(genv, fhir_ty_alias, &ty_alias, def_id)?;
495            rty::TyOrCtor::Ctor(ty_alias)
496        }
497        DefKind::TyParam => {
498            match def_id {
499                MaybeExternId::Local(local_id) => {
500                    let owner = genv.tcx().hir_ty_param_owner(local_id);
501                    let param = genv.fhir_get_generics(owner)?.unwrap().get_param(local_id);
502                    match param.kind {
503                        fhir::GenericParamKind::Type { default: Some(ty) } => {
504                            let parent = genv.tcx().local_parent(local_id);
505                            let wfckresults = genv.check_wf(parent)?;
506                            conv::conv_default_type_parameter(genv, def_id, &ty, &wfckresults)?
507                                .into()
508                        }
509                        k => Err(query_bug!(local_id, "non-type def def {k:?} {def_id:?}"))?,
510                    }
511                }
512                MaybeExternId::Extern(_, extern_id) => {
513                    let ty = genv.lower_type_of(extern_id)?.skip_binder();
514                    Refiner::default_for_item(genv, ty_param_owner(genv, extern_id))?
515                        .refine_ty_or_base(&ty)?
516                        .into()
517                }
518            }
519        }
520        DefKind::Impl { .. } | DefKind::Struct | DefKind::Enum | DefKind::AssocTy => {
521            let ty = genv.lower_type_of(def_id)?.skip_binder();
522            Refiner::default_for_item(genv, def_id.resolved_id())?
523                .refine_ty_or_base(&ty)?
524                .into()
525        }
526        kind => {
527            Err(query_bug!(
528                def_id.local_id(),
529                "`{:?}` not supported",
530                kind.descr(def_id.resolved_id())
531            ))?
532        }
533    };
534    Ok(rty::EarlyBinder(ty))
535}
536
537fn ty_param_owner(genv: GlobalEnv, def_id: DefId) -> DefId {
538    let def_kind = genv.def_kind(def_id);
539    match def_kind {
540        DefKind::Trait | DefKind::TraitAlias => def_id,
541        DefKind::LifetimeParam | DefKind::TyParam | DefKind::ConstParam => {
542            genv.tcx().parent(def_id)
543        }
544        _ => bug!("ty_param_owner: {:?} is a {:?} not a type parameter", def_id, def_kind),
545    }
546}
547
548fn variants_of(
549    genv: GlobalEnv,
550    def_id: MaybeExternId,
551) -> QueryResult<rty::Opaqueness<rty::EarlyBinder<rty::PolyVariants>>> {
552    let local_id = def_id.local_id();
553
554    let item = &genv.fhir_expect_item(local_id)?;
555    let variants = match &item.kind {
556        fhir::ItemKind::Enum(enum_def) => {
557            let wfckresults = genv.check_wf(local_id)?;
558            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
559            let variants = cx.conv_enum_variants(def_id, enum_def)?;
560            let variants = rty::List::from_vec(struct_compat::variants(genv, &variants, def_id)?);
561            rty::Opaqueness::Transparent(rty::EarlyBinder(variants))
562        }
563        fhir::ItemKind::Struct(struct_def) => {
564            let wfckresults = genv.check_wf(local_id)?;
565            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
566            cx.conv_struct_variant(def_id, struct_def)?
567                .map(|variant| -> QueryResult<_> {
568                    let variants = struct_compat::variants(genv, &[variant], def_id)?;
569                    Ok(rty::List::from_vec(variants))
570                })
571                .transpose()?
572                .map(rty::EarlyBinder)
573        }
574        _ => Err(query_bug!(def_id.local_id(), "expected struct or enum"))?,
575    };
576    if config::dump_rty() {
577        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "rty", &variants).unwrap();
578    }
579    Ok(variants)
580}
581
582fn fn_sig(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::PolyFnSig>> {
583    match genv.fhir_node(def_id.local_id())? {
584        fhir::Node::Item(Item { kind: ItemKind::Fn(fhir_fn_sig, ..), .. })
585        | fhir::Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(fhir_fn_sig), .. })
586        | fhir::Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(fhir_fn_sig), .. })
587        | fhir::Node::ForeignItem(ForeignItem {
588            kind: ForeignItemKind::Fn(fhir_fn_sig, ..), ..
589        }) => {
590            let wfckresults = genv.check_wf(def_id.local_id())?;
591            let fn_sig = AfterSortck::new(genv, &wfckresults)
592                .into_conv_ctxt()
593                .conv_fn_sig(def_id, fhir_fn_sig)?;
594            let fn_sig = struct_compat::fn_sig(genv, fhir_fn_sig.decl, &fn_sig, def_id)?;
595            let fn_sig = fn_sig.hoist_input_binders();
596
597            if config::dump_rty() {
598                let generics = genv.generics_of(def_id)?;
599                let refinement_generics = genv.refinement_generics_of(def_id)?;
600                dbg::dump_item_info(
601                    genv.tcx(),
602                    def_id.resolved_id(),
603                    "rty",
604                    (generics, refinement_generics, &fn_sig),
605                )
606                .unwrap();
607            }
608            Ok(rty::EarlyBinder(fn_sig))
609        }
610        fhir::Node::Ctor => {
611            let tcx = genv.tcx();
612            let (adt_id, variant_idx) = match tcx.def_kind(def_id) {
613                DefKind::Ctor(CtorOf::Struct, _) => {
614                    let struct_id = tcx.parent(def_id.resolved_id());
615                    (struct_id, FIRST_VARIANT)
616                }
617                DefKind::Ctor(CtorOf::Variant, _) => {
618                    let variant_id = tcx.parent(def_id.resolved_id());
619                    let enum_id = tcx.parent(variant_id);
620                    let variant_idx = tcx.adt_def(enum_id).variant_index_with_id(variant_id);
621                    (enum_id, variant_idx)
622                }
623                _ => return Err(query_bug!("invalid `DefKind` for ctor node")),
624            };
625            genv.variant_sig(adt_id, variant_idx)?
626                .map(|sig| sig.to_poly_fn_sig(None))
627                .ok_or_query_err(adt_id)
628        }
629        node => Err(query_bug!("fn_sig called on unsupported node {node:?}")),
630    }
631}
632
633fn check_wf(genv: GlobalEnv, def_id: LocalDefId) -> QueryResult<Rc<WfckResults>> {
634    let node = genv.fhir_expect_owner_node(def_id)?;
635    let wfckresults = wf::check_node(genv, &node)?;
636    Ok(Rc::new(wfckresults))
637}
638
639mod errors {
640    use flux_errors::E0999;
641    use flux_macros::Diagnostic;
642    use flux_middle::def_id::FluxLocalDefId;
643    use rustc_span::Span;
644
645    #[derive(Diagnostic)]
646    #[diag(fhir_analysis_definition_cycle, code = E0999)]
647    pub struct DefinitionCycle {
648        #[primary_span]
649        #[label]
650        span: Span,
651        msg: String,
652    }
653
654    impl DefinitionCycle {
655        pub(super) fn new(span: Span, cycle: Vec<FluxLocalDefId>) -> Self {
656            let root = format!("`{}`", cycle[0].name());
657            let names: Vec<String> = cycle.iter().map(|s| format!("`{}`", s.name())).collect();
658            let msg = format!("{} -> {}", names.join(" -> "), root);
659            Self { span, msg }
660        }
661    }
662}
flux_fhir_analysis/lib.rs

flux_fhir_analysis/
lib.rs
