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 {
123            continue;
124        };
125
126        if let Some(defn) = defn {
127            defns.push((func.def_id, defn, func.hide));
128        }
129    }
130    errors.into_result()?;
131
132    let defns = rty::NormalizedDefns::new(genv, &defns)
133        .map_err(|cycle| {
134            let span = genv
135                .fhir_spec_func_body(cycle[0])
136                .unwrap()
137                .body
138                .unwrap()
139                .span;
140            errors::DefinitionCycle::new(span, cycle)
141        })
142        .emit(&genv)?;
143
144    Ok(defns)
145}
146
147fn qualifiers(genv: GlobalEnv) -> QueryResult<Vec<rty::Qualifier>> {
148    genv.fhir_qualifiers()
149        .map(|qualifier| {
150            let wfckresults = wf::check_flux_item(genv, fhir::FluxItem::Qualifier(qualifier))?;
151            Ok(AfterSortck::new(genv, &wfckresults)
152                .into_conv_ctxt()
153                .conv_qualifier(qualifier)?
154                .normalize(genv))
155        })
156        .try_collect()
157}
158
159fn primop_props(genv: GlobalEnv) -> QueryResult<Vec<rty::PrimOpProp>> {
160    genv.fhir_primop_props()
161        .map(|primop_prop| {
162            let wfckresults = wf::check_flux_item(genv, fhir::FluxItem::PrimOpProp(primop_prop))?;
163            Ok(AfterSortck::new(genv, &wfckresults)
164                .into_conv_ctxt()
165                .conv_primop_prop(primop_prop)?
166                .normalize(genv))
167        })
168        .try_collect()
169}
170
171fn conjoin_bind_exprs(exprs: Vec<Binder<rty::Expr>>) -> Binder<rty::Expr> {
172    let mut iter = exprs.into_iter();
173    let first = iter.next().unwrap();
174    let sorts = first.sorts();
175    let bodies = iter::once(first.skip_binder()).chain(iter.map(|expr| expr.skip_binder()));
176    let expr = rty::Expr::and_from_iter(bodies);
177    Binder::bind_with_sorts(expr, &sorts)
178}
179
180fn prim_rel(genv: GlobalEnv) -> QueryResult<UnordMap<rty::BinOp, rty::PrimRel>> {
181    let primop_props = primop_props(genv)?
182        .into_iter()
183        .into_group_map_by(|primop_prop| primop_prop.op.clone());
184
185    let mut res = UnordMap::default();
186    for (op, props) in primop_props {
187        let exprs = props
188            .iter()
189            .map(|prop| prop.body.clone())
190            .collect::<Vec<_>>();
191        let body = conjoin_bind_exprs(exprs);
192        res.insert(op, rty::PrimRel { body });
193    }
194    Ok(res)
195}
196
197fn adt_def(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::AdtDef> {
198    let item = genv.fhir_expect_item(def_id.local_id())?;
199    let invariants = invariants_of(genv, item)?;
200
201    let adt_def = genv.tcx().adt_def(def_id.resolved_id()).lower(genv.tcx());
202
203    let is_opaque = matches!(item.kind, fhir::ItemKind::Struct(def) if def.is_opaque());
204
205    Ok(rty::AdtDef::new(adt_def, genv.adt_sort_def_of(def_id)?, invariants, is_opaque))
206}
207
208fn constant_info(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::ConstantInfo> {
209    let node = genv.fhir_node(def_id.local_id())?;
210    let owner = rustc_hir::OwnerId { def_id: def_id.local_id() };
211    let Some(sort) = genv.sort_of_def_id(def_id.resolved_id()).emit(&genv)? else {
212        return Ok(rty::ConstantInfo::Uninterpreted);
213    };
214    match node {
215        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(Some(expr)), .. }) => {
216            // for these constants we must check and use the expression
217            let wfckresults = wf::check_constant_expr(genv, owner, expr, &sort)?;
218            let expr = AfterSortck::new(genv, &wfckresults)
219                .into_conv_ctxt()
220                .conv_constant_expr(expr)?;
221            Ok(rty::ConstantInfo::Interpreted(expr, sort))
222        }
223        fhir::Node::Item(fhir::Item { kind: fhir::ItemKind::Const(None), .. })
224        | fhir::Node::AnonConst
225        | fhir::Node::TraitItem(fhir::TraitItem { kind: fhir::TraitItemKind::Const, .. })
226        | fhir::Node::ImplItem(fhir::ImplItem { kind: fhir::ImplItemKind::Const, .. }) => {
227            // for these constants we try to evaluate if they are integral and return uninterpreted if we fail
228            conv::conv_constant(genv, def_id.resolved_id())
229        }
230        _ => Err(query_bug!(def_id.local_id(), "expected const item"))?,
231    }
232}
233
234fn invariants_of<'genv>(
235    genv: GlobalEnv<'genv, '_>,
236    item: &fhir::Item<'genv>,
237) -> QueryResult<Vec<rty::Invariant>> {
238    let (params, invariants) = match &item.kind {
239        fhir::ItemKind::Enum(enum_def) => (enum_def.params, enum_def.invariants),
240        fhir::ItemKind::Struct(struct_def) => (struct_def.params, struct_def.invariants),
241        _ => Err(query_bug!(item.owner_id.local_id(), "expected struct or enum"))?,
242    };
243    let wfckresults = wf::check_invariants(genv, item.owner_id, params, invariants)?;
244    AfterSortck::new(genv, &wfckresults)
245        .into_conv_ctxt()
246        .conv_invariants(item.owner_id.map(|it| it.def_id), params, invariants)
247}
248
249fn predicates_of(
250    genv: GlobalEnv,
251    def_id: MaybeExternId,
252) -> QueryResult<rty::EarlyBinder<rty::GenericPredicates>> {
253    match genv.def_kind(def_id) {
254        DefKind::Impl { .. }
255        | DefKind::Struct
256        | DefKind::Enum
257        | DefKind::Union
258        | DefKind::TyAlias
259        | DefKind::AssocFn
260        | DefKind::AssocTy
261        | DefKind::Trait
262        | DefKind::Fn => {
263            let did = def_id.local_id();
264            let generics = genv
265                .fhir_get_generics(did)?
266                .ok_or_else(|| query_bug!(did, "no generics for {def_id:?}"))?;
267            let wfckresults = genv.check_wf(did)?;
268            AfterSortck::new(genv, &wfckresults)
269                .into_conv_ctxt()
270                .conv_generic_predicates(def_id, generics)
271        }
272        DefKind::OpaqueTy | DefKind::Closure => {
273            Ok(rty::EarlyBinder(rty::GenericPredicates {
274                parent: genv.tcx().predicates_of(def_id).parent,
275                predicates: rty::List::empty(),
276            }))
277        }
278        kind => {
279            Err(query_bug!(
280                def_id.local_id(),
281                "predicates_of called on `{def_id:?}` with kind `{kind:?}`"
282            ))?
283        }
284    }
285}
286
287fn assoc_refinements_of(
288    genv: GlobalEnv,
289    def_id: MaybeExternId,
290) -> QueryResult<rty::AssocRefinements> {
291    #[allow(
292        clippy::disallowed_methods,
293        reason = "We are iterationg over associated refinemens in fhir, so this is the *source of of truth*"
294    )]
295    let predicates = match &genv.fhir_expect_item(def_id.local_id())?.kind {
296        fhir::ItemKind::Trait(trait_) => {
297            trait_
298                .assoc_refinements
299                .iter()
300                .map(|assoc_reft| {
301                    AssocReft::new(
302                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
303                        assoc_reft.final_,
304                        assoc_reft.span,
305                    )
306                })
307                .collect()
308        }
309        fhir::ItemKind::Impl(impl_) => {
310            impl_
311                .assoc_refinements
312                .iter()
313                .map(|assoc_reft| {
314                    AssocReft::new(
315                        FluxDefId::new(def_id.resolved_id(), assoc_reft.name),
316                        false,
317                        assoc_reft.span,
318                    )
319                })
320                .collect()
321        }
322        _ => Err(query_bug!(def_id.resolved_id(), "expected trait or impl"))?,
323    };
324    Ok(rty::AssocRefinements { items: predicates })
325}
326
327fn default_assoc_refinement_body(
328    genv: GlobalEnv,
329    trait_assoc_id: FluxId<MaybeExternId>,
330) -> QueryResult<Option<rty::EarlyBinder<rty::Lambda>>> {
331    let trait_id = trait_assoc_id.parent();
332    let assoc_reft = genv
333        .fhir_expect_item(trait_id.local_id())?
334        .expect_trait()
335        .find_assoc_reft(trait_assoc_id.name())
336        .unwrap();
337    let Some(body) = assoc_reft.body else { return Ok(None) };
338    let wfckresults = genv.check_wf(trait_id.local_id())?;
339    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
340    let body = cx.conv_assoc_reft_body(assoc_reft.params, &body, &assoc_reft.output)?;
341    Ok(Some(rty::EarlyBinder(body)))
342}
343
344fn assoc_refinement_body(
345    genv: GlobalEnv,
346    impl_assoc_id: FluxId<MaybeExternId>,
347) -> QueryResult<rty::EarlyBinder<rty::Lambda>> {
348    let impl_id = impl_assoc_id.parent();
349
350    let assoc_reft = genv
351        .fhir_expect_item(impl_id.local_id())?
352        .expect_impl()
353        .find_assoc_reft(impl_assoc_id.name())
354        .unwrap();
355
356    let wfckresults = genv.check_wf(impl_id.local_id())?;
357    let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
358    let body = cx.conv_assoc_reft_body(assoc_reft.params, &assoc_reft.body, &assoc_reft.output)?;
359    Ok(rty::EarlyBinder(body))
360}
361
362fn sort_of_assoc_reft(
363    genv: GlobalEnv,
364    assoc_id: FluxId<MaybeExternId>,
365) -> QueryResult<rty::EarlyBinder<rty::FuncSort>> {
366    let container_id = assoc_id.parent();
367
368    match &genv.fhir_expect_item(container_id.local_id())?.kind {
369        fhir::ItemKind::Trait(trait_) => {
370            let assoc_reft = trait_.find_assoc_reft(assoc_id.name()).unwrap();
371            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
372            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
373            let inputs = assoc_reft
374                .params
375                .iter()
376                .map(|p| cx.conv_sort(&p.sort))
377                .try_collect_vec()?;
378            let output = cx.conv_sort(&assoc_reft.output)?;
379            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
380        }
381        fhir::ItemKind::Impl(impl_) => {
382            let assoc_reft = impl_.find_assoc_reft(assoc_id.name()).unwrap();
383            let wfckresults = WfckResults::new(OwnerId { def_id: container_id.local_id() });
384            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
385            let inputs = assoc_reft
386                .params
387                .iter()
388                .map(|p| cx.conv_sort(&p.sort))
389                .try_collect_vec()?;
390            let output = cx.conv_sort(&assoc_reft.output)?;
391            Ok(rty::EarlyBinder(rty::FuncSort::new(inputs, output)))
392        }
393        _ => Err(query_bug!(container_id.local_id(), "expected trait or impl")),
394    }
395}
396
397fn item_bounds(
398    genv: GlobalEnv,
399    def_id: MaybeExternId,
400) -> QueryResult<rty::EarlyBinder<rty::Clauses>> {
401    let parent = genv.tcx().local_parent(def_id.local_id());
402    let wfckresults = genv.check_wf(parent)?;
403    let opaque_ty = genv.fhir_node(def_id.local_id())?.expect_opaque_ty();
404    Ok(rty::EarlyBinder(
405        AfterSortck::new(genv, &wfckresults)
406            .into_conv_ctxt()
407            .conv_opaque_ty(opaque_ty)?,
408    ))
409}
410
411fn generics_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::Generics> {
412    let def_kind = genv.def_kind(def_id);
413    let generics = match def_kind {
414        DefKind::Impl { .. }
415        | DefKind::Struct
416        | DefKind::Enum
417        | DefKind::Union
418        | DefKind::TyAlias
419        | DefKind::AssocFn
420        | DefKind::AssocTy
421        | DefKind::Trait
422        | DefKind::Fn => {
423            let is_trait = def_kind == DefKind::Trait;
424            let generics = genv
425                .fhir_get_generics(def_id.local_id())?
426                .ok_or_else(|| query_bug!(def_id.local_id(), "no generics for {def_id:?}"))?;
427            conv::conv_generics(genv, generics, def_id, is_trait)
428        }
429        DefKind::OpaqueTy | DefKind::Closure | DefKind::TraitAlias | DefKind::Ctor(..) => {
430            let rustc_generics = genv.lower_generics_of(def_id);
431            refining::refine_generics(genv, def_id.resolved_id(), &rustc_generics)
432        }
433        kind => {
434            Err(query_bug!(
435                def_id.local_id(),
436                "generics_of called on `{def_id:?}` with kind `{kind:?}`"
437            ))?
438        }
439    };
440    if config::dump_rty() {
441        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "generics.rty", &generics).unwrap();
442    }
443    Ok(generics)
444}
445
446fn refinement_generics_of(
447    genv: GlobalEnv,
448    def_id: MaybeExternId,
449) -> QueryResult<rty::EarlyBinder<rty::RefinementGenerics>> {
450    let parent = genv.tcx().generics_of(def_id).parent;
451    let parent_count =
452        if let Some(def_id) = parent { genv.refinement_generics_of(def_id)?.count() } else { 0 };
453    let generics = match genv.fhir_node(def_id.local_id())? {
454        fhir::Node::Item(fhir::Item {
455            kind: fhir::ItemKind::Fn(..) | fhir::ItemKind::TyAlias(..),
456            generics,
457            ..
458        })
459        | fhir::Node::TraitItem(fhir::TraitItem {
460            kind: fhir::TraitItemKind::Fn(..),
461            generics,
462            ..
463        })
464        | fhir::Node::ImplItem(fhir::ImplItem {
465            kind: fhir::ImplItemKind::Fn(..), generics, ..
466        }) => {
467            let wfckresults = genv.check_wf(def_id.local_id())?;
468            let params = conv::conv_refinement_generics(generics.refinement_params, &wfckresults)?;
469            rty::RefinementGenerics { parent, parent_count, own_params: params }
470        }
471        _ => rty::RefinementGenerics { parent, parent_count, own_params: rty::List::empty() },
472    };
473    Ok(rty::EarlyBinder(generics))
474}
475
476fn type_of(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::TyOrCtor>> {
477    let ty = match genv.def_kind(def_id) {
478        DefKind::TyAlias => {
479            let fhir_ty_alias = genv
480                .fhir_expect_item(def_id.local_id())?
481                .expect_type_alias();
482            let wfckresults = genv.check_wf(def_id.local_id())?;
483            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
484            let ty_alias = cx.conv_type_alias(def_id, fhir_ty_alias)?;
485            struct_compat::type_alias(genv, fhir_ty_alias, &ty_alias, def_id)?;
486            rty::TyOrCtor::Ctor(ty_alias)
487        }
488        DefKind::TyParam => {
489            match def_id {
490                MaybeExternId::Local(local_id) => {
491                    let owner = genv.tcx().hir_ty_param_owner(local_id);
492                    let param = genv.fhir_get_generics(owner)?.unwrap().get_param(local_id);
493                    match param.kind {
494                        fhir::GenericParamKind::Type { default: Some(ty) } => {
495                            let parent = genv.tcx().local_parent(local_id);
496                            let wfckresults = genv.check_wf(parent)?;
497                            conv::conv_default_type_parameter(genv, def_id, &ty, &wfckresults)?
498                                .into()
499                        }
500                        k => Err(query_bug!(local_id, "non-type def def {k:?} {def_id:?}"))?,
501                    }
502                }
503                MaybeExternId::Extern(_, extern_id) => {
504                    let ty = genv.lower_type_of(extern_id)?.skip_binder();
505                    Refiner::default_for_item(genv, ty_param_owner(genv, extern_id))?
506                        .refine_ty_or_base(&ty)?
507                        .into()
508                }
509            }
510        }
511        DefKind::Impl { .. } | DefKind::Struct | DefKind::Enum | DefKind::AssocTy => {
512            let ty = genv.lower_type_of(def_id)?.skip_binder();
513            Refiner::default_for_item(genv, def_id.resolved_id())?
514                .refine_ty_or_base(&ty)?
515                .into()
516        }
517        kind => {
518            Err(query_bug!(
519                def_id.local_id(),
520                "`{:?}` not supported",
521                kind.descr(def_id.resolved_id())
522            ))?
523        }
524    };
525    Ok(rty::EarlyBinder(ty))
526}
527
528fn ty_param_owner(genv: GlobalEnv, def_id: DefId) -> DefId {
529    let def_kind = genv.def_kind(def_id);
530    match def_kind {
531        DefKind::Trait | DefKind::TraitAlias => def_id,
532        DefKind::LifetimeParam | DefKind::TyParam | DefKind::ConstParam => {
533            genv.tcx().parent(def_id)
534        }
535        _ => bug!("ty_param_owner: {:?} is a {:?} not a type parameter", def_id, def_kind),
536    }
537}
538
539fn variants_of(
540    genv: GlobalEnv,
541    def_id: MaybeExternId,
542) -> QueryResult<rty::Opaqueness<rty::EarlyBinder<rty::PolyVariants>>> {
543    let local_id = def_id.local_id();
544
545    let item = &genv.fhir_expect_item(local_id)?;
546    let variants = match &item.kind {
547        fhir::ItemKind::Enum(enum_def) => {
548            let wfckresults = genv.check_wf(local_id)?;
549            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
550            let variants = cx.conv_enum_variants(def_id, enum_def)?;
551            let variants = rty::List::from_vec(struct_compat::variants(genv, &variants, def_id)?);
552            rty::Opaqueness::Transparent(rty::EarlyBinder(variants))
553        }
554        fhir::ItemKind::Struct(struct_def) => {
555            let wfckresults = genv.check_wf(local_id)?;
556            let mut cx = AfterSortck::new(genv, &wfckresults).into_conv_ctxt();
557            cx.conv_struct_variant(def_id, struct_def)?
558                .map(|variant| -> QueryResult<_> {
559                    let variants = struct_compat::variants(genv, &[variant], def_id)?;
560                    Ok(rty::List::from_vec(variants))
561                })
562                .transpose()?
563                .map(rty::EarlyBinder)
564        }
565        _ => Err(query_bug!(def_id.local_id(), "expected struct or enum"))?,
566    };
567    if config::dump_rty() {
568        dbg::dump_item_info(genv.tcx(), def_id.resolved_id(), "rty", &variants).unwrap();
569    }
570    Ok(variants)
571}
572
573fn fn_sig(genv: GlobalEnv, def_id: MaybeExternId) -> QueryResult<rty::EarlyBinder<rty::PolyFnSig>> {
574    match genv.fhir_node(def_id.local_id())? {
575        fhir::Node::Item(Item { kind: ItemKind::Fn(fhir_fn_sig, ..), .. })
576        | fhir::Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(fhir_fn_sig), .. })
577        | fhir::Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(fhir_fn_sig), .. })
578        | fhir::Node::ForeignItem(ForeignItem {
579            kind: ForeignItemKind::Fn(fhir_fn_sig, ..), ..
580        }) => {
581            let wfckresults = genv.check_wf(def_id.local_id())?;
582            let fn_sig = AfterSortck::new(genv, &wfckresults)
583                .into_conv_ctxt()
584                .conv_fn_sig(def_id, fhir_fn_sig)?;
585            let fn_sig = struct_compat::fn_sig(genv, fhir_fn_sig.decl, &fn_sig, def_id)?;
586            let fn_sig = fn_sig.hoist_input_binders();
587
588            if config::dump_rty() {
589                let generics = genv.generics_of(def_id)?;
590                let refinement_generics = genv.refinement_generics_of(def_id)?;
591                dbg::dump_item_info(
592                    genv.tcx(),
593                    def_id.resolved_id(),
594                    "rty",
595                    (generics, refinement_generics, &fn_sig),
596                )
597                .unwrap();
598            }
599            Ok(rty::EarlyBinder(fn_sig))
600        }
601        fhir::Node::Ctor => {
602            let tcx = genv.tcx();
603            let (adt_id, variant_idx) = match tcx.def_kind(def_id) {
604                DefKind::Ctor(CtorOf::Struct, _) => {
605                    let struct_id = tcx.parent(def_id.resolved_id());
606                    (struct_id, FIRST_VARIANT)
607                }
608                DefKind::Ctor(CtorOf::Variant, _) => {
609                    let variant_id = tcx.parent(def_id.resolved_id());
610                    let enum_id = tcx.parent(variant_id);
611                    let variant_idx = tcx.adt_def(enum_id).variant_index_with_id(variant_id);
612                    (enum_id, variant_idx)
613                }
614                _ => return Err(query_bug!("invalid `DefKind` for ctor node")),
615            };
616            genv.variant_sig(adt_id, variant_idx)?
617                .map(|sig| sig.to_poly_fn_sig(None))
618                .ok_or_query_err(adt_id)
619        }
620        node => Err(query_bug!("fn_sig called on unsupported node {node:?}")),
621    }
622}
623
624fn check_wf(genv: GlobalEnv, def_id: LocalDefId) -> QueryResult<Rc<WfckResults>> {
625    let node = genv.fhir_expect_owner_node(def_id)?;
626    let wfckresults = wf::check_node(genv, &node)?;
627    Ok(Rc::new(wfckresults))
628}
629
630mod errors {
631    use flux_errors::E0999;
632    use flux_macros::Diagnostic;
633    use flux_middle::def_id::FluxLocalDefId;
634    use rustc_span::Span;
635
636    #[derive(Diagnostic)]
637    #[diag(fhir_analysis_definition_cycle, code = E0999)]
638    pub struct DefinitionCycle {
639        #[primary_span]
640        #[label]
641        span: Span,
642        msg: String,
643    }
644
645    impl DefinitionCycle {
646        pub(super) fn new(span: Span, cycle: Vec<FluxLocalDefId>) -> Self {
647            let root = format!("`{}`", cycle[0].name());
648            let names: Vec<String> = cycle.iter().map(|s| format!("`{}`", s.name())).collect();
649            let msg = format!("{} -> {}", names.join(" -> "), root);
650            Self { span, msg }
651        }
652    }
653}
flux_fhir_analysis/lib.rs

flux_fhir_analysis/
lib.rs
