source: src/SymTab/Indexer.cc@ 09ab71a

ADT arm-eh ast-experimental cleanup-dtors enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 09ab71a was 114bde6, checked in by Aaron Moss <a3moss@…>, 7 years ago

Trim old version of removeSpecialOverrides
  • Property mode set to 100644
File size: 24.2 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Indexer.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 21:37:33 2015
11// Last Modified By : Aaron B. Moss
12// Last Modified On : Fri Mar 8 13:55:00 2019
13// Update Count : 21
14//
15
16#include "Indexer.h"
17
18#include <cassert> // for assert, strict_dynamic_cast
19#include <string> // for string, operator<<, operator!=
20#include <memory> // for shared_ptr, make_shared
21#include <unordered_map> // for operator!=, unordered_map<>::const...
22#include <unordered_set> // for unordered_set
23#include <utility> // for pair, make_pair, move
24#include <vector> // for vector
25
26#include "CodeGen/OperatorTable.h" // for isCtorDtor, isCtorDtorAssign
27#include "Common/SemanticError.h" // for SemanticError
28#include "Common/utility.h" // for cloneAll
29#include "Common/Stats/Counter.h" // for counters
30#include "GenPoly/GenPoly.h" // for getFunctionType
31#include "InitTweak/InitTweak.h" // for isConstructor, isCopyFunction, isC...
32#include "Mangler.h" // for Mangler
33#include "Parser/LinkageSpec.h" // for isMangled, isOverridable, Spec
34#include "ResolvExpr/typeops.h" // for typesCompatible
35#include "SynTree/Constant.h" // for Constant
36#include "SynTree/Declaration.h" // for DeclarationWithType, FunctionDecl
37#include "SynTree/Expression.h" // for Expression, ImplicitCopyCtorExpr
38#include "SynTree/Initializer.h" // for Initializer
39#include "SynTree/Statement.h" // for CompoundStmt, Statement, ForStmt (...
40#include "SynTree/Type.h" // for Type, StructInstType, UnionInstType
41
42namespace SymTab {
43
44 // Statistics block
45 namespace {
46 static inline auto stats() {
47 using namespace Stats::Counters;
48 static auto group = build<CounterGroup>("Indexers");
49 static struct {
50 SimpleCounter * count;
51 AverageCounter<double> * size;
52 SimpleCounter * new_scopes;
53 SimpleCounter * lazy_scopes;
54 AverageCounter<double> * avg_scope_depth;
55 MaxCounter<size_t> * max_scope_depth;
56 SimpleCounter * add_calls;
57 SimpleCounter * lookup_calls;
58 SimpleCounter * map_lookups;
59 SimpleCounter * map_mutations;
60 } ret = {
61 .count = build<SimpleCounter>("Count", group),
62 .size = build<AverageCounter<double>>("Average Size", group),
63 .new_scopes = build<SimpleCounter>("Scopes", group),
64 .lazy_scopes = build<SimpleCounter>("Lazy Scopes", group),
65 .avg_scope_depth = build<AverageCounter<double>>("Average Scope", group),
66 .max_scope_depth = build<MaxCounter<size_t>>("Max Scope", group),
67 .add_calls = build<SimpleCounter>("Add Calls", group),
68 .lookup_calls = build<SimpleCounter>("Lookup Calls", group),
69 .map_lookups = build<SimpleCounter>("Map Lookups", group),
70 .map_mutations = build<SimpleCounter>("Map Mutations", group)
71 };
72 return ret;
73 }
74 }
75
76 Indexer::Indexer()
77 : idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable(),
78 prevScope(), scope( 0 ), repScope( 0 ) { ++*stats().count; }
79
80 Indexer::~Indexer() {
81 stats().size->push( idTable ? idTable->size() : 0 );
82 }
83
84 void Indexer::lazyInitScope() {
85 if ( repScope < scope ) {
86 ++*stats().lazy_scopes;
87 // create rollback
88 prevScope = std::make_shared<Indexer>( *this );
89 // update repScope
90 repScope = scope;
91 }
92 }
93
94 void Indexer::enterScope() {
95 ++scope;
96
97 ++*stats().new_scopes;
98 stats().avg_scope_depth->push( scope );
99 stats().max_scope_depth->push( scope );
100 }
101
102 void Indexer::leaveScope() {
103 if ( repScope == scope ) {
104 Ptr prev = prevScope; // make sure prevScope stays live
105 *this = std::move(*prevScope); // replace with previous scope
106 }
107
108 --scope;
109 }
110
111 void Indexer::lookupId( const std::string &id, std::list< IdData > &out ) const {
112 ++*stats().lookup_calls;
113 if ( ! idTable ) return;
114
115 ++*stats().map_lookups;
116 auto decls = idTable->find( id );
117 if ( decls == idTable->end() ) return;
118
119 for ( auto decl : *(decls->second) ) {
120 out.push_back( decl.second );
121 }
122 }
123
124 NamedTypeDecl *Indexer::lookupType( const std::string &id ) const {
125 ++*stats().lookup_calls;
126 if ( ! typeTable ) return nullptr;
127 ++*stats().map_lookups;
128 auto it = typeTable->find( id );
129 return it == typeTable->end() ? nullptr : it->second.decl;
130 }
131
132 StructDecl *Indexer::lookupStruct( const std::string &id ) const {
133 ++*stats().lookup_calls;
134 if ( ! structTable ) return nullptr;
135 ++*stats().map_lookups;
136 auto it = structTable->find( id );
137 return it == structTable->end() ? nullptr : it->second.decl;
138 }
139
140 EnumDecl *Indexer::lookupEnum( const std::string &id ) const {
141 ++*stats().lookup_calls;
142 if ( ! enumTable ) return nullptr;
143 ++*stats().map_lookups;
144 auto it = enumTable->find( id );
145 return it == enumTable->end() ? nullptr : it->second.decl;
146 }
147
148 UnionDecl *Indexer::lookupUnion( const std::string &id ) const {
149 ++*stats().lookup_calls;
150 if ( ! unionTable ) return nullptr;
151 ++*stats().map_lookups;
152 auto it = unionTable->find( id );
153 return it == unionTable->end() ? nullptr : it->second.decl;
154 }
155
156 TraitDecl *Indexer::lookupTrait( const std::string &id ) const {
157 ++*stats().lookup_calls;
158 if ( ! traitTable ) return nullptr;
159 ++*stats().map_lookups;
160 auto it = traitTable->find( id );
161 return it == traitTable->end() ? nullptr : it->second.decl;
162 }
163
164 const Indexer* Indexer::atScope( unsigned long target ) const {
165 // by lazy construction, final indexer in list has repScope 0, cannot be > target
166 // otherwise, will find first scope representing the target
167 const Indexer* indexer = this;
168 while ( indexer->repScope > target ) {
169 indexer = indexer->prevScope.get();
170 }
171 return indexer;
172 }
173
174 NamedTypeDecl *Indexer::globalLookupType( const std::string &id ) const {
175 return atScope( 0 )->lookupType( id );
176 }
177
178 StructDecl *Indexer::globalLookupStruct( const std::string &id ) const {
179 return atScope( 0 )->lookupStruct( id );
180 }
181
182 UnionDecl *Indexer::globalLookupUnion( const std::string &id ) const {
183 return atScope( 0 )->lookupUnion( id );
184 }
185
186 EnumDecl *Indexer::globalLookupEnum( const std::string &id ) const {
187 return atScope( 0 )->lookupEnum( id );
188 }
189
190 bool isFunction( DeclarationWithType * decl ) {
191 return GenPoly::getFunctionType( decl->get_type() );
192 }
193
194 bool isObject( DeclarationWithType * decl ) {
195 return ! isFunction( decl );
196 }
197
198 bool isDefinition( DeclarationWithType * decl ) {
199 if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) {
200 // a function is a definition if it has a body
201 return func->statements;
202 } else {
203 // an object is a definition if it is not marked extern.
204 // both objects must be marked extern
205 return ! decl->get_storageClasses().is_extern;
206 }
207 }
208
209
210 bool Indexer::addedIdConflicts(
211 const Indexer::IdData & existing, DeclarationWithType *added,
212 Indexer::OnConflict handleConflicts, BaseSyntaxNode * deleteStmt ) {
213 // if we're giving the same name mangling to things of different types then there is
214 // something wrong
215 assert( (isObject( added ) && isObject( existing.id ) )
216 || ( isFunction( added ) && isFunction( existing.id ) ) );
217
218 if ( LinkageSpec::isOverridable( existing.id->linkage ) ) {
219 // new definition shadows the autogenerated one, even at the same scope
220 return false;
221 } else if ( LinkageSpec::isMangled( added->linkage )
222 || ResolvExpr::typesCompatible(
223 added->get_type(), existing.id->get_type(), Indexer() ) ) {
224
225 // it is a conflict if one declaration is deleted and the other is not
226 if ( deleteStmt && ! existing.deleteStmt ) {
227 if ( handleConflicts.mode == OnConflict::Error ) {
228 SemanticError( added, "deletion of defined identifier " );
229 }
230 return true;
231 } else if ( ! deleteStmt && existing.deleteStmt ) {
232 if ( handleConflicts.mode == OnConflict::Error ) {
233 SemanticError( added, "definition of deleted identifier " );
234 }
235 return true;
236 }
237
238 if ( isDefinition( added ) && isDefinition( existing.id ) ) {
239 if ( handleConflicts.mode == OnConflict::Error ) {
240 SemanticError( added,
241 isFunction( added ) ?
242 "duplicate function definition for " :
243 "duplicate object definition for " );
244 }
245 return true;
246 } // if
247 } else {
248 if ( handleConflicts.mode == OnConflict::Error ) {
249 SemanticError( added, "duplicate definition for " );
250 }
251 return true;
252 } // if
253
254 return true;
255 }
256
257 bool Indexer::hasCompatibleCDecl( const std::string &id, const std::string &mangleName ) const {
258 if ( ! idTable ) return false;
259
260 ++*stats().map_lookups;
261 auto decls = idTable->find( id );
262 if ( decls == idTable->end() ) return false;
263
264 for ( auto decl : *(decls->second) ) {
265 // skip other scopes (hidden by this decl)
266 if ( decl.second.scope != scope ) continue;
267 // check for C decl with compatible type (by mangleName)
268 if ( ! LinkageSpec::isMangled( decl.second.id->linkage ) && decl.first == mangleName ) {
269 return true;
270 }
271 }
272
273 return false;
274 }
275
276 bool Indexer::hasIncompatibleCDecl(
277 const std::string &id, const std::string &mangleName ) const {
278 if ( ! idTable ) return false;
279
280 ++*stats().map_lookups;
281 auto decls = idTable->find( id );
282 if ( decls == idTable->end() ) return false;
283
284 for ( auto decl : *(decls->second) ) {
285 // skip other scopes (hidden by this decl)
286 if ( decl.second.scope != scope ) continue;
287 // check for C decl with incompatible type (by manglename)
288 if ( ! LinkageSpec::isMangled( decl.second.id->linkage ) && decl.first != mangleName ) {
289 return true;
290 }
291 }
292
293 return false;
294 }
295
296 /// gets the base type of the first parameter; decl must be a ctor/dtor/assignment function
297 std::string getOtypeKey( FunctionDecl* function ) {
298 auto& params = function->type->parameters;
299 assert( ! params.empty() );
300 // use base type of pointer, so that qualifiers on the pointer type aren't considered.
301 Type* base = InitTweak::getPointerBase( params.front()->get_type() );
302 assert( base );
303 return Mangler::mangle( base );
304 }
305
306 /// gets the declaration for the function acting on a type specified by otype key,
307 /// nullptr if none such
308 FunctionDecl * getFunctionForOtype( DeclarationWithType * decl, const std::string& otypeKey ) {
309 FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl );
310 if ( ! func || otypeKey != getOtypeKey( func ) ) return nullptr;
311 return func;
312 }
313
314 bool Indexer::removeSpecialOverrides(
315 Indexer::IdData& data, Indexer::MangleTable::Ptr& mangleTable ) {
316 // if a type contains user defined ctor/dtor/assign, then special rules trigger, which
317 // determinethe set of ctor/dtor/assign that can be used by the requester. In particular,
318 // if the user defines a default ctor, then the generated default ctor is unavailable,
319 // likewise for copy ctor and dtor. If the user defines any ctor/dtor, then no generated
320 // field ctors are available. If the user defines any ctor then the generated default ctor
321 // is unavailable (intrinsic default ctor must be overridden exactly). If the user defines
322 // anything that looks like a copy constructor, then the generated copy constructor is
323 // unavailable, and likewise for the assignment operator.
324
325 // only relevant on function declarations
326 FunctionDecl * function = dynamic_cast< FunctionDecl * >( data.id );
327 if ( ! function ) return true;
328 // only need to perform this check for constructors, destructors, and assignment functions
329 if ( ! CodeGen::isCtorDtorAssign( data.id->name ) ) return true;
330
331 // set up information for this type
332 bool dataIsUserDefinedFunc = ! LinkageSpec::isOverridable( function->linkage );
333 bool dataIsCopyFunc = InitTweak::isCopyFunction( function, function->name );
334 std::string dataOtypeKey = getOtypeKey( function );
335
336 if ( dataIsUserDefinedFunc && dataIsCopyFunc ) {
337 // this is a user-defined copy function
338 // if this is the first such, delete/remove non-user-defined overloads as needed
339 std::vector< std::string > removed;
340 std::vector< MangleTable::value_type > deleted;
341 bool alreadyUserDefinedFunc = false;
342
343 for ( const auto& entry : *mangleTable ) {
344 // skip decls that aren't functions or are for the wrong type
345 FunctionDecl * decl = getFunctionForOtype( entry.second.id, dataOtypeKey );
346 if ( ! decl ) continue;
347
348 bool isCopyFunc = InitTweak::isCopyFunction( decl, decl->name );
349 if ( ! LinkageSpec::isOverridable( decl->linkage ) ) {
350 // matching user-defined function
351 if ( isCopyFunc ) {
352 // mutation already performed, return early
353 return true;
354 } else {
355 // note that non-copy deletions already performed
356 alreadyUserDefinedFunc = true;
357 }
358 } else {
359 // non-user-defined function; mark for deletion/removal as appropriate
360 if ( isCopyFunc ) {
361 removed.push_back( entry.first );
362 } else if ( ! alreadyUserDefinedFunc ) {
363 deleted.push_back( entry );
364 }
365 }
366 }
367
368 // perform removals from mangle table, and deletions if necessary
369 for ( const auto& key : removed ) {
370 ++*stats().map_mutations;
371 mangleTable = mangleTable->erase( key );
372 }
373 if ( ! alreadyUserDefinedFunc ) for ( const auto& entry : deleted ) {
374 ++*stats().map_mutations;
375 mangleTable = mangleTable->set( entry.first, IdData{ entry.second, function } );
376 }
377 } else if ( dataIsUserDefinedFunc ) {
378 // this is a user-defined non-copy function
379 // if this is the first user-defined function, delete non-user-defined overloads
380 std::vector< MangleTable::value_type > deleted;
381
382 for ( const auto& entry : *mangleTable ) {
383 // skip decls that aren't functions or are for the wrong type
384 FunctionDecl * decl = getFunctionForOtype( entry.second.id, dataOtypeKey );
385 if ( ! decl ) continue;
386
387 // exit early if already a matching user-defined function;
388 // earlier function will have mutated table
389 if ( ! LinkageSpec::isOverridable( decl->linkage ) ) return true;
390
391 // skip mutating intrinsic functions
392 if ( decl->linkage == LinkageSpec::Intrinsic ) continue;
393
394 // user-defined non-copy functions do not override copy functions
395 if ( InitTweak::isCopyFunction( decl, decl->name ) ) continue;
396
397 // this function to be deleted after mangleTable iteration is complete
398 deleted.push_back( entry );
399 }
400
401 // mark deletions to update mangle table
402 // this needs to be a separate loop because of iterator invalidation
403 for ( const auto& entry : deleted ) {
404 ++*stats().map_mutations;
405 mangleTable = mangleTable->set( entry.first, IdData{ entry.second, function } );
406 }
407 } else if ( function->linkage != LinkageSpec::Intrinsic ) {
408 // this is an overridable generated function
409 // if there already exists a matching user-defined function, delete this appropriately
410 for ( const auto& entry : *mangleTable ) {
411 // skip decls that aren't functions or are for the wrong type
412 FunctionDecl * decl = getFunctionForOtype( entry.second.id, dataOtypeKey );
413 if ( ! decl ) continue;
414
415 // skip non-user-defined functions
416 if ( LinkageSpec::isOverridable( decl->linkage ) ) continue;
417
418 if ( dataIsCopyFunc ) {
419 // remove current function if exists a user-defined copy function
420 // since the signatures for copy functions don't need to match exactly, using
421 // a delete statement is the wrong approach
422 if ( InitTweak::isCopyFunction( decl, decl->name ) ) return false;
423 } else {
424 // mark current function deleted by first user-defined function found
425 data.deleteStmt = decl;
426 return true;
427 }
428 }
429 }
430
431 // nothing (more) to fix, return true
432 return true;
433 }
434
435 void Indexer::addId(
436 DeclarationWithType *decl, OnConflict handleConflicts, Expression * baseExpr,
437 BaseSyntaxNode * deleteStmt ) {
438 ++*stats().add_calls;
439 const std::string &name = decl->name;
440 if ( name == "" ) return;
441
442 std::string mangleName;
443 if ( LinkageSpec::isOverridable( decl->linkage ) ) {
444 // mangle the name without including the appropriate suffix, so overridable routines
445 // are placed into the same "bucket" as their user defined versions.
446 mangleName = Mangler::mangle( decl, false );
447 } else {
448 mangleName = Mangler::mangle( decl );
449 } // if
450
451 // this ensures that no two declarations with the same unmangled name at the same scope
452 // both have C linkage
453 if ( LinkageSpec::isMangled( decl->linkage ) ) {
454 // Check that a Cforall declaration doesn't override any C declaration
455 if ( hasCompatibleCDecl( name, mangleName ) ) {
456 SemanticError( decl, "Cforall declaration hides C function " );
457 }
458 } else {
459 // NOTE: only correct if name mangling is completely isomorphic to C
460 // type-compatibility, which it may not be.
461 if ( hasIncompatibleCDecl( name, mangleName ) ) {
462 SemanticError( decl, "conflicting overload of C function " );
463 }
464 }
465
466 // ensure tables exist and add identifier
467 MangleTable::Ptr mangleTable;
468 if ( ! idTable ) {
469 idTable = IdTable::new_ptr();
470 mangleTable = MangleTable::new_ptr();
471 } else {
472 ++*stats().map_lookups;
473 auto decls = idTable->find( name );
474 if ( decls == idTable->end() ) {
475 mangleTable = MangleTable::new_ptr();
476 } else {
477 mangleTable = decls->second;
478 // skip in-scope repeat declarations of same identifier
479 ++*stats().map_lookups;
480 auto existing = mangleTable->find( mangleName );
481 if ( existing != mangleTable->end()
482 && existing->second.scope == scope
483 && existing->second.id ) {
484 if ( addedIdConflicts( existing->second, decl, handleConflicts, deleteStmt ) ) {
485 if ( handleConflicts.mode == OnConflict::Delete ) {
486 // set delete expression for conflicting identifier
487 lazyInitScope();
488 *stats().map_mutations += 2;
489 idTable = idTable->set(
490 name,
491 mangleTable->set(
492 mangleName,
493 IdData{ existing->second, handleConflicts.deleteStmt } ) );
494 }
495 return;
496 }
497 }
498 }
499 }
500
501 // add/overwrite with new identifier
502 lazyInitScope();
503 IdData data{ decl, baseExpr, deleteStmt, scope };
504 // Ensure that auto-generated ctor/dtor/assignment are deleted if necessary
505 if ( ! removeSpecialOverrides( data, mangleTable ) ) return;
506 *stats().map_mutations += 2;
507 idTable = idTable->set( name, mangleTable->set( mangleName, std::move(data) ) );
508 }
509
510 void Indexer::addId( DeclarationWithType * decl, Expression * baseExpr ) {
511 // default handling of conflicts is to raise an error
512 addId( decl, OnConflict::error(), baseExpr, decl->isDeleted ? decl : nullptr );
513 }
514
515 void Indexer::addDeletedId( DeclarationWithType * decl, BaseSyntaxNode * deleteStmt ) {
516 // default handling of conflicts is to raise an error
517 addId( decl, OnConflict::error(), nullptr, deleteStmt );
518 }
519
520 bool addedTypeConflicts( NamedTypeDecl *existing, NamedTypeDecl *added ) {
521 if ( existing->base == nullptr ) {
522 return false;
523 } else if ( added->base == nullptr ) {
524 return true;
525 } else {
526 assert( existing->base && added->base );
527 // typedef redeclarations are errors only if types are different
528 if ( ! ResolvExpr::typesCompatible( existing->base, added->base, Indexer() ) ) {
529 SemanticError( added->location, "redeclaration of " + added->name );
530 }
531 }
532 // does not need to be added to the table if both existing and added have a base that are
533 // the same
534 return true;
535 }
536
537 void Indexer::addType( NamedTypeDecl *decl ) {
538 ++*stats().add_calls;
539 const std::string &id = decl->name;
540
541 if ( ! typeTable ) {
542 typeTable = TypeTable::new_ptr();
543 } else {
544 ++*stats().map_lookups;
545 auto existing = typeTable->find( id );
546 if ( existing != typeTable->end()
547 && existing->second.scope == scope
548 && addedTypeConflicts( existing->second.decl, decl ) ) return;
549 }
550
551 lazyInitScope();
552 ++*stats().map_mutations;
553 typeTable = typeTable->set( id, Scoped<NamedTypeDecl>{ decl, scope } );
554 }
555
556 bool addedDeclConflicts( AggregateDecl *existing, AggregateDecl *added ) {
557 if ( ! existing->body ) {
558 return false;
559 } else if ( added->body ) {
560 SemanticError( added, "redeclaration of " );
561 } // if
562 return true;
563 }
564
565 void Indexer::addStruct( const std::string &id ) {
566 addStruct( new StructDecl( id ) );
567 }
568
569 void Indexer::addStruct( StructDecl *decl ) {
570 ++*stats().add_calls;
571 const std::string &id = decl->name;
572
573 if ( ! structTable ) {
574 structTable = StructTable::new_ptr();
575 } else {
576 ++*stats().map_lookups;
577 auto existing = structTable->find( id );
578 if ( existing != structTable->end()
579 && existing->second.scope == scope
580 && addedDeclConflicts( existing->second.decl, decl ) ) return;
581 }
582
583 lazyInitScope();
584 ++*stats().map_mutations;
585 structTable = structTable->set( id, Scoped<StructDecl>{ decl, scope } );
586 }
587
588 void Indexer::addEnum( EnumDecl *decl ) {
589 ++*stats().add_calls;
590 const std::string &id = decl->name;
591
592 if ( ! enumTable ) {
593 enumTable = EnumTable::new_ptr();
594 } else {
595 ++*stats().map_lookups;
596 auto existing = enumTable->find( id );
597 if ( existing != enumTable->end()
598 && existing->second.scope == scope
599 && addedDeclConflicts( existing->second.decl, decl ) ) return;
600 }
601
602 lazyInitScope();
603 ++*stats().map_mutations;
604 enumTable = enumTable->set( id, Scoped<EnumDecl>{ decl, scope } );
605 }
606
607 void Indexer::addUnion( const std::string &id ) {
608 addUnion( new UnionDecl( id ) );
609 }
610
611 void Indexer::addUnion( UnionDecl *decl ) {
612 ++*stats().add_calls;
613 const std::string &id = decl->name;
614
615 if ( ! unionTable ) {
616 unionTable = UnionTable::new_ptr();
617 } else {
618 ++*stats().map_lookups;
619 auto existing = unionTable->find( id );
620 if ( existing != unionTable->end()
621 && existing->second.scope == scope
622 && addedDeclConflicts( existing->second.decl, decl ) ) return;
623 }
624
625 lazyInitScope();
626 ++*stats().map_mutations;
627 unionTable = unionTable->set( id, Scoped<UnionDecl>{ decl, scope } );
628 }
629
630 void Indexer::addTrait( TraitDecl *decl ) {
631 ++*stats().add_calls;
632 const std::string &id = decl->name;
633
634 if ( ! traitTable ) {
635 traitTable = TraitTable::new_ptr();
636 } else {
637 ++*stats().map_lookups;
638 auto existing = traitTable->find( id );
639 if ( existing != traitTable->end()
640 && existing->second.scope == scope
641 && addedDeclConflicts( existing->second.decl, decl ) ) return;
642 }
643
644 lazyInitScope();
645 ++*stats().map_mutations;
646 traitTable = traitTable->set( id, Scoped<TraitDecl>{ decl, scope } );
647 }
648
649 void Indexer::addMembers( AggregateDecl * aggr, Expression * expr,
650 OnConflict handleConflicts ) {
651 for ( Declaration * decl : aggr->members ) {
652 if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
653 addId( dwt, handleConflicts, expr );
654 if ( dwt->name == "" ) {
655 Type * t = dwt->get_type()->stripReferences();
656 if ( dynamic_cast<StructInstType*>( t ) || dynamic_cast<UnionInstType*>( t ) ) {
657 Expression * base = expr->clone();
658 ResolvExpr::Cost cost = ResolvExpr::Cost::zero; // xxx - carry this cost into the indexer as a base cost?
659 ResolvExpr::referenceToRvalueConversion( base, cost );
660 addMembers( t->getAggr(), new MemberExpr( dwt, base ), handleConflicts );
661 }
662 }
663 }
664 }
665 }
666
667 void Indexer::addWith( std::list< Expression * > & withExprs, BaseSyntaxNode * withStmt ) {
668 for ( Expression * expr : withExprs ) {
669 if ( expr->result ) {
670 AggregateDecl * aggr = expr->result->stripReferences()->getAggr();
671 assertf( aggr, "WithStmt expr has non-aggregate type: %s", toString( expr->result ).c_str() );
672
673 addMembers( aggr, expr, OnConflict::deleteWith( withStmt ) );
674 }
675 }
676 }
677
678 void Indexer::addIds( const std::list< DeclarationWithType * > & decls ) {
679 for ( auto d : decls ) {
680 addId( d );
681 }
682 }
683
684 void Indexer::addTypes( const std::list< TypeDecl * > & tds ) {
685 for ( auto td : tds ) {
686 addType( td );
687 addIds( td->assertions );
688 }
689 }
690
691 void Indexer::addFunctionType( FunctionType * ftype ) {
692 addTypes( ftype->forall );
693 addIds( ftype->returnVals );
694 addIds( ftype->parameters );
695 }
696
697 Expression * Indexer::IdData::combine( ResolvExpr::Cost & cost ) const {
698 Expression * ret = nullptr;
699 if ( baseExpr ) {
700 Expression * base = baseExpr->clone();
701 ResolvExpr::referenceToRvalueConversion( base, cost );
702 ret = new MemberExpr( id, base );
703 // xxx - this introduces hidden environments, for now remove them.
704 // std::swap( base->env, ret->env );
705 delete base->env;
706 base->env = nullptr;
707 } else {
708 ret = new VariableExpr( id );
709 }
710 if ( deleteStmt ) ret = new DeletedExpr( ret, deleteStmt );
711 return ret;
712 }
713} // namespace SymTab
714
715// Local Variables: //
716// tab-width: 4 //
717// mode: c++ //
718// compile-command: "make install" //
719// End: //
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