source: src/SymTab/Indexer.cc@ c653b37

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr no_list persistent-indexer pthread-emulation qualifiedEnum
Last change on this file since c653b37 was ed34540, checked in by Rob Schluntz <rschlunt@…>, 7 years ago

Update Indexer handling for typedefs
  • Property mode set to 100644
File size: 28.7 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 : Peter A. Buhr
12// Last Modified On : Thu Aug 17 16:08:40 2017
13// Update Count : 20
14//
15
16#include "Indexer.h"
17
18#include <cassert> // for assert, strict_dynamic_cast
19#include <iostream> // for operator<<, basic_ostream, ostream
20#include <string> // for string, operator<<, operator!=
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
25#include "CodeGen/OperatorTable.h" // for isCtorDtor, isCtorDtorAssign
26#include "Common/SemanticError.h" // for SemanticError
27#include "Common/utility.h" // for cloneAll
28#include "GenPoly/GenPoly.h"
29#include "InitTweak/InitTweak.h" // for isConstructor, isCopyFunction, isC...
30#include "Mangler.h" // for Mangler
31#include "Parser/LinkageSpec.h" // for isMangled, isOverridable, Spec
32#include "ResolvExpr/typeops.h" // for typesCompatible
33#include "SynTree/Constant.h" // for Constant
34#include "SynTree/Declaration.h" // for DeclarationWithType, FunctionDecl
35#include "SynTree/Expression.h" // for Expression, ImplicitCopyCtorExpr
36#include "SynTree/Initializer.h" // for Initializer
37#include "SynTree/Statement.h" // for CompoundStmt, Statement, ForStmt (...
38#include "SynTree/Type.h" // for Type, StructInstType, UnionInstType
39
40#define debugPrint(x) if ( doDebug ) { std::cerr << x; }
41
42namespace SymTab {
43 std::ostream & operator<<( std::ostream & out, const Indexer::IdData & data ) {
44 return out << "(" << data.id << "," << data.baseExpr << ")";
45 }
46
47 typedef std::unordered_map< std::string, Indexer::IdData > MangleTable;
48 typedef std::unordered_map< std::string, MangleTable > IdTable;
49 typedef std::unordered_map< std::string, NamedTypeDecl* > TypeTable;
50 typedef std::unordered_map< std::string, StructDecl* > StructTable;
51 typedef std::unordered_map< std::string, EnumDecl* > EnumTable;
52 typedef std::unordered_map< std::string, UnionDecl* > UnionTable;
53 typedef std::unordered_map< std::string, TraitDecl* > TraitTable;
54
55 void dump( const IdTable &table, std::ostream &os ) {
56 for ( IdTable::const_iterator id = table.begin(); id != table.end(); ++id ) {
57 for ( MangleTable::const_iterator mangle = id->second.begin(); mangle != id->second.end(); ++mangle ) {
58 os << mangle->second << std::endl;
59 }
60 }
61 }
62
63 template< typename Decl >
64 void dump( const std::unordered_map< std::string, Decl* > &table, std::ostream &os ) {
65 for ( typename std::unordered_map< std::string, Decl* >::const_iterator it = table.begin(); it != table.end(); ++it ) {
66 os << it->second << std::endl;
67 } // for
68 }
69
70 struct Indexer::Impl {
71 Impl( unsigned long _scope ) : refCount(1), scope( _scope ), size( 0 ), base(),
72 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
73 Impl( unsigned long _scope, Indexer &&_base ) : refCount(1), scope( _scope ), size( 0 ), base( _base ),
74 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
75 unsigned long refCount; ///< Number of references to these tables
76 unsigned long scope; ///< Scope these tables are associated with
77 unsigned long size; ///< Number of elements stored in this table
78 const Indexer base; ///< Base indexer this extends
79
80 IdTable idTable; ///< Identifier namespace
81 TypeTable typeTable; ///< Type namespace
82 StructTable structTable; ///< Struct namespace
83 EnumTable enumTable; ///< Enum namespace
84 UnionTable unionTable; ///< Union namespace
85 TraitTable traitTable; ///< Trait namespace
86 };
87
88 Indexer::Impl *Indexer::newRef( Indexer::Impl *toClone ) {
89 if ( ! toClone ) return 0;
90
91 // shorten the search chain by skipping empty links
92 Indexer::Impl *ret = toClone->size == 0 ? toClone->base.tables : toClone;
93 if ( ret ) { ++ret->refCount; }
94
95 return ret;
96 }
97
98 void Indexer::deleteRef( Indexer::Impl *toFree ) {
99 if ( ! toFree ) return;
100
101 if ( --toFree->refCount == 0 ) delete toFree;
102 }
103
104 void Indexer::removeSpecialOverrides( const std::string &id, std::list< IdData > & out ) const {
105 // only need to perform this step for constructors, destructors, and assignment functions
106 if ( ! CodeGen::isCtorDtorAssign( id ) ) return;
107
108 // helpful data structure to organize properties for a type
109 struct ValueType {
110 struct DeclBall { // properties for this particular decl
111 IdData decl;
112 bool isUserDefinedFunc;
113 bool isCopyFunc;
114 };
115 // properties for this type
116 bool existsUserDefinedCopyFunc = false; // user-defined copy ctor found
117 BaseSyntaxNode * deleteStmt = nullptr; // non-null if a user-defined function is found
118 std::list< DeclBall > decls;
119
120 // another FunctionDecl for the current type was found - determine
121 // if it has special properties and update data structure accordingly
122 ValueType & operator+=( IdData data ) {
123 DeclarationWithType * function = data.id;
124 bool isUserDefinedFunc = ! LinkageSpec::isOverridable( function->linkage );
125 bool isCopyFunc = InitTweak::isCopyFunction( function, function->name );
126 decls.push_back( DeclBall{ data, isUserDefinedFunc, isCopyFunc } );
127 existsUserDefinedCopyFunc = existsUserDefinedCopyFunc || (isUserDefinedFunc && isCopyFunc);
128 if ( isUserDefinedFunc && ! deleteStmt ) {
129 // any user-defined function can act as an implicit delete statement for generated constructors.
130 // a delete stmt should not act as an implicit delete statement.
131 deleteStmt = data.id;
132 }
133 return *this;
134 }
135 }; // ValueType
136
137 std::list< IdData > copy;
138 copy.splice( copy.end(), out );
139
140 // organize discovered declarations by type
141 std::unordered_map< std::string, ValueType > funcMap;
142 for ( auto decl : copy ) {
143 if ( FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl.id ) ) {
144 std::list< DeclarationWithType * > & params = function->type->parameters;
145 assert( ! params.empty() );
146 // use base type of pointer, so that qualifiers on the pointer type aren't considered.
147 Type * base = InitTweak::getPointerBase( params.front()->get_type() );
148 assert( base );
149 funcMap[ Mangler::mangle( base ) ] += decl;
150 } else {
151 out.push_back( decl );
152 }
153 }
154
155 // if a type contains user defined ctor/dtor/assign, then special rules trigger, which determine
156 // the set of ctor/dtor/assign that can be used by the requester. In particular, if the user defines
157 // a default ctor, then the generated default ctor is unavailable, likewise for copy ctor
158 // and dtor. If the user defines any ctor/dtor, then no generated field ctors are available.
159 // If the user defines any ctor then the generated default ctor is unavailable (intrinsic default
160 // ctor must be overridden exactly). If the user defines anything that looks like a copy constructor,
161 // then the generated copy constructor is unavailable, and likewise for the assignment operator.
162 for ( std::pair< const std::string, ValueType > & pair : funcMap ) {
163 ValueType & val = pair.second;
164 for ( ValueType::DeclBall ball : val.decls ) {
165 bool isNotUserDefinedFunc = ! ball.isUserDefinedFunc && ball.decl.id->linkage != LinkageSpec::Intrinsic;
166 bool isCopyFunc = ball.isCopyFunc;
167 bool existsUserDefinedCopyFunc = val.existsUserDefinedCopyFunc;
168
169 // only implicitly delete non-user defined functions that are not intrinsic, and are
170 // not copy functions (assignment or copy constructor). If a user-defined copy function exists,
171 // do not pass along the non-user-defined copy functions since signatures do not have to match,
172 // and the generated functions will often be cheaper.
173 if ( isNotUserDefinedFunc ) {
174 if ( isCopyFunc ) {
175 // Skip over non-user-defined copy functions when there is a user-defined copy function.
176 // Since their signatures do not have to be exact, deleting them is the wrong choice.
177 if ( existsUserDefinedCopyFunc ) continue;
178 } else {
179 // delete non-user-defined non-copy functions if applicable.
180 // deleteStmt will be non-null only if a user-defined function is found.
181 ball.decl.deleteStmt = val.deleteStmt;
182 }
183 }
184 out.push_back( ball.decl );
185 }
186 }
187 }
188
189 void Indexer::makeWritable() {
190 if ( ! tables ) {
191 // create indexer if not yet set
192 tables = new Indexer::Impl( scope );
193 } else if ( tables->refCount > 1 || tables->scope != scope ) {
194 // make this indexer the base of a fresh indexer at the current scope
195 tables = new Indexer::Impl( scope, std::move( *this ) );
196 }
197 }
198
199 Indexer::Indexer() : tables( 0 ), scope( 0 ) {}
200
201 Indexer::Indexer( const Indexer &that ) : doDebug( that.doDebug ), tables( newRef( that.tables ) ), scope( that.scope ) {}
202
203 Indexer::Indexer( Indexer &&that ) : doDebug( that.doDebug ), tables( that.tables ), scope( that.scope ) {
204 that.tables = 0;
205 }
206
207 Indexer::~Indexer() {
208 deleteRef( tables );
209 }
210
211 Indexer& Indexer::operator= ( const Indexer &that ) {
212 deleteRef( tables );
213
214 tables = newRef( that.tables );
215 scope = that.scope;
216 doDebug = that.doDebug;
217
218 return *this;
219 }
220
221 Indexer& Indexer::operator= ( Indexer &&that ) {
222 deleteRef( tables );
223
224 tables = that.tables;
225 scope = that.scope;
226 doDebug = that.doDebug;
227
228 that.tables = 0;
229
230 return *this;
231 }
232
233 void Indexer::lookupId( const std::string &id, std::list< IdData > &out ) const {
234 std::unordered_set< std::string > foundMangleNames;
235
236 Indexer::Impl *searchTables = tables;
237 while ( searchTables ) {
238
239 IdTable::const_iterator decls = searchTables->idTable.find( id );
240 if ( decls != searchTables->idTable.end() ) {
241 const MangleTable &mangleTable = decls->second;
242 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
243 // mark the mangled name as found, skipping this insertion if a declaration for that name has already been found
244 if ( foundMangleNames.insert( decl->first ).second == false ) continue;
245
246 out.push_back( decl->second );
247 }
248 }
249
250 // get declarations from base indexers
251 searchTables = searchTables->base.tables;
252 }
253
254 // some special functions, e.g. constructors and destructors
255 // remove autogenerated functions when they are defined so that
256 // they can never be matched
257 removeSpecialOverrides( id, out );
258 }
259
260 NamedTypeDecl *Indexer::lookupType( const std::string &id ) const {
261 if ( ! tables ) return 0;
262
263 TypeTable::const_iterator ret = tables->typeTable.find( id );
264 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupType( id );
265 }
266
267 StructDecl *Indexer::lookupStruct( const std::string &id ) const {
268 if ( ! tables ) return 0;
269
270 StructTable::const_iterator ret = tables->structTable.find( id );
271 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStruct( id );
272 }
273
274 NamedTypeDecl *Indexer::globalLookupType( const std::string &id ) const {
275 return lookupTypeAtScope( id, 0 );
276 }
277
278 StructDecl *Indexer::globalLookupStruct( const std::string &id ) const {
279 return lookupStructAtScope( id, 0 );
280 }
281
282 UnionDecl *Indexer::globalLookupUnion( const std::string &id ) const {
283 return lookupUnionAtScope( id, 0 );
284 }
285
286 EnumDecl *Indexer::globalLookupEnum( const std::string &id ) const {
287 return lookupEnumAtScope( id, 0 );
288 }
289
290 EnumDecl *Indexer::lookupEnum( const std::string &id ) const {
291 if ( ! tables ) return 0;
292
293 EnumTable::const_iterator ret = tables->enumTable.find( id );
294 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnum( id );
295 }
296
297 UnionDecl *Indexer::lookupUnion( const std::string &id ) const {
298 if ( ! tables ) return 0;
299
300 UnionTable::const_iterator ret = tables->unionTable.find( id );
301 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnion( id );
302 }
303
304 TraitDecl *Indexer::lookupTrait( const std::string &id ) const {
305 if ( ! tables ) return 0;
306
307 TraitTable::const_iterator ret = tables->traitTable.find( id );
308 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTrait( id );
309 }
310
311 const Indexer::IdData * Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
312 if ( ! tables ) return nullptr;
313 if ( tables->scope < scope ) return nullptr;
314
315 IdTable::const_iterator decls = tables->idTable.find( id );
316 if ( decls != tables->idTable.end() ) {
317 const MangleTable &mangleTable = decls->second;
318 MangleTable::const_iterator decl = mangleTable.find( mangleName );
319 if ( decl != mangleTable.end() ) return &decl->second;
320 }
321
322 return tables->base.lookupIdAtScope( id, mangleName, scope );
323 }
324
325 Indexer::IdData * Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) {
326 return const_cast<IdData *>(const_cast<const Indexer *>(this)->lookupIdAtScope( id, mangleName, scope ));
327 }
328
329 bool Indexer::hasIncompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
330 if ( ! tables ) return false;
331 if ( tables->scope < scope ) return false;
332
333 IdTable::const_iterator decls = tables->idTable.find( id );
334 if ( decls != tables->idTable.end() ) {
335 const MangleTable &mangleTable = decls->second;
336 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
337 // check for C decls with the same name, skipping those with a compatible type (by mangleName)
338 if ( ! LinkageSpec::isMangled( decl->second.id->get_linkage() ) && decl->first != mangleName ) return true;
339 }
340 }
341
342 return tables->base.hasIncompatibleCDecl( id, mangleName, scope );
343 }
344
345 bool Indexer::hasCompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
346 if ( ! tables ) return false;
347 if ( tables->scope < scope ) return false;
348
349 IdTable::const_iterator decls = tables->idTable.find( id );
350 if ( decls != tables->idTable.end() ) {
351 const MangleTable &mangleTable = decls->second;
352 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
353 // check for C decls with the same name, skipping
354 // those with an incompatible type (by mangleName)
355 if ( ! LinkageSpec::isMangled( decl->second.id->get_linkage() ) && decl->first == mangleName ) return true;
356 }
357 }
358
359 return tables->base.hasCompatibleCDecl( id, mangleName, scope );
360 }
361
362 NamedTypeDecl *Indexer::lookupTypeAtScope( const std::string &id, unsigned long scope ) const {
363 if ( ! tables ) return 0;
364 if ( tables->scope < scope ) return 0;
365 if ( tables->scope > scope ) return tables->base.lookupTypeAtScope( id, scope );
366
367 TypeTable::const_iterator ret = tables->typeTable.find( id );
368 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupTypeAtScope( id, scope );
369 }
370
371 StructDecl *Indexer::lookupStructAtScope( const std::string &id, unsigned long scope ) const {
372 if ( ! tables ) return 0;
373 if ( tables->scope < scope ) return 0;
374 if ( tables->scope > scope ) return tables->base.lookupStructAtScope( id, scope );
375
376 StructTable::const_iterator ret = tables->structTable.find( id );
377 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStructAtScope( id, scope );
378 }
379
380 EnumDecl *Indexer::lookupEnumAtScope( const std::string &id, unsigned long scope ) const {
381 if ( ! tables ) return 0;
382 if ( tables->scope < scope ) return 0;
383 if ( tables->scope > scope ) return tables->base.lookupEnumAtScope( id, scope );
384
385 EnumTable::const_iterator ret = tables->enumTable.find( id );
386 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnumAtScope( id, scope );
387 }
388
389 UnionDecl *Indexer::lookupUnionAtScope( const std::string &id, unsigned long scope ) const {
390 if ( ! tables ) return 0;
391 if ( tables->scope < scope ) return 0;
392 if ( tables->scope > scope ) return tables->base.lookupUnionAtScope( id, scope );
393
394 UnionTable::const_iterator ret = tables->unionTable.find( id );
395 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnionAtScope( id, scope );
396 }
397
398 TraitDecl *Indexer::lookupTraitAtScope( const std::string &id, unsigned long scope ) const {
399 if ( ! tables ) return 0;
400 if ( tables->scope < scope ) return 0;
401 if ( tables->scope > scope ) return tables->base.lookupTraitAtScope( id, scope );
402
403 TraitTable::const_iterator ret = tables->traitTable.find( id );
404 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTraitAtScope( id, scope );
405 }
406
407 bool isFunction( DeclarationWithType * decl ) {
408 return GenPoly::getFunctionType( decl->get_type() );
409 }
410
411 bool isObject( DeclarationWithType * decl ) {
412 return ! isFunction( decl );
413 }
414
415 bool isDefinition( DeclarationWithType * decl ) {
416 if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) {
417 // a function is a definition if it has a body
418 return func->statements;
419 } else {
420 // an object is a definition if it is not marked extern.
421 // both objects must be marked extern
422 return ! decl->get_storageClasses().is_extern;
423 }
424 }
425
426 bool addedIdConflicts( Indexer::IdData & existing, DeclarationWithType *added, BaseSyntaxNode * deleteStmt, Indexer::ConflictFunction handleConflicts ) {
427 // if we're giving the same name mangling to things of different types then there is something wrong
428 assert( (isObject( added ) && isObject( existing.id ) )
429 || ( isFunction( added ) && isFunction( existing.id ) ) );
430
431 if ( LinkageSpec::isOverridable( existing.id->get_linkage() ) ) {
432 // new definition shadows the autogenerated one, even at the same scope
433 return false;
434 } else if ( LinkageSpec::isMangled( added->get_linkage() ) || ResolvExpr::typesCompatible( added->get_type(), existing.id->get_type(), Indexer() ) ) {
435
436 // it is a conflict if one declaration is deleted and the other is not
437 if ( deleteStmt && ! existing.deleteStmt ) {
438 return handleConflicts( existing, "deletion of defined identifier " );
439 } else if ( ! deleteStmt && existing.deleteStmt ) {
440 return handleConflicts( existing, "definition of deleted identifier " );
441 }
442
443 if ( isDefinition( added ) && isDefinition( existing.id ) ) {
444 if ( isFunction( added ) ) {
445 return handleConflicts( existing, "duplicate function definition for " );
446 } else {
447 return handleConflicts( existing, "duplicate object definition for " );
448 } // if
449 } // if
450 } else {
451 return handleConflicts( existing, "duplicate definition for " );
452 } // if
453
454 return true;
455 }
456
457 void Indexer::addId( DeclarationWithType *decl, ConflictFunction handleConflicts, Expression * baseExpr, BaseSyntaxNode * deleteStmt ) {
458 if ( decl->name == "" ) return;
459 debugPrint( "Adding Id " << decl->name << std::endl );
460 makeWritable();
461
462 const std::string &name = decl->name;
463 std::string mangleName;
464 if ( LinkageSpec::isOverridable( decl->linkage ) ) {
465 // mangle the name without including the appropriate suffix, so overridable routines are placed into the
466 // same "bucket" as their user defined versions.
467 mangleName = Mangler::mangle( decl, false );
468 } else {
469 mangleName = Mangler::mangle( decl );
470 } // if
471
472 // this ensures that no two declarations with the same unmangled name at the same scope both have C linkage
473 if ( ! LinkageSpec::isMangled( decl->linkage ) ) {
474 // NOTE this is broken in Richard's original code in such a way that it never triggers (it
475 // doesn't check decls that have the same manglename, and all C-linkage decls are defined to
476 // have their name as their manglename, hence the error can never trigger).
477 // The code here is closer to correct, but name mangling would have to be completely
478 // isomorphic to C type-compatibility, which it may not be.
479 if ( hasIncompatibleCDecl( name, mangleName, scope ) ) {
480 SemanticError( decl, "conflicting overload of C function " );
481 }
482 } else {
483 // Check that a Cforall declaration doesn't override any C declaration
484 if ( hasCompatibleCDecl( name, mangleName, scope ) ) {
485 SemanticError( decl, "Cforall declaration hides C function " );
486 }
487 }
488
489 // Skip repeat declarations of the same identifier
490 IdData * existing = lookupIdAtScope( name, mangleName, scope );
491 if ( existing && existing->id && addedIdConflicts( *existing, decl, deleteStmt, handleConflicts ) ) return;
492
493 // add to indexer
494 tables->idTable[ name ][ mangleName ] = IdData{ decl, baseExpr, deleteStmt };
495 ++tables->size;
496 }
497
498 void Indexer::addId( DeclarationWithType * decl, Expression * baseExpr ) {
499 // default handling of conflicts is to raise an error
500 addId( decl, [decl](IdData &, const std::string & msg) { SemanticError( decl, msg ); return true; }, baseExpr, decl->isDeleted ? decl : nullptr );
501 }
502
503 void Indexer::addDeletedId( DeclarationWithType * decl, BaseSyntaxNode * deleteStmt ) {
504 // default handling of conflicts is to raise an error
505 addId( decl, [decl](IdData &, const std::string & msg) { SemanticError( decl, msg ); return true; }, nullptr, deleteStmt );
506 }
507
508 bool addedTypeConflicts( NamedTypeDecl *existing, NamedTypeDecl *added ) {
509 if ( existing->base == nullptr ) {
510 return false;
511 } else if ( added->base == nullptr ) {
512 return true;
513 } else {
514 assert( existing->base && added->base );
515 // typedef redeclarations are errors only if types are different
516 if ( ! ResolvExpr::typesCompatible( existing->base, added->base, Indexer() ) ) {
517 SemanticError( added->location, "redeclaration of " + added->name );
518 }
519 }
520 // does not need to be added to the table if both existing and added have a base that are the same
521 return true;
522 }
523
524 void Indexer::addType( NamedTypeDecl *decl ) {
525 debugPrint( "Adding type " << decl->name << std::endl );
526 makeWritable();
527
528 const std::string &id = decl->name;
529 TypeTable::iterator existing = tables->typeTable.find( id );
530 if ( existing == tables->typeTable.end() ) {
531 NamedTypeDecl *parent = tables->base.lookupTypeAtScope( id, scope );
532 if ( ! parent || ! addedTypeConflicts( parent, decl ) ) {
533 tables->typeTable.insert( existing, std::make_pair( id, decl ) );
534 ++tables->size;
535 }
536 } else {
537 if ( ! addedTypeConflicts( existing->second, decl ) ) {
538 existing->second = decl;
539 }
540 }
541 }
542
543 bool addedDeclConflicts( AggregateDecl *existing, AggregateDecl *added ) {
544 if ( ! existing->body ) {
545 return false;
546 } else if ( added->body ) {
547 SemanticError( added, "redeclaration of " );
548 } // if
549 return true;
550 }
551
552 void Indexer::addStruct( const std::string &id ) {
553 debugPrint( "Adding fwd decl for struct " << id << std::endl );
554 addStruct( new StructDecl( id ) );
555 }
556
557 void Indexer::addStruct( StructDecl *decl ) {
558 debugPrint( "Adding struct " << decl->name << std::endl );
559 makeWritable();
560
561 const std::string &id = decl->name;
562 StructTable::iterator existing = tables->structTable.find( id );
563 if ( existing == tables->structTable.end() ) {
564 StructDecl *parent = tables->base.lookupStructAtScope( id, scope );
565 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
566 tables->structTable.insert( existing, std::make_pair( id, decl ) );
567 ++tables->size;
568 }
569 } else {
570 if ( ! addedDeclConflicts( existing->second, decl ) ) {
571 existing->second = decl;
572 }
573 }
574 }
575
576 void Indexer::addEnum( EnumDecl *decl ) {
577 debugPrint( "Adding enum " << decl->name << std::endl );
578 makeWritable();
579
580 const std::string &id = decl->name;
581 EnumTable::iterator existing = tables->enumTable.find( id );
582 if ( existing == tables->enumTable.end() ) {
583 EnumDecl *parent = tables->base.lookupEnumAtScope( id, scope );
584 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
585 tables->enumTable.insert( existing, std::make_pair( id, decl ) );
586 ++tables->size;
587 }
588 } else {
589 if ( ! addedDeclConflicts( existing->second, decl ) ) {
590 existing->second = decl;
591 }
592 }
593 }
594
595 void Indexer::addUnion( const std::string &id ) {
596 debugPrint( "Adding fwd decl for union " << id << std::endl );
597 addUnion( new UnionDecl( id ) );
598 }
599
600 void Indexer::addUnion( UnionDecl *decl ) {
601 debugPrint( "Adding union " << decl->name << std::endl );
602 makeWritable();
603
604 const std::string &id = decl->name;
605 UnionTable::iterator existing = tables->unionTable.find( id );
606 if ( existing == tables->unionTable.end() ) {
607 UnionDecl *parent = tables->base.lookupUnionAtScope( id, scope );
608 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
609 tables->unionTable.insert( existing, std::make_pair( id, decl ) );
610 ++tables->size;
611 }
612 } else {
613 if ( ! addedDeclConflicts( existing->second, decl ) ) {
614 existing->second = decl;
615 }
616 }
617 }
618
619 void Indexer::addTrait( TraitDecl *decl ) {
620 debugPrint( "Adding trait " << decl->name << std::endl );
621 makeWritable();
622
623 const std::string &id = decl->name;
624 TraitTable::iterator existing = tables->traitTable.find( id );
625 if ( existing == tables->traitTable.end() ) {
626 TraitDecl *parent = tables->base.lookupTraitAtScope( id, scope );
627 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
628 tables->traitTable.insert( existing, std::make_pair( id, decl ) );
629 ++tables->size;
630 }
631 } else {
632 if ( ! addedDeclConflicts( existing->second, decl ) ) {
633 existing->second = decl;
634 }
635 }
636 }
637
638 void Indexer::addMembers( AggregateDecl * aggr, Expression * expr, ConflictFunction handleConflicts ) {
639 for ( Declaration * decl : aggr->members ) {
640 if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
641 addId( dwt, handleConflicts, expr );
642 if ( dwt->name == "" ) {
643 Type * t = dwt->get_type()->stripReferences();
644 if ( dynamic_cast< StructInstType * >( t ) || dynamic_cast< UnionInstType * >( t ) ) {
645 Expression * base = expr->clone();
646 ResolvExpr::Cost cost = ResolvExpr::Cost::zero; // xxx - carry this cost into the indexer as a base cost?
647 ResolvExpr::referenceToRvalueConversion( base, cost );
648 addMembers( t->getAggr(), new MemberExpr( dwt, base ), handleConflicts );
649 }
650 }
651 }
652 }
653 }
654
655 void Indexer::addWith( std::list< Expression * > & withExprs, BaseSyntaxNode * withStmt ) {
656 for ( Expression * expr : withExprs ) {
657 if ( expr->result ) {
658 AggregateDecl * aggr = expr->result->stripReferences()->getAggr();
659 assertf( aggr, "WithStmt expr has non-aggregate type: %s", toString( expr->result ).c_str() );
660
661 addMembers( aggr, expr, [withStmt](IdData & existing, const std::string &) {
662 // on conflict, delete the identifier
663 existing.deleteStmt = withStmt;
664 return true;
665 });
666 }
667 }
668 }
669
670 void Indexer::addIds( const std::list< DeclarationWithType * > & decls ) {
671 for ( auto d : decls ) {
672 addId( d );
673 }
674 }
675
676 void Indexer::addTypes( const std::list< TypeDecl * > & tds ) {
677 for ( auto td : tds ) {
678 addType( td );
679 addIds( td->assertions );
680 }
681 }
682
683 void Indexer::addFunctionType( FunctionType * ftype ) {
684 addTypes( ftype->forall );
685 addIds( ftype->returnVals );
686 addIds( ftype->parameters );
687 }
688
689 void Indexer::enterScope() {
690 ++scope;
691
692 if ( doDebug ) {
693 std::cerr << "--- Entering scope " << scope << std::endl;
694 }
695 }
696
697 void Indexer::leaveScope() {
698 using std::cerr;
699
700 assert( scope > 0 && "cannot leave initial scope" );
701 if ( doDebug ) {
702 cerr << "--- Leaving scope " << scope << " containing" << std::endl;
703 }
704 --scope;
705
706 while ( tables && tables->scope > scope ) {
707 if ( doDebug ) {
708 dump( tables->idTable, cerr );
709 dump( tables->typeTable, cerr );
710 dump( tables->structTable, cerr );
711 dump( tables->enumTable, cerr );
712 dump( tables->unionTable, cerr );
713 dump( tables->traitTable, cerr );
714 }
715
716 // swap tables for base table until we find one at an appropriate scope
717 Indexer::Impl *base = newRef( tables->base.tables );
718 deleteRef( tables );
719 tables = base;
720 }
721 }
722
723 void Indexer::print( std::ostream &os, int indent ) const {
724 using std::cerr;
725
726 if ( tables ) {
727 os << "--- scope " << tables->scope << " ---" << std::endl;
728
729 os << "===idTable===" << std::endl;
730 dump( tables->idTable, os );
731 os << "===typeTable===" << std::endl;
732 dump( tables->typeTable, os );
733 os << "===structTable===" << std::endl;
734 dump( tables->structTable, os );
735 os << "===enumTable===" << std::endl;
736 dump( tables->enumTable, os );
737 os << "===unionTable===" << std::endl;
738 dump( tables->unionTable, os );
739 os << "===contextTable===" << std::endl;
740 dump( tables->traitTable, os );
741
742 tables->base.print( os, indent );
743 } else {
744 os << "--- end ---" << std::endl;
745 }
746
747 }
748
749 Expression * Indexer::IdData::combine( ResolvExpr::Cost & cost ) const {
750 Expression * ret = nullptr;
751 if ( baseExpr ) {
752 Expression * base = baseExpr->clone();
753 ResolvExpr::referenceToRvalueConversion( base, cost );
754 ret = new MemberExpr( id, base );
755 // xxx - this introduces hidden environments, for now remove them.
756 // std::swap( base->env, ret->env );
757 delete base->env;
758 base->env = nullptr;
759 } else {
760 ret = new VariableExpr( id );
761 }
762 if ( deleteStmt ) ret = new DeletedExpr( ret, deleteStmt );
763 return ret;
764 }
765} // namespace SymTab
766
767// Local Variables: //
768// tab-width: 4 //
769// mode: c++ //
770// compile-command: "make install" //
771// End: //
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