source: src/SymTab/Indexer.cc@ 9f652a1

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 new-env no_list persistent-indexer pthread-emulation qualifiedEnum with_gc
Last change on this file since 9f652a1 was a16764a6, checked in by Thierry Delisle <tdelisle@…>, 8 years ago

Changed warning system to prepare for toggling warnings
  • Property mode set to 100644
File size: 28.1 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 "InitTweak/InitTweak.h" // for isConstructor, isCopyFunction, isC...
29#include "Mangler.h" // for Mangler
30#include "Parser/LinkageSpec.h" // for isMangled, isOverridable, Spec
31#include "ResolvExpr/typeops.h" // for typesCompatible
32#include "SynTree/Constant.h" // for Constant
33#include "SynTree/Declaration.h" // for DeclarationWithType, FunctionDecl
34#include "SynTree/Expression.h" // for Expression, ImplicitCopyCtorExpr
35#include "SynTree/Initializer.h" // for Initializer
36#include "SynTree/Statement.h" // for CompoundStmt, Statement, ForStmt (...
37#include "SynTree/Type.h" // for Type, StructInstType, UnionInstType
38
39#define debugPrint(x) if ( doDebug ) { std::cerr << x; }
40
41namespace SymTab {
42 std::ostream & operator<<( std::ostream & out, const Indexer::IdData & data ) {
43 return out << "(" << data.id << "," << data.baseExpr << ")";
44 }
45
46 typedef std::unordered_map< std::string, Indexer::IdData > MangleTable;
47 typedef std::unordered_map< std::string, MangleTable > IdTable;
48 typedef std::unordered_map< std::string, NamedTypeDecl* > TypeTable;
49 typedef std::unordered_map< std::string, StructDecl* > StructTable;
50 typedef std::unordered_map< std::string, EnumDecl* > EnumTable;
51 typedef std::unordered_map< std::string, UnionDecl* > UnionTable;
52 typedef std::unordered_map< std::string, TraitDecl* > TraitTable;
53
54 void dump( const IdTable &table, std::ostream &os ) {
55 for ( IdTable::const_iterator id = table.begin(); id != table.end(); ++id ) {
56 for ( MangleTable::const_iterator mangle = id->second.begin(); mangle != id->second.end(); ++mangle ) {
57 os << mangle->second << std::endl;
58 }
59 }
60 }
61
62 template< typename Decl >
63 void dump( const std::unordered_map< std::string, Decl* > &table, std::ostream &os ) {
64 for ( typename std::unordered_map< std::string, Decl* >::const_iterator it = table.begin(); it != table.end(); ++it ) {
65 os << it->second << std::endl;
66 } // for
67 }
68
69 struct Indexer::Impl {
70 Impl( unsigned long _scope ) : refCount(1), scope( _scope ), size( 0 ), base(),
71 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
72 Impl( unsigned long _scope, Indexer &&_base ) : refCount(1), scope( _scope ), size( 0 ), base( _base ),
73 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
74 unsigned long refCount; ///< Number of references to these tables
75 unsigned long scope; ///< Scope these tables are associated with
76 unsigned long size; ///< Number of elements stored in this table
77 const Indexer base; ///< Base indexer this extends
78
79 IdTable idTable; ///< Identifier namespace
80 TypeTable typeTable; ///< Type namespace
81 StructTable structTable; ///< Struct namespace
82 EnumTable enumTable; ///< Enum namespace
83 UnionTable unionTable; ///< Union namespace
84 TraitTable traitTable; ///< Trait namespace
85 };
86
87 Indexer::Impl *Indexer::newRef( Indexer::Impl *toClone ) {
88 if ( ! toClone ) return 0;
89
90 // shorten the search chain by skipping empty links
91 Indexer::Impl *ret = toClone->size == 0 ? toClone->base.tables : toClone;
92 if ( ret ) { ++ret->refCount; }
93
94 return ret;
95 }
96
97 void Indexer::deleteRef( Indexer::Impl *toFree ) {
98 if ( ! toFree ) return;
99
100 if ( --toFree->refCount == 0 ) delete toFree;
101 }
102
103 void Indexer::removeSpecialOverrides( const std::string &id, std::list< IdData > & out ) const {
104 // only need to perform this step for constructors, destructors, and assignment functions
105 if ( ! CodeGen::isCtorDtorAssign( id ) ) return;
106
107 // helpful data structure
108 struct ValueType {
109 struct DeclBall {
110 IdData decl;
111 bool isUserDefinedFunc; // properties for this particular decl
112 bool isDefaultCtor;
113 bool isDtor;
114 bool isCopyFunc;
115 };
116 // properties for this type
117 bool existsUserDefinedFunc = false; // any user-defined function found
118 bool existsUserDefinedCtor = false; // any user-defined constructor found
119 bool existsUserDefinedDtor = false; // any user-defined destructor found
120 bool existsUserDefinedCopyFunc = false; // user-defined copy ctor found
121 bool existsUserDefinedDefaultCtor = false; // user-defined default ctor found
122 std::list< DeclBall > decls;
123
124 // another FunctionDecl for the current type was found - determine
125 // if it has special properties and update data structure accordingly
126 ValueType & operator+=( IdData data ) {
127 DeclarationWithType * function = data.id;
128 bool isUserDefinedFunc = ! LinkageSpec::isOverridable( function->get_linkage() );
129 bool isDefaultCtor = InitTweak::isDefaultConstructor( function );
130 bool isDtor = InitTweak::isDestructor( function );
131 bool isCopyFunc = InitTweak::isCopyFunction( function, function->get_name() );
132 decls.push_back( DeclBall{ data, isUserDefinedFunc, isDefaultCtor, isDtor, isCopyFunc } );
133 existsUserDefinedFunc = existsUserDefinedFunc || isUserDefinedFunc;
134 existsUserDefinedCtor = existsUserDefinedCtor || (isUserDefinedFunc && CodeGen::isConstructor( function->get_name() ) );
135 existsUserDefinedDtor = existsUserDefinedDtor || (isUserDefinedFunc && isDtor);
136 existsUserDefinedCopyFunc = existsUserDefinedCopyFunc || (isUserDefinedFunc && isCopyFunc);
137 existsUserDefinedDefaultCtor = existsUserDefinedDefaultCtor || (isUserDefinedFunc && isDefaultCtor);
138 return *this;
139 }
140 }; // ValueType
141
142 std::list< IdData > copy;
143 copy.splice( copy.end(), out );
144
145 // organize discovered declarations by type
146 std::unordered_map< std::string, ValueType > funcMap;
147 for ( auto decl : copy ) {
148 if ( FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl.id ) ) {
149 std::list< DeclarationWithType * > & params = function->get_functionType()->get_parameters();
150 assert( ! params.empty() );
151 // use base type of pointer, so that qualifiers on the pointer type aren't considered.
152 Type * base = InitTweak::getPointerBase( params.front()->get_type() );
153 assert( base );
154 funcMap[ Mangler::mangle( base ) ] += decl;
155 } else {
156 out.push_back( decl );
157 }
158 }
159
160 // if a type contains user defined ctor/dtor/assign, then special rules trigger, which determine
161 // the set of ctor/dtor/assign that are seen by the requester. In particular, if the user defines
162 // a default ctor, then the generated default ctor should never be seen, likewise for copy ctor
163 // and dtor. If the user defines any ctor/dtor, then no generated field ctors should be seen.
164 // If the user defines any ctor then the generated default ctor should not be seen (intrinsic default
165 // ctor must be overridden exactly).
166 for ( std::pair< const std::string, ValueType > & pair : funcMap ) {
167 ValueType & val = pair.second;
168 for ( ValueType::DeclBall ball : val.decls ) {
169 bool noUserDefinedFunc = ! val.existsUserDefinedFunc;
170 bool isUserDefinedFunc = ball.isUserDefinedFunc;
171 bool isAcceptableDefaultCtor = (! val.existsUserDefinedCtor || (! val.existsUserDefinedDefaultCtor && ball.decl.id->get_linkage() == LinkageSpec::Intrinsic)) && ball.isDefaultCtor; // allow default constructors only when no user-defined constructors exist, except in the case of intrinsics, which require exact overrides
172 bool isAcceptableCopyFunc = ! val.existsUserDefinedCopyFunc && ball.isCopyFunc; // handles copy ctor and assignment operator
173 bool isAcceptableDtor = ! val.existsUserDefinedDtor && ball.isDtor;
174 if ( noUserDefinedFunc || isUserDefinedFunc || isAcceptableDefaultCtor || isAcceptableCopyFunc || isAcceptableDtor ) {
175 // decl conforms to the rules described above, so it should be seen by the requester
176 out.push_back( ball.decl );
177 }
178 }
179 }
180 }
181
182 void Indexer::makeWritable() {
183 if ( ! tables ) {
184 // create indexer if not yet set
185 tables = new Indexer::Impl( scope );
186 } else if ( tables->refCount > 1 || tables->scope != scope ) {
187 // make this indexer the base of a fresh indexer at the current scope
188 tables = new Indexer::Impl( scope, std::move( *this ) );
189 }
190 }
191
192 Indexer::Indexer() : tables( 0 ), scope( 0 ) {}
193
194 Indexer::Indexer( const Indexer &that ) : doDebug( that.doDebug ), tables( newRef( that.tables ) ), scope( that.scope ) {}
195
196 Indexer::Indexer( Indexer &&that ) : doDebug( that.doDebug ), tables( that.tables ), scope( that.scope ) {
197 that.tables = 0;
198 }
199
200 Indexer::~Indexer() {
201 deleteRef( tables );
202 }
203
204 Indexer& Indexer::operator= ( const Indexer &that ) {
205 deleteRef( tables );
206
207 tables = newRef( that.tables );
208 scope = that.scope;
209 doDebug = that.doDebug;
210
211 return *this;
212 }
213
214 Indexer& Indexer::operator= ( Indexer &&that ) {
215 deleteRef( tables );
216
217 tables = that.tables;
218 scope = that.scope;
219 doDebug = that.doDebug;
220
221 that.tables = 0;
222
223 return *this;
224 }
225
226 void Indexer::lookupId( const std::string &id, std::list< IdData > &out ) const {
227 std::unordered_set< std::string > foundMangleNames;
228
229 Indexer::Impl *searchTables = tables;
230 while ( searchTables ) {
231
232 IdTable::const_iterator decls = searchTables->idTable.find( id );
233 if ( decls != searchTables->idTable.end() ) {
234 const MangleTable &mangleTable = decls->second;
235 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
236 // mark the mangled name as found, skipping this insertion if a declaration for that name has already been found
237 if ( foundMangleNames.insert( decl->first ).second == false ) continue;
238
239 out.push_back( decl->second );
240 }
241 }
242
243 // get declarations from base indexers
244 searchTables = searchTables->base.tables;
245 }
246
247 // some special functions, e.g. constructors and destructors
248 // remove autogenerated functions when they are defined so that
249 // they can never be matched
250 removeSpecialOverrides( id, out );
251 }
252
253 NamedTypeDecl *Indexer::lookupType( const std::string &id ) const {
254 if ( ! tables ) return 0;
255
256 TypeTable::const_iterator ret = tables->typeTable.find( id );
257 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupType( id );
258 }
259
260 StructDecl *Indexer::lookupStruct( const std::string &id ) const {
261 if ( ! tables ) return 0;
262
263 StructTable::const_iterator ret = tables->structTable.find( id );
264 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStruct( id );
265 }
266
267 EnumDecl *Indexer::lookupEnum( const std::string &id ) const {
268 if ( ! tables ) return 0;
269
270 EnumTable::const_iterator ret = tables->enumTable.find( id );
271 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnum( id );
272 }
273
274 UnionDecl *Indexer::lookupUnion( const std::string &id ) const {
275 if ( ! tables ) return 0;
276
277 UnionTable::const_iterator ret = tables->unionTable.find( id );
278 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnion( id );
279 }
280
281 TraitDecl *Indexer::lookupTrait( const std::string &id ) const {
282 if ( ! tables ) return 0;
283
284 TraitTable::const_iterator ret = tables->traitTable.find( id );
285 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTrait( id );
286 }
287
288 const Indexer::IdData * Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
289 if ( ! tables ) return nullptr;
290 if ( tables->scope < scope ) return nullptr;
291
292 IdTable::const_iterator decls = tables->idTable.find( id );
293 if ( decls != tables->idTable.end() ) {
294 const MangleTable &mangleTable = decls->second;
295 MangleTable::const_iterator decl = mangleTable.find( mangleName );
296 if ( decl != mangleTable.end() ) return &decl->second;
297 }
298
299 return tables->base.lookupIdAtScope( id, mangleName, scope );
300 }
301
302 Indexer::IdData * Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) {
303 return const_cast<IdData *>(const_cast<const Indexer *>(this)->lookupIdAtScope( id, mangleName, scope ));
304 }
305
306 bool Indexer::hasIncompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
307 if ( ! tables ) return false;
308 if ( tables->scope < scope ) return false;
309
310 IdTable::const_iterator decls = tables->idTable.find( id );
311 if ( decls != tables->idTable.end() ) {
312 const MangleTable &mangleTable = decls->second;
313 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
314 // check for C decls with the same name, skipping those with a compatible type (by mangleName)
315 if ( ! LinkageSpec::isMangled( decl->second.id->get_linkage() ) && decl->first != mangleName ) return true;
316 }
317 }
318
319 return tables->base.hasIncompatibleCDecl( id, mangleName, scope );
320 }
321
322 bool Indexer::hasCompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
323 if ( ! tables ) return false;
324 if ( tables->scope < scope ) return false;
325
326 IdTable::const_iterator decls = tables->idTable.find( id );
327 if ( decls != tables->idTable.end() ) {
328 const MangleTable &mangleTable = decls->second;
329 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
330 // check for C decls with the same name, skipping
331 // those with an incompatible type (by mangleName)
332 if ( ! LinkageSpec::isMangled( decl->second.id->get_linkage() ) && decl->first == mangleName ) return true;
333 }
334 }
335
336 return tables->base.hasCompatibleCDecl( id, mangleName, scope );
337 }
338
339 NamedTypeDecl *Indexer::lookupTypeAtScope( const std::string &id, unsigned long scope ) const {
340 if ( ! tables ) return 0;
341 if ( tables->scope < scope ) return 0;
342
343 TypeTable::const_iterator ret = tables->typeTable.find( id );
344 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupTypeAtScope( id, scope );
345 }
346
347 StructDecl *Indexer::lookupStructAtScope( const std::string &id, unsigned long scope ) const {
348 if ( ! tables ) return 0;
349 if ( tables->scope < scope ) return 0;
350
351 StructTable::const_iterator ret = tables->structTable.find( id );
352 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStructAtScope( id, scope );
353 }
354
355 EnumDecl *Indexer::lookupEnumAtScope( const std::string &id, unsigned long scope ) const {
356 if ( ! tables ) return 0;
357 if ( tables->scope < scope ) return 0;
358
359 EnumTable::const_iterator ret = tables->enumTable.find( id );
360 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnumAtScope( id, scope );
361 }
362
363 UnionDecl *Indexer::lookupUnionAtScope( const std::string &id, unsigned long scope ) const {
364 if ( ! tables ) return 0;
365 if ( tables->scope < scope ) return 0;
366
367 UnionTable::const_iterator ret = tables->unionTable.find( id );
368 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnionAtScope( id, scope );
369 }
370
371 TraitDecl *Indexer::lookupTraitAtScope( const std::string &id, unsigned long scope ) const {
372 if ( ! tables ) return 0;
373 if ( tables->scope < scope ) return 0;
374
375 TraitTable::const_iterator ret = tables->traitTable.find( id );
376 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTraitAtScope( id, scope );
377 }
378
379 bool addedIdConflicts( Indexer::IdData & existing, DeclarationWithType *added, BaseSyntaxNode * deleteStmt, Indexer::ConflictFunction handleConflicts ) {
380 // if we're giving the same name mangling to things of different types then there is something wrong
381 assert( (dynamic_cast<ObjectDecl*>( added ) && dynamic_cast<ObjectDecl*>( existing.id ) )
382 || (dynamic_cast<FunctionDecl*>( added ) && dynamic_cast<FunctionDecl*>( existing.id ) ) );
383
384 if ( LinkageSpec::isOverridable( existing.id->get_linkage() ) ) {
385 // new definition shadows the autogenerated one, even at the same scope
386 return false;
387 } else if ( LinkageSpec::isMangled( added->get_linkage() ) || ResolvExpr::typesCompatible( added->get_type(), existing.id->get_type(), Indexer() ) ) {
388
389 // it is a conflict if one declaration is deleted and the other is not
390 if ( deleteStmt && ! existing.deleteStmt ) {
391 return handleConflicts( existing, "deletion of defined identifier " );
392 } else if ( ! deleteStmt && existing.deleteStmt ) {
393 return handleConflicts( existing, "definition of deleted identifier " );
394 }
395
396 // typesCompatible doesn't really do the right thing here. When checking compatibility of function types,
397 // we should ignore outermost pointer qualifiers, except _Atomic?
398 FunctionDecl * newentry = dynamic_cast< FunctionDecl * >( added );
399 FunctionDecl * oldentry = dynamic_cast< FunctionDecl * >( existing.id );
400 if ( newentry && oldentry ) {
401 if ( newentry->get_statements() && oldentry->get_statements() ) {
402 return handleConflicts( existing, "duplicate function definition for " );
403 } // if
404 } else {
405 // two objects with the same mangled name defined in the same scope.
406 // both objects must be marked extern or both must be intrinsic for this to be okay
407 // xxx - perhaps it's actually if either is intrinsic then this is okay?
408 // might also need to be same storage class?
409 ObjectDecl * newobj = dynamic_cast< ObjectDecl * >( added );
410 ObjectDecl * oldobj = dynamic_cast< ObjectDecl * >( existing.id );
411 if ( ! newobj->get_storageClasses().is_extern && ! oldobj->get_storageClasses().is_extern ) {
412 return handleConflicts( existing, "duplicate object definition for " );
413 } // if
414 } // if
415 } else {
416 return handleConflicts( existing, "duplicate definition for " );
417 } // if
418
419 return true;
420 }
421
422 void Indexer::addId( DeclarationWithType *decl, ConflictFunction handleConflicts, Expression * baseExpr, BaseSyntaxNode * deleteStmt ) {
423 if ( decl->name == "" ) return;
424 debugPrint( "Adding Id " << decl->name << std::endl );
425 makeWritable();
426
427 const std::string &name = decl->name;
428 std::string mangleName;
429 if ( LinkageSpec::isOverridable( decl->linkage ) ) {
430 // mangle the name without including the appropriate suffix, so overridable routines are placed into the
431 // same "bucket" as their user defined versions.
432 mangleName = Mangler::mangle( decl, false );
433 } else {
434 mangleName = Mangler::mangle( decl );
435 } // if
436
437 // this ensures that no two declarations with the same unmangled name at the same scope both have C linkage
438 if ( ! LinkageSpec::isMangled( decl->linkage ) ) {
439 // NOTE this is broken in Richard's original code in such a way that it never triggers (it
440 // doesn't check decls that have the same manglename, and all C-linkage decls are defined to
441 // have their name as their manglename, hence the error can never trigger).
442 // The code here is closer to correct, but name mangling would have to be completely
443 // isomorphic to C type-compatibility, which it may not be.
444 if ( hasIncompatibleCDecl( name, mangleName, scope ) ) {
445 SemanticError( decl, "conflicting overload of C function " );
446 }
447 } else {
448 // Check that a Cforall declaration doesn't override any C declaration
449 if ( hasCompatibleCDecl( name, mangleName, scope ) ) {
450 SemanticError( decl, "Cforall declaration hides C function " );
451 }
452 }
453
454 // Skip repeat declarations of the same identifier
455 IdData * existing = lookupIdAtScope( name, mangleName, scope );
456 if ( existing && existing->id && addedIdConflicts( *existing, decl, deleteStmt, handleConflicts ) ) return;
457
458 // add to indexer
459 tables->idTable[ name ][ mangleName ] = IdData{ decl, baseExpr, deleteStmt };
460 ++tables->size;
461 }
462
463 void Indexer::addId( DeclarationWithType * decl, Expression * baseExpr ) {
464 // default handling of conflicts is to raise an error
465 addId( decl, [decl](IdData &, const std::string & msg) { SemanticError( decl, msg ); return true; }, baseExpr );
466 }
467
468 void Indexer::addDeletedId( DeclarationWithType * decl, BaseSyntaxNode * deleteStmt ) {
469 // default handling of conflicts is to raise an error
470 addId( decl, [decl](IdData &, const std::string & msg) { SemanticError( decl, msg ); return true; }, nullptr, deleteStmt );
471 }
472
473 bool addedTypeConflicts( NamedTypeDecl *existing, NamedTypeDecl *added ) {
474 if ( existing->get_base() == 0 ) {
475 return false;
476 } else if ( added->get_base() == 0 ) {
477 return true;
478 } else {
479 SemanticError( added, "redeclaration of " );
480 }
481 }
482
483 void Indexer::addType( NamedTypeDecl *decl ) {
484 debugPrint( "Adding type " << decl->name << std::endl );
485 makeWritable();
486
487 const std::string &id = decl->get_name();
488 TypeTable::iterator existing = tables->typeTable.find( id );
489 if ( existing == tables->typeTable.end() ) {
490 NamedTypeDecl *parent = tables->base.lookupTypeAtScope( id, scope );
491 if ( ! parent || ! addedTypeConflicts( parent, decl ) ) {
492 tables->typeTable.insert( existing, std::make_pair( id, decl ) );
493 ++tables->size;
494 }
495 } else {
496 if ( ! addedTypeConflicts( existing->second, decl ) ) {
497 existing->second = decl;
498 }
499 }
500 }
501
502 bool addedDeclConflicts( AggregateDecl *existing, AggregateDecl *added ) {
503 if ( existing->get_members().empty() ) {
504 return false;
505 } else if ( ! added->get_members().empty() ) {
506 SemanticError( added, "redeclaration of " );
507 } // if
508 return true;
509 }
510
511 void Indexer::addStruct( const std::string &id ) {
512 debugPrint( "Adding fwd decl for struct " << id << std::endl );
513 addStruct( new StructDecl( id ) );
514 }
515
516 void Indexer::addStruct( StructDecl *decl ) {
517 debugPrint( "Adding struct " << decl->name << std::endl );
518 makeWritable();
519
520 const std::string &id = decl->get_name();
521 StructTable::iterator existing = tables->structTable.find( id );
522 if ( existing == tables->structTable.end() ) {
523 StructDecl *parent = tables->base.lookupStructAtScope( id, scope );
524 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
525 tables->structTable.insert( existing, std::make_pair( id, decl ) );
526 ++tables->size;
527 }
528 } else {
529 if ( ! addedDeclConflicts( existing->second, decl ) ) {
530 existing->second = decl;
531 }
532 }
533 }
534
535 void Indexer::addEnum( EnumDecl *decl ) {
536 debugPrint( "Adding enum " << decl->name << std::endl );
537 makeWritable();
538
539 const std::string &id = decl->get_name();
540 EnumTable::iterator existing = tables->enumTable.find( id );
541 if ( existing == tables->enumTable.end() ) {
542 EnumDecl *parent = tables->base.lookupEnumAtScope( id, scope );
543 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
544 tables->enumTable.insert( existing, std::make_pair( id, decl ) );
545 ++tables->size;
546 }
547 } else {
548 if ( ! addedDeclConflicts( existing->second, decl ) ) {
549 existing->second = decl;
550 }
551 }
552 }
553
554 void Indexer::addUnion( const std::string &id ) {
555 debugPrint( "Adding fwd decl for union " << id << std::endl );
556 addUnion( new UnionDecl( id ) );
557 }
558
559 void Indexer::addUnion( UnionDecl *decl ) {
560 debugPrint( "Adding union " << decl->name << std::endl );
561 makeWritable();
562
563 const std::string &id = decl->get_name();
564 UnionTable::iterator existing = tables->unionTable.find( id );
565 if ( existing == tables->unionTable.end() ) {
566 UnionDecl *parent = tables->base.lookupUnionAtScope( id, scope );
567 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
568 tables->unionTable.insert( existing, std::make_pair( id, decl ) );
569 ++tables->size;
570 }
571 } else {
572 if ( ! addedDeclConflicts( existing->second, decl ) ) {
573 existing->second = decl;
574 }
575 }
576 }
577
578 void Indexer::addTrait( TraitDecl *decl ) {
579 debugPrint( "Adding trait " << decl->name << std::endl );
580 makeWritable();
581
582 const std::string &id = decl->get_name();
583 TraitTable::iterator existing = tables->traitTable.find( id );
584 if ( existing == tables->traitTable.end() ) {
585 TraitDecl *parent = tables->base.lookupTraitAtScope( id, scope );
586 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
587 tables->traitTable.insert( existing, std::make_pair( id, decl ) );
588 ++tables->size;
589 }
590 } else {
591 if ( ! addedDeclConflicts( existing->second, decl ) ) {
592 existing->second = decl;
593 }
594 }
595 }
596
597 void Indexer::addMembers( AggregateDecl * aggr, Expression * expr, ConflictFunction handleConflicts ) {
598 for ( Declaration * decl : aggr->members ) {
599 if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
600 addId( dwt, handleConflicts, expr );
601 if ( dwt->name == "" ) {
602 Type * t = dwt->get_type()->stripReferences();
603 if ( dynamic_cast< StructInstType * >( t ) || dynamic_cast< UnionInstType * >( t ) ) {
604 Expression * base = expr->clone();
605 ResolvExpr::Cost cost = ResolvExpr::Cost::zero; // xxx - carry this cost into the indexer as a base cost?
606 ResolvExpr::referenceToRvalueConversion( base, cost );
607 addMembers( t->getAggr(), new MemberExpr( dwt, base ), handleConflicts );
608 }
609 }
610 }
611 }
612 }
613
614 void Indexer::addWith( std::list< Expression * > & withExprs, BaseSyntaxNode * withStmt ) {
615 for ( Expression * expr : withExprs ) {
616 if ( expr->result ) {
617 AggregateDecl * aggr = expr->result->stripReferences()->getAggr();
618 assertf( aggr, "WithStmt expr has non-aggregate type: %s", toString( expr->result ).c_str() );
619
620 addMembers( aggr, expr, [withStmt](IdData & existing, const std::string &) {
621 // on conflict, delete the identifier
622 existing.deleteStmt = withStmt;
623 return true;
624 });
625 }
626 }
627 }
628
629 void Indexer::addIds( const std::list< DeclarationWithType * > & decls ) {
630 for ( auto d : decls ) {
631 addId( d );
632 }
633 }
634
635 void Indexer::addTypes( const std::list< TypeDecl * > & tds ) {
636 for ( auto td : tds ) {
637 addType( td );
638 addIds( td->assertions );
639 }
640 }
641
642 void Indexer::addFunctionType( FunctionType * ftype ) {
643 addTypes( ftype->forall );
644 addIds( ftype->returnVals );
645 addIds( ftype->parameters );
646 }
647
648 void Indexer::enterScope() {
649 ++scope;
650
651 if ( doDebug ) {
652 std::cerr << "--- Entering scope " << scope << std::endl;
653 }
654 }
655
656 void Indexer::leaveScope() {
657 using std::cerr;
658
659 assert( scope > 0 && "cannot leave initial scope" );
660 if ( doDebug ) {
661 cerr << "--- Leaving scope " << scope << " containing" << std::endl;
662 }
663 --scope;
664
665 while ( tables && tables->scope > scope ) {
666 if ( doDebug ) {
667 dump( tables->idTable, cerr );
668 dump( tables->typeTable, cerr );
669 dump( tables->structTable, cerr );
670 dump( tables->enumTable, cerr );
671 dump( tables->unionTable, cerr );
672 dump( tables->traitTable, cerr );
673 }
674
675 // swap tables for base table until we find one at an appropriate scope
676 Indexer::Impl *base = newRef( tables->base.tables );
677 deleteRef( tables );
678 tables = base;
679 }
680 }
681
682 void Indexer::print( std::ostream &os, int indent ) const {
683 using std::cerr;
684
685 if ( tables ) {
686 os << "--- scope " << tables->scope << " ---" << std::endl;
687
688 os << "===idTable===" << std::endl;
689 dump( tables->idTable, os );
690 os << "===typeTable===" << std::endl;
691 dump( tables->typeTable, os );
692 os << "===structTable===" << std::endl;
693 dump( tables->structTable, os );
694 os << "===enumTable===" << std::endl;
695 dump( tables->enumTable, os );
696 os << "===unionTable===" << std::endl;
697 dump( tables->unionTable, os );
698 os << "===contextTable===" << std::endl;
699 dump( tables->traitTable, os );
700
701 tables->base.print( os, indent );
702 } else {
703 os << "--- end ---" << std::endl;
704 }
705
706 }
707
708 Expression * Indexer::IdData::combine( ResolvExpr::Cost & cost ) const {
709 Expression * ret = nullptr;
710 if ( baseExpr ) {
711 Expression * base = baseExpr->clone();
712 ResolvExpr::referenceToRvalueConversion( base, cost );
713 ret = new MemberExpr( id, base );
714 // xxx - this introduces hidden environments, for now remove them.
715 // std::swap( base->env, ret->env );
716 delete base->env;
717 base->env = nullptr;
718 } else {
719 ret = new VariableExpr( id );
720 }
721 if ( deleteStmt ) ret = new DeletedExpr( ret, deleteStmt );
722 return ret;
723 }
724} // namespace SymTab
725
726// Local Variables: //
727// tab-width: 4 //
728// mode: c++ //
729// compile-command: "make install" //
730// End: //
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