source: src/SymTab/Indexer.cc@ f5478c8

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 resolv-new with_gc
Last change on this file since f5478c8 was 5fe35d6, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Move addIds and addTypes to Indexer
  • Property mode set to 100644
File size: 24.8 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 typedef std::unordered_map< std::string, DeclarationWithType* > MangleTable;
43 typedef std::unordered_map< std::string, MangleTable > IdTable;
44 typedef std::unordered_map< std::string, NamedTypeDecl* > TypeTable;
45 typedef std::unordered_map< std::string, StructDecl* > StructTable;
46 typedef std::unordered_map< std::string, EnumDecl* > EnumTable;
47 typedef std::unordered_map< std::string, UnionDecl* > UnionTable;
48 typedef std::unordered_map< std::string, TraitDecl* > TraitTable;
49
50 void dump( const IdTable &table, std::ostream &os ) {
51 for ( IdTable::const_iterator id = table.begin(); id != table.end(); ++id ) {
52 for ( MangleTable::const_iterator mangle = id->second.begin(); mangle != id->second.end(); ++mangle ) {
53 os << mangle->second << std::endl;
54 }
55 }
56 }
57
58 template< typename Decl >
59 void dump( const std::unordered_map< std::string, Decl* > &table, std::ostream &os ) {
60 for ( typename std::unordered_map< std::string, Decl* >::const_iterator it = table.begin(); it != table.end(); ++it ) {
61 os << it->second << std::endl;
62 } // for
63 }
64
65 struct Indexer::Impl {
66 Impl( unsigned long _scope ) : refCount(1), scope( _scope ), size( 0 ), base(),
67 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
68 Impl( unsigned long _scope, Indexer &&_base ) : refCount(1), scope( _scope ), size( 0 ), base( _base ),
69 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
70 unsigned long refCount; ///< Number of references to these tables
71 unsigned long scope; ///< Scope these tables are associated with
72 unsigned long size; ///< Number of elements stored in this table
73 const Indexer base; ///< Base indexer this extends
74
75 IdTable idTable; ///< Identifier namespace
76 TypeTable typeTable; ///< Type namespace
77 StructTable structTable; ///< Struct namespace
78 EnumTable enumTable; ///< Enum namespace
79 UnionTable unionTable; ///< Union namespace
80 TraitTable traitTable; ///< Trait namespace
81 };
82
83 Indexer::Impl *Indexer::newRef( Indexer::Impl *toClone ) {
84 if ( ! toClone ) return 0;
85
86 // shorten the search chain by skipping empty links
87 Indexer::Impl *ret = toClone->size == 0 ? toClone->base.tables : toClone;
88 if ( ret ) { ++ret->refCount; }
89
90 return ret;
91 }
92
93 void Indexer::deleteRef( Indexer::Impl *toFree ) {
94 if ( ! toFree ) return;
95
96 if ( --toFree->refCount == 0 ) delete toFree;
97 }
98
99 void Indexer::removeSpecialOverrides( const std::string &id, std::list< DeclarationWithType * > & out ) const {
100 // only need to perform this step for constructors, destructors, and assignment functions
101 if ( ! CodeGen::isCtorDtorAssign( id ) ) return;
102
103 // helpful data structure
104 struct ValueType {
105 struct DeclBall {
106 FunctionDecl * decl;
107 bool isUserDefinedFunc; // properties for this particular decl
108 bool isDefaultCtor;
109 bool isDtor;
110 bool isCopyFunc;
111 };
112 // properties for this type
113 bool existsUserDefinedFunc = false; // any user-defined function found
114 bool existsUserDefinedCtor = false; // any user-defined constructor found
115 bool existsUserDefinedDtor = false; // any user-defined destructor found
116 bool existsUserDefinedCopyFunc = false; // user-defined copy ctor found
117 bool existsUserDefinedDefaultCtor = false; // user-defined default ctor 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+=( FunctionDecl * function ) {
123 bool isUserDefinedFunc = ! LinkageSpec::isOverridable( function->get_linkage() );
124 bool isDefaultCtor = InitTweak::isDefaultConstructor( function );
125 bool isDtor = InitTweak::isDestructor( function );
126 bool isCopyFunc = InitTweak::isCopyFunction( function, function->get_name() );
127 decls.push_back( DeclBall{ function, isUserDefinedFunc, isDefaultCtor, isDtor, isCopyFunc } );
128 existsUserDefinedFunc = existsUserDefinedFunc || isUserDefinedFunc;
129 existsUserDefinedCtor = existsUserDefinedCtor || (isUserDefinedFunc && CodeGen::isConstructor( function->get_name() ) );
130 existsUserDefinedDtor = existsUserDefinedDtor || (isUserDefinedFunc && isDtor);
131 existsUserDefinedCopyFunc = existsUserDefinedCopyFunc || (isUserDefinedFunc && isCopyFunc);
132 existsUserDefinedDefaultCtor = existsUserDefinedDefaultCtor || (isUserDefinedFunc && isDefaultCtor);
133 return *this;
134 }
135 }; // ValueType
136
137 std::list< DeclarationWithType * > copy;
138 copy.splice( copy.end(), out );
139
140 // organize discovered declarations by type
141 std::unordered_map< std::string, ValueType > funcMap;
142 for ( DeclarationWithType * decl : copy ) {
143 if ( FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl ) ) {
144 std::list< DeclarationWithType * > & params = function->get_functionType()->get_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 ) ] += function;
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 are seen by the requester. In particular, if the user defines
157 // a default ctor, then the generated default ctor should never be seen, likewise for copy ctor
158 // and dtor. If the user defines any ctor/dtor, then no generated field ctors should be seen.
159 // If the user defines any ctor then the generated default ctor should not be seen (intrinsic default
160 // ctor must be overridden exactly).
161 for ( std::pair< const std::string, ValueType > & pair : funcMap ) {
162 ValueType & val = pair.second;
163 for ( ValueType::DeclBall ball : val.decls ) {
164 bool noUserDefinedFunc = ! val.existsUserDefinedFunc;
165 bool isUserDefinedFunc = ball.isUserDefinedFunc;
166 bool isAcceptableDefaultCtor = (! val.existsUserDefinedCtor || (! val.existsUserDefinedDefaultCtor && ball.decl->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
167 bool isAcceptableCopyFunc = ! val.existsUserDefinedCopyFunc && ball.isCopyFunc; // handles copy ctor and assignment operator
168 bool isAcceptableDtor = ! val.existsUserDefinedDtor && ball.isDtor;
169 if ( noUserDefinedFunc || isUserDefinedFunc || isAcceptableDefaultCtor || isAcceptableCopyFunc || isAcceptableDtor ) {
170 // decl conforms to the rules described above, so it should be seen by the requester
171 out.push_back( ball.decl );
172 }
173 }
174 }
175 }
176
177 void Indexer::makeWritable() {
178 if ( ! tables ) {
179 // create indexer if not yet set
180 tables = new Indexer::Impl( scope );
181 } else if ( tables->refCount > 1 || tables->scope != scope ) {
182 // make this indexer the base of a fresh indexer at the current scope
183 tables = new Indexer::Impl( scope, std::move( *this ) );
184 }
185 }
186
187 Indexer::Indexer() : tables( 0 ), scope( 0 ) {}
188
189 Indexer::Indexer( const Indexer &that ) : doDebug( that.doDebug ), tables( newRef( that.tables ) ), scope( that.scope ) {}
190
191 Indexer::Indexer( Indexer &&that ) : doDebug( that.doDebug ), tables( that.tables ), scope( that.scope ) {
192 that.tables = 0;
193 }
194
195 Indexer::~Indexer() {
196 deleteRef( tables );
197 }
198
199 Indexer& Indexer::operator= ( const Indexer &that ) {
200 deleteRef( tables );
201
202 tables = newRef( that.tables );
203 scope = that.scope;
204 doDebug = that.doDebug;
205
206 return *this;
207 }
208
209 Indexer& Indexer::operator= ( Indexer &&that ) {
210 deleteRef( tables );
211
212 tables = that.tables;
213 scope = that.scope;
214 doDebug = that.doDebug;
215
216 that.tables = 0;
217
218 return *this;
219 }
220
221 void Indexer::lookupId( const std::string &id, std::list< DeclarationWithType* > &out ) const {
222 std::unordered_set< std::string > foundMangleNames;
223
224 Indexer::Impl *searchTables = tables;
225 while ( searchTables ) {
226
227 IdTable::const_iterator decls = searchTables->idTable.find( id );
228 if ( decls != searchTables->idTable.end() ) {
229 const MangleTable &mangleTable = decls->second;
230 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
231 // mark the mangled name as found, skipping this insertion if a declaration for that name has already been found
232 if ( foundMangleNames.insert( decl->first ).second == false ) continue;
233
234 out.push_back( decl->second );
235 }
236 }
237
238 // get declarations from base indexers
239 searchTables = searchTables->base.tables;
240 }
241
242 // some special functions, e.g. constructors and destructors
243 // remove autogenerated functions when they are defined so that
244 // they can never be matched
245 removeSpecialOverrides( id, out );
246 }
247
248 NamedTypeDecl *Indexer::lookupType( const std::string &id ) const {
249 if ( ! tables ) return 0;
250
251 TypeTable::const_iterator ret = tables->typeTable.find( id );
252 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupType( id );
253 }
254
255 StructDecl *Indexer::lookupStruct( const std::string &id ) const {
256 if ( ! tables ) return 0;
257
258 StructTable::const_iterator ret = tables->structTable.find( id );
259 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStruct( id );
260 }
261
262 EnumDecl *Indexer::lookupEnum( const std::string &id ) const {
263 if ( ! tables ) return 0;
264
265 EnumTable::const_iterator ret = tables->enumTable.find( id );
266 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnum( id );
267 }
268
269 UnionDecl *Indexer::lookupUnion( const std::string &id ) const {
270 if ( ! tables ) return 0;
271
272 UnionTable::const_iterator ret = tables->unionTable.find( id );
273 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnion( id );
274 }
275
276 TraitDecl *Indexer::lookupTrait( const std::string &id ) const {
277 if ( ! tables ) return 0;
278
279 TraitTable::const_iterator ret = tables->traitTable.find( id );
280 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTrait( id );
281 }
282
283 DeclarationWithType *Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
284 if ( ! tables ) return 0;
285 if ( tables->scope < scope ) return 0;
286
287 IdTable::const_iterator decls = tables->idTable.find( id );
288 if ( decls != tables->idTable.end() ) {
289 const MangleTable &mangleTable = decls->second;
290 MangleTable::const_iterator decl = mangleTable.find( mangleName );
291 if ( decl != mangleTable.end() ) return decl->second;
292 }
293
294 return tables->base.lookupIdAtScope( id, mangleName, scope );
295 }
296
297 bool Indexer::hasIncompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
298 if ( ! tables ) return false;
299 if ( tables->scope < scope ) return false;
300
301 IdTable::const_iterator decls = tables->idTable.find( id );
302 if ( decls != tables->idTable.end() ) {
303 const MangleTable &mangleTable = decls->second;
304 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
305 // check for C decls with the same name, skipping those with a compatible type (by mangleName)
306 if ( ! LinkageSpec::isMangled( decl->second->get_linkage() ) && decl->first != mangleName ) return true;
307 }
308 }
309
310 return tables->base.hasIncompatibleCDecl( id, mangleName, scope );
311 }
312
313 bool Indexer::hasCompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
314 if ( ! tables ) return false;
315 if ( tables->scope < scope ) return false;
316
317 IdTable::const_iterator decls = tables->idTable.find( id );
318 if ( decls != tables->idTable.end() ) {
319 const MangleTable &mangleTable = decls->second;
320 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
321 // check for C decls with the same name, skipping
322 // those with an incompatible type (by mangleName)
323 if ( ! LinkageSpec::isMangled( decl->second->get_linkage() ) && decl->first == mangleName ) return true;
324 }
325 }
326
327 return tables->base.hasCompatibleCDecl( id, mangleName, scope );
328 }
329
330 NamedTypeDecl *Indexer::lookupTypeAtScope( const std::string &id, unsigned long scope ) const {
331 if ( ! tables ) return 0;
332 if ( tables->scope < scope ) return 0;
333
334 TypeTable::const_iterator ret = tables->typeTable.find( id );
335 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupTypeAtScope( id, scope );
336 }
337
338 StructDecl *Indexer::lookupStructAtScope( const std::string &id, unsigned long scope ) const {
339 if ( ! tables ) return 0;
340 if ( tables->scope < scope ) return 0;
341
342 StructTable::const_iterator ret = tables->structTable.find( id );
343 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStructAtScope( id, scope );
344 }
345
346 EnumDecl *Indexer::lookupEnumAtScope( const std::string &id, unsigned long scope ) const {
347 if ( ! tables ) return 0;
348 if ( tables->scope < scope ) return 0;
349
350 EnumTable::const_iterator ret = tables->enumTable.find( id );
351 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnumAtScope( id, scope );
352 }
353
354 UnionDecl *Indexer::lookupUnionAtScope( const std::string &id, unsigned long scope ) const {
355 if ( ! tables ) return 0;
356 if ( tables->scope < scope ) return 0;
357
358 UnionTable::const_iterator ret = tables->unionTable.find( id );
359 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnionAtScope( id, scope );
360 }
361
362 TraitDecl *Indexer::lookupTraitAtScope( const std::string &id, unsigned long scope ) const {
363 if ( ! tables ) return 0;
364 if ( tables->scope < scope ) return 0;
365
366 TraitTable::const_iterator ret = tables->traitTable.find( id );
367 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTraitAtScope( id, scope );
368 }
369
370 bool addedIdConflicts( DeclarationWithType *existing, DeclarationWithType *added ) {
371 // if we're giving the same name mangling to things of different types then there is something wrong
372 assert( (dynamic_cast<ObjectDecl*>( added ) && dynamic_cast<ObjectDecl*>( existing ) )
373 || (dynamic_cast<FunctionDecl*>( added ) && dynamic_cast<FunctionDecl*>( existing ) ) );
374
375 if ( LinkageSpec::isOverridable( existing->get_linkage() ) ) {
376 // new definition shadows the autogenerated one, even at the same scope
377 return false;
378 } else if ( LinkageSpec::isMangled( added->get_linkage() ) || ResolvExpr::typesCompatible( added->get_type(), existing->get_type(), Indexer() ) ) {
379 // typesCompatible doesn't really do the right thing here. When checking compatibility of function types,
380 // we should ignore outermost pointer qualifiers, except _Atomic?
381 FunctionDecl *newentry = dynamic_cast< FunctionDecl* >( added );
382 FunctionDecl *oldentry = dynamic_cast< FunctionDecl* >( existing );
383 if ( newentry && oldentry ) {
384 if ( newentry->get_statements() && oldentry->get_statements() ) {
385 throw SemanticError( "duplicate function definition for ", added );
386 } // if
387 } else {
388 // two objects with the same mangled name defined in the same scope.
389 // both objects must be marked extern or both must be intrinsic for this to be okay
390 // xxx - perhaps it's actually if either is intrinsic then this is okay?
391 // might also need to be same storage class?
392 ObjectDecl *newobj = dynamic_cast< ObjectDecl* >( added );
393 ObjectDecl *oldobj = dynamic_cast< ObjectDecl* >( existing );
394 if ( ! newobj->get_storageClasses().is_extern && ! oldobj->get_storageClasses().is_extern ) {
395 throw SemanticError( "duplicate object definition for ", added );
396 } // if
397 } // if
398 } else {
399 throw SemanticError( "duplicate definition for ", added );
400 } // if
401
402 return true;
403 }
404
405 void Indexer::addId( DeclarationWithType *decl ) {
406 debugPrint( "Adding Id " << decl->name << std::endl );
407 makeWritable();
408
409 const std::string &name = decl->name;
410 std::string mangleName;
411 if ( LinkageSpec::isOverridable( decl->linkage ) ) {
412 // mangle the name without including the appropriate suffix, so overridable routines are placed into the
413 // same "bucket" as their user defined versions.
414 mangleName = Mangler::mangle( decl, false );
415 } else {
416 mangleName = Mangler::mangle( decl );
417 } // if
418
419 // this ensures that no two declarations with the same unmangled name at the same scope both have C linkage
420 if ( ! LinkageSpec::isMangled( decl->linkage ) ) {
421 // NOTE this is broken in Richard's original code in such a way that it never triggers (it
422 // doesn't check decls that have the same manglename, and all C-linkage decls are defined to
423 // have their name as their manglename, hence the error can never trigger).
424 // The code here is closer to correct, but name mangling would have to be completely
425 // isomorphic to C type-compatibility, which it may not be.
426 if ( hasIncompatibleCDecl( name, mangleName, scope ) ) {
427 throw SemanticError( "conflicting overload of C function ", decl );
428 }
429 } else {
430 // Check that a Cforall declaration doesn't overload any C declaration
431 if ( hasCompatibleCDecl( name, mangleName, scope ) ) {
432 throw SemanticError( "Cforall declaration hides C function ", decl );
433 }
434 }
435
436 // Skip repeat declarations of the same identifier
437 DeclarationWithType *existing = lookupIdAtScope( name, mangleName, scope );
438 if ( existing && addedIdConflicts( existing, decl ) ) return;
439
440 // add to indexer
441 tables->idTable[ name ][ mangleName ] = decl;
442 ++tables->size;
443 }
444
445 bool addedTypeConflicts( NamedTypeDecl *existing, NamedTypeDecl *added ) {
446 if ( existing->get_base() == 0 ) {
447 return false;
448 } else if ( added->get_base() == 0 ) {
449 return true;
450 } else {
451 throw SemanticError( "redeclaration of ", added );
452 }
453 }
454
455 void Indexer::addType( NamedTypeDecl *decl ) {
456 debugPrint( "Adding type " << decl->name << std::endl );
457 makeWritable();
458
459 const std::string &id = decl->get_name();
460 TypeTable::iterator existing = tables->typeTable.find( id );
461 if ( existing == tables->typeTable.end() ) {
462 NamedTypeDecl *parent = tables->base.lookupTypeAtScope( id, scope );
463 if ( ! parent || ! addedTypeConflicts( parent, decl ) ) {
464 tables->typeTable.insert( existing, std::make_pair( id, decl ) );
465 ++tables->size;
466 }
467 } else {
468 if ( ! addedTypeConflicts( existing->second, decl ) ) {
469 existing->second = decl;
470 }
471 }
472 }
473
474 bool addedDeclConflicts( AggregateDecl *existing, AggregateDecl *added ) {
475 if ( existing->get_members().empty() ) {
476 return false;
477 } else if ( ! added->get_members().empty() ) {
478 throw SemanticError( "redeclaration of ", added );
479 } // if
480 return true;
481 }
482
483 void Indexer::addStruct( const std::string &id ) {
484 debugPrint( "Adding fwd decl for struct " << id << std::endl );
485 addStruct( new StructDecl( id ) );
486 }
487
488 void Indexer::addStruct( StructDecl *decl ) {
489 debugPrint( "Adding struct " << decl->name << std::endl );
490 makeWritable();
491
492 const std::string &id = decl->get_name();
493 StructTable::iterator existing = tables->structTable.find( id );
494 if ( existing == tables->structTable.end() ) {
495 StructDecl *parent = tables->base.lookupStructAtScope( id, scope );
496 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
497 tables->structTable.insert( existing, std::make_pair( id, decl ) );
498 ++tables->size;
499 }
500 } else {
501 if ( ! addedDeclConflicts( existing->second, decl ) ) {
502 existing->second = decl;
503 }
504 }
505 }
506
507 void Indexer::addEnum( EnumDecl *decl ) {
508 debugPrint( "Adding enum " << decl->name << std::endl );
509 makeWritable();
510
511 const std::string &id = decl->get_name();
512 EnumTable::iterator existing = tables->enumTable.find( id );
513 if ( existing == tables->enumTable.end() ) {
514 EnumDecl *parent = tables->base.lookupEnumAtScope( id, scope );
515 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
516 tables->enumTable.insert( existing, std::make_pair( id, decl ) );
517 ++tables->size;
518 }
519 } else {
520 if ( ! addedDeclConflicts( existing->second, decl ) ) {
521 existing->second = decl;
522 }
523 }
524 }
525
526 void Indexer::addUnion( const std::string &id ) {
527 debugPrint( "Adding fwd decl for union " << id << std::endl );
528 addUnion( new UnionDecl( id ) );
529 }
530
531 void Indexer::addUnion( UnionDecl *decl ) {
532 debugPrint( "Adding union " << decl->name << std::endl );
533 makeWritable();
534
535 const std::string &id = decl->get_name();
536 UnionTable::iterator existing = tables->unionTable.find( id );
537 if ( existing == tables->unionTable.end() ) {
538 UnionDecl *parent = tables->base.lookupUnionAtScope( id, scope );
539 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
540 tables->unionTable.insert( existing, std::make_pair( id, decl ) );
541 ++tables->size;
542 }
543 } else {
544 if ( ! addedDeclConflicts( existing->second, decl ) ) {
545 existing->second = decl;
546 }
547 }
548 }
549
550 void Indexer::addTrait( TraitDecl *decl ) {
551 debugPrint( "Adding trait " << decl->name << std::endl );
552 makeWritable();
553
554 const std::string &id = decl->get_name();
555 TraitTable::iterator existing = tables->traitTable.find( id );
556 if ( existing == tables->traitTable.end() ) {
557 TraitDecl *parent = tables->base.lookupTraitAtScope( id, scope );
558 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
559 tables->traitTable.insert( existing, std::make_pair( id, decl ) );
560 ++tables->size;
561 }
562 } else {
563 if ( ! addedDeclConflicts( existing->second, decl ) ) {
564 existing->second = decl;
565 }
566 }
567 }
568
569 void Indexer::addIds( const std::list< DeclarationWithType * > & decls ) {
570 for ( auto d : decls ) {
571 addId( d );
572 }
573 }
574
575 void Indexer::addTypes( const std::list< TypeDecl * > & tds ) {
576 for ( auto td : tds ) {
577 addType( td );
578 addIds( td->assertions );
579 }
580 }
581
582 void Indexer::addFunctionType( FunctionType * ftype ) {
583 addTypes( ftype->forall );
584 addIds( ftype->returnVals );
585 addIds( ftype->parameters );
586 }
587
588 void Indexer::enterScope() {
589 ++scope;
590
591 if ( doDebug ) {
592 std::cerr << "--- Entering scope " << scope << std::endl;
593 }
594 }
595
596 void Indexer::leaveScope() {
597 using std::cerr;
598
599 assert( scope > 0 && "cannot leave initial scope" );
600 if ( doDebug ) {
601 cerr << "--- Leaving scope " << scope << " containing" << std::endl;
602 }
603 --scope;
604
605 while ( tables && tables->scope > scope ) {
606 if ( doDebug ) {
607 dump( tables->idTable, cerr );
608 dump( tables->typeTable, cerr );
609 dump( tables->structTable, cerr );
610 dump( tables->enumTable, cerr );
611 dump( tables->unionTable, cerr );
612 dump( tables->traitTable, cerr );
613 }
614
615 // swap tables for base table until we find one at an appropriate scope
616 Indexer::Impl *base = newRef( tables->base.tables );
617 deleteRef( tables );
618 tables = base;
619 }
620 }
621
622 void Indexer::print( std::ostream &os, int indent ) const {
623 using std::cerr;
624
625 if ( tables ) {
626 os << "--- scope " << tables->scope << " ---" << std::endl;
627
628 os << "===idTable===" << std::endl;
629 dump( tables->idTable, os );
630 os << "===typeTable===" << std::endl;
631 dump( tables->typeTable, os );
632 os << "===structTable===" << std::endl;
633 dump( tables->structTable, os );
634 os << "===enumTable===" << std::endl;
635 dump( tables->enumTable, os );
636 os << "===unionTable===" << std::endl;
637 dump( tables->unionTable, os );
638 os << "===contextTable===" << std::endl;
639 dump( tables->traitTable, os );
640
641 tables->base.print( os, indent );
642 } else {
643 os << "--- end ---" << std::endl;
644 }
645
646 }
647} // namespace SymTab
648
649// Local Variables: //
650// tab-width: 4 //
651// mode: c++ //
652// compile-command: "make install" //
653// End: //
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