source: src/InitTweak/InitTweak.cc@ 903f7c3

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 903f7c3 was 08d5507b, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

change type of function specifier and storage class to bit fields
  • Property mode set to 100644
File size: 21.5 KB
RevLine 
[4d2434a]1#include <algorithm>
[2b46a13]2#include "InitTweak.h"
3#include "SynTree/Visitor.h"
4#include "SynTree/Statement.h"
5#include "SynTree/Initializer.h"
6#include "SynTree/Expression.h"
[f9cebb5]7#include "SynTree/Attribute.h"
[2b46a13]8#include "GenPoly/GenPoly.h"
[4d4882a]9#include "ResolvExpr/typeops.h"
[2b46a13]10
11namespace InitTweak {
[64071c2]12 namespace {
13 class HasDesignations : public Visitor {
14 public:
15 bool hasDesignations = false;
16 template<typename Init>
17 void handleInit( Init * init ) {
18 if ( ! init->get_designators().empty() ) hasDesignations = true;
19 else Visitor::visit( init );
20 }
21 virtual void visit( SingleInit * singleInit ) { handleInit( singleInit); }
22 virtual void visit( ListInit * listInit ) { handleInit( listInit); }
23 };
[2b46a13]24
[dcd73d1]25 class InitDepthChecker : public Visitor {
26 public:
27 bool depthOkay = true;
28 Type * type;
29 int curDepth = 0, maxDepth = 0;
30 InitDepthChecker( Type * type ) : type( type ) {
31 Type * t = type;
32 while ( ArrayType * at = dynamic_cast< ArrayType * >( t ) ) {
33 maxDepth++;
34 t = at->get_base();
35 }
36 maxDepth++;
37 }
38 virtual void visit( ListInit * listInit ) {
39 curDepth++;
40 if ( curDepth > maxDepth ) depthOkay = false;
41 Visitor::visit( listInit );
42 curDepth--;
43 }
44 };
45
[4d2434a]46 class InitFlattener : public Visitor {
[64071c2]47 public:
48 virtual void visit( SingleInit * singleInit );
49 virtual void visit( ListInit * listInit );
50 std::list< Expression * > argList;
51 };
[2b46a13]52
[4d2434a]53 void InitFlattener::visit( SingleInit * singleInit ) {
[64071c2]54 argList.push_back( singleInit->get_value()->clone() );
55 }
[2b46a13]56
[4d2434a]57 void InitFlattener::visit( ListInit * listInit ) {
58 // flatten nested list inits
59 std::list<Initializer*>::iterator it = listInit->begin();
60 for ( ; it != listInit->end(); ++it ) {
[64071c2]61 (*it)->accept( *this );
62 }
63 }
64 }
[2b46a13]65
[64071c2]66 std::list< Expression * > makeInitList( Initializer * init ) {
[4d2434a]67 InitFlattener flattener;
68 maybeAccept( init, flattener );
69 return flattener.argList;
[64071c2]70 }
[2b46a13]71
[64071c2]72 bool isDesignated( Initializer * init ) {
73 HasDesignations finder;
74 maybeAccept( init, finder );
75 return finder.hasDesignations;
[dcd73d1]76 }
77
78 bool checkInitDepth( ObjectDecl * objDecl ) {
79 InitDepthChecker checker( objDecl->get_type() );
80 maybeAccept( objDecl->get_init(), checker );
81 return checker.depthOkay;
[64071c2]82 }
[2b46a13]83
[39f84a4]84 class InitExpander::ExpanderImpl {
85 public:
86 virtual std::list< Expression * > next( std::list< Expression * > & indices ) = 0;
[4d2434a]87 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ) = 0;
[39f84a4]88 };
89
90 class InitImpl : public InitExpander::ExpanderImpl {
91 public:
[4d2434a]92 InitImpl( Initializer * init ) : init( init ) {}
[39f84a4]93
94 virtual std::list< Expression * > next( std::list< Expression * > & indices ) {
95 // this is wrong, but just a placeholder for now
[4d2434a]96 // if ( ! flattened ) flatten( indices );
97 // return ! inits.empty() ? makeInitList( inits.front() ) : std::list< Expression * >();
98 return makeInitList( init );
[39f84a4]99 }
[4d2434a]100
101 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices );
[39f84a4]102 private:
[4d2434a]103 Initializer * init;
[39f84a4]104 };
105
106 class ExprImpl : public InitExpander::ExpanderImpl {
107 public:
108 ExprImpl( Expression * expr ) : arg( expr ) {}
109
[9b4c936]110 ~ExprImpl() { delete arg; }
111
[39f84a4]112 virtual std::list< Expression * > next( std::list< Expression * > & indices ) {
113 std::list< Expression * > ret;
114 Expression * expr = maybeClone( arg );
115 if ( expr ) {
116 for ( std::list< Expression * >::reverse_iterator it = indices.rbegin(); it != indices.rend(); ++it ) {
117 // go through indices and layer on subscript exprs ?[?]
118 ++it;
119 UntypedExpr * subscriptExpr = new UntypedExpr( new NameExpr( "?[?]") );
120 subscriptExpr->get_args().push_back( expr );
121 subscriptExpr->get_args().push_back( (*it)->clone() );
122 expr = subscriptExpr;
123 }
124 ret.push_back( expr );
125 }
126 return ret;
127 }
[4d2434a]128
129 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices );
[39f84a4]130 private:
131 Expression * arg;
132 };
133
134 InitExpander::InitExpander( Initializer * init ) : expander( new InitImpl( init ) ) {}
135
136 InitExpander::InitExpander( Expression * expr ) : expander( new ExprImpl( expr ) ) {}
137
138 std::list< Expression * > InitExpander::operator*() {
139 return cur;
140 }
141
142 InitExpander & InitExpander::operator++() {
143 cur = expander->next( indices );
144 return *this;
145 }
146
147 // use array indices list to build switch statement
148 void InitExpander::addArrayIndex( Expression * index, Expression * dimension ) {
149 indices.push_back( index );
150 indices.push_back( dimension );
151 }
152
[4d2434a]153 void InitExpander::clearArrayIndices() {
[9b4c936]154 deleteAll( indices );
[4d2434a]155 indices.clear();
156 }
157
158 namespace {
[f9cebb5]159 /// given index i, dimension d, initializer init, and callExpr f, generates
160 /// if (i < d) f(..., init)
161 /// ++i;
162 /// so that only elements within the range of the array are constructed
[4d2434a]163 template< typename OutIterator >
[f9cebb5]164 void buildCallExpr( UntypedExpr * callExpr, Expression * index, Expression * dimension, Initializer * init, OutIterator out ) {
[4d2434a]165 UntypedExpr * cond = new UntypedExpr( new NameExpr( "?<?") );
166 cond->get_args().push_back( index->clone() );
167 cond->get_args().push_back( dimension->clone() );
168
169 std::list< Expression * > args = makeInitList( init );
170 callExpr->get_args().splice( callExpr->get_args().end(), args );
171
172 *out++ = new IfStmt( noLabels, cond, new ExprStmt( noLabels, callExpr ), NULL );
173
174 UntypedExpr * increment = new UntypedExpr( new NameExpr( "++?" ) );
175 increment->get_args().push_back( new AddressExpr( index->clone() ) );
176 *out++ = new ExprStmt( noLabels, increment );
177 }
178
179 template< typename OutIterator >
180 void build( UntypedExpr * callExpr, InitExpander::IndexList::iterator idx, InitExpander::IndexList::iterator idxEnd, Initializer * init, OutIterator out ) {
181 if ( idx == idxEnd ) return;
182 Expression * index = *idx++;
183 assert( idx != idxEnd );
184 Expression * dimension = *idx++;
185
[f9cebb5]186 // xxx - may want to eventually issue a warning here if we can detect
187 // that the number of elements exceeds to dimension of the array
[4d2434a]188 if ( idx == idxEnd ) {
189 if ( ListInit * listInit = dynamic_cast< ListInit * >( init ) ) {
190 for ( Initializer * init : *listInit ) {
[f9cebb5]191 buildCallExpr( callExpr->clone(), index, dimension, init, out );
[4d2434a]192 }
193 } else {
[f9cebb5]194 buildCallExpr( callExpr->clone(), index, dimension, init, out );
[4d2434a]195 }
196 } else {
197 std::list< Statement * > branches;
198
199 unsigned long cond = 0;
200 ListInit * listInit = dynamic_cast< ListInit * >( init );
201 if ( ! listInit ) {
202 // xxx - this shouldn't be an error, but need a way to
203 // terminate without creating output, so should catch this error
204 throw SemanticError( "unbalanced list initializers" );
205 }
[f9cebb5]206
207 static UniqueName targetLabel( "L__autogen__" );
208 Label switchLabel( targetLabel.newName(), 0, std::list< Attribute * >{ new Attribute("unused") } );
[4d2434a]209 for ( Initializer * init : *listInit ) {
210 Expression * condition;
211 // check for designations
212 // if ( init-> ) {
213 condition = new ConstantExpr( Constant::from_ulong( cond ) );
214 ++cond;
215 // } else {
216 // condition = // ... take designation
217 // cond = // ... take designation+1
218 // }
219 std::list< Statement * > stmts;
220 build( callExpr, idx, idxEnd, init, back_inserter( stmts ) );
[f9cebb5]221 stmts.push_back( new BranchStmt( noLabels, switchLabel, BranchStmt::Break ) );
[4d2434a]222 CaseStmt * caseStmt = new CaseStmt( noLabels, condition, stmts );
223 branches.push_back( caseStmt );
224 }
225 *out++ = new SwitchStmt( noLabels, index->clone(), branches );
[f9cebb5]226 *out++ = new NullStmt( std::list<Label>{ switchLabel } );
[4d2434a]227 }
228 }
229 }
230
231 // if array came with an initializer list: initialize each element
232 // may have more initializers than elements in the array - need to check at each index that
233 // we haven't exceeded size.
234 // may have fewer initializers than elements in the array - need to default construct
235 // remaining elements.
236 // To accomplish this, generate switch statement, consuming all of expander's elements
237 Statement * InitImpl::buildListInit( UntypedExpr * dst, std::list< Expression * > & indices ) {
238 if ( ! init ) return NULL;
[f9cebb5]239 CompoundStmt * block = new CompoundStmt( noLabels );
240 build( dst, indices.begin(), indices.end(), init, back_inserter( block->get_kids() ) );
241 if ( block->get_kids().empty() ) {
242 delete block;
[4d2434a]243 return NULL;
244 } else {
245 init = NULL; // init was consumed in creating the list init
[f9cebb5]246 return block;
[4d2434a]247 }
[39f84a4]248 }
249
[4d2434a]250 Statement * ExprImpl::buildListInit( UntypedExpr * dst, std::list< Expression * > & indices ) {
251 return NULL;
252 }
253
254 Statement * InitExpander::buildListInit( UntypedExpr * dst ) {
255 return expander->buildListInit( dst, indices );
256 }
257
[64071c2]258 bool tryConstruct( ObjectDecl * objDecl ) {
259 return ! LinkageSpec::isBuiltin( objDecl->get_linkage() ) &&
260 (objDecl->get_init() == NULL ||
[1ba88a0]261 ( objDecl->get_init() != NULL && objDecl->get_init()->get_maybeConstructed() ))
[08d5507b]262 && ! objDecl->get_storageClasses().is_extern;
[64071c2]263 }
[2b46a13]264
[4d2434a]265 class CallFinder : public Visitor {
266 public:
267 typedef Visitor Parent;
268 CallFinder( const std::list< std::string > & names ) : names( names ) {}
269
270 virtual void visit( ApplicationExpr * appExpr ) {
271 handleCallExpr( appExpr );
272 }
273
274 virtual void visit( UntypedExpr * untypedExpr ) {
275 handleCallExpr( untypedExpr );
276 }
277
278 std::list< Expression * > * matches;
279 private:
280 const std::list< std::string > names;
281
282 template< typename CallExpr >
283 void handleCallExpr( CallExpr * expr ) {
284 Parent::visit( expr );
285 std::string fname = getFunctionName( expr );
286 if ( std::find( names.begin(), names.end(), fname ) != names.end() ) {
287 matches->push_back( expr );
[cad355a]288 }
[64071c2]289 }
[4d2434a]290 };
291
292 void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches ) {
293 static CallFinder finder( std::list< std::string >{ "?{}", "^?{}" } );
294 finder.matches = &matches;
295 maybeAccept( stmt, finder );
[64071c2]296 }
[4d2434a]297
298 Expression * getCtorDtorCall( Statement * stmt ) {
299 std::list< Expression * > matches;
300 collectCtorDtorCalls( stmt, matches );
301 assert( matches.size() <= 1 );
302 return matches.size() == 1 ? matches.front() : NULL;
303 }
304
[aedfd91]305 namespace {
[599b386]306 DeclarationWithType * getCalledFunction( Expression * expr );
307
308 template<typename CallExpr>
309 DeclarationWithType * handleDerefCalledFunction( CallExpr * expr ) {
310 // (*f)(x) => should get "f"
311 std::string name = getFunctionName( expr );
312 assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() );
313 assertf( ! expr->get_args().empty(), "Can't get called function from dereference with no arguments" );
314 return getCalledFunction( expr->get_args().front() );
315 }
316
[ee1635c8]317 DeclarationWithType * getCalledFunction( Expression * expr ) {
318 assert( expr );
319 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) {
320 return varExpr->get_var();
321 } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( expr ) ) {
322 return memberExpr->get_member();
323 } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) {
324 return getCalledFunction( castExpr->get_arg() );
[599b386]325 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( expr ) ) {
326 return handleDerefCalledFunction( untypedExpr );
327 } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * > ( expr ) ) {
328 return handleDerefCalledFunction( appExpr );
[f3b0a07]329 } else if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( expr ) ) {
330 return getCalledFunction( addrExpr->get_arg() );
[ee1635c8]331 }
332 return nullptr;
[aedfd91]333 }
334 }
[70f89d00]335
[b7b8674]336 DeclarationWithType * getFunction( Expression * expr ) {
337 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) {
338 return getCalledFunction( appExpr->get_function() );
339 } else if ( UntypedExpr * untyped = dynamic_cast< UntypedExpr * > ( expr ) ) {
340 return getCalledFunction( untyped->get_function() );
341 }
342 assertf( false, "getFunction received unknown expression: %s", toString( expr ).c_str() );
343 }
344
[aedfd91]345 ApplicationExpr * isIntrinsicCallExpr( Expression * expr ) {
346 ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr );
347 if ( ! appExpr ) return NULL;
[ee1635c8]348 DeclarationWithType * function = getCalledFunction( appExpr->get_function() );
[f3b0a07]349 assertf( function, "getCalledFunction returned nullptr: %s", toString( appExpr->get_function() ).c_str() );
[64071c2]350 // check for Intrinsic only - don't want to remove all overridable ctor/dtors because autogenerated ctor/dtor
351 // will call all member dtors, and some members may have a user defined dtor.
[ee1635c8]352 return function->get_linkage() == LinkageSpec::Intrinsic ? appExpr : NULL;
[aedfd91]353 }
354
[a465caff]355 namespace {
356 template <typename Predicate>
357 bool allofCtorDtor( Statement * stmt, const Predicate & pred ) {
358 std::list< Expression * > callExprs;
359 collectCtorDtorCalls( stmt, callExprs );
360 // if ( callExprs.empty() ) return false; // xxx - do I still need this check?
361 return std::all_of( callExprs.begin(), callExprs.end(), pred);
362 }
363 }
364
[f9cebb5]365 bool isIntrinsicSingleArgCallStmt( Statement * stmt ) {
[a465caff]366 return allofCtorDtor( stmt, []( Expression * callExpr ){
[4d2434a]367 if ( ApplicationExpr * appExpr = isIntrinsicCallExpr( callExpr ) ) {
[906e24d]368 FunctionType *funcType = GenPoly::getFunctionType( appExpr->get_function()->get_result() );
[4d2434a]369 assert( funcType );
370 return funcType->get_parameters().size() == 1;
371 }
372 return false;
373 });
[64071c2]374 }
[f1b1e4c]375
[a465caff]376 bool isIntrinsicCallStmt( Statement * stmt ) {
377 return allofCtorDtor( stmt, []( Expression * callExpr ) {
378 return isIntrinsicCallExpr( callExpr );
379 });
380 }
381
[64071c2]382 namespace {
383 template<typename CallExpr>
384 Expression *& callArg( CallExpr * callExpr, unsigned int pos ) {
[d1969a6]385 if ( pos >= callExpr->get_args().size() ) assertf( false, "asking for argument that doesn't exist. Return NULL/throw exception?" );
[64071c2]386 for ( Expression *& arg : callExpr->get_args() ) {
387 if ( pos == 0 ) return arg;
388 pos--;
389 }
390 assert( false );
391 }
392 }
[f1b1e4c]393
[64071c2]394 Expression *& getCallArg( Expression * callExpr, unsigned int pos ) {
395 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( callExpr ) ) {
396 return callArg( appExpr, pos );
397 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( callExpr ) ) {
398 return callArg( untypedExpr, pos );
[f3b0a07]399 } else if ( TupleAssignExpr * tupleExpr = dynamic_cast< TupleAssignExpr * > ( callExpr ) ) {
400 std::list< Statement * > & stmts = tupleExpr->get_stmtExpr()->get_statements()->get_kids();
401 assertf( ! stmts.empty(), "TupleAssignExpr somehow has no statements." );
402 ExprStmt * stmt = safe_dynamic_cast< ExprStmt * >( stmts.back() );
403 TupleExpr * tuple = safe_dynamic_cast< TupleExpr * >( stmt->get_expr() );
404 assertf( ! tuple->get_exprs().empty(), "TupleAssignExpr somehow has empty tuple expr." );
405 return getCallArg( tuple->get_exprs().front(), pos );
[64071c2]406 } else {
[f3b0a07]407 assertf( false, "Unexpected expression type passed to getCallArg: %s", toString( callExpr ).c_str() );
[64071c2]408 }
409 }
[f1b1e4c]410
[64071c2]411 namespace {
[599b386]412 std::string funcName( Expression * func );
413
414 template<typename CallExpr>
415 std::string handleDerefName( CallExpr * expr ) {
416 // (*f)(x) => should get name "f"
417 std::string name = getFunctionName( expr );
418 assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() );
419 assertf( ! expr->get_args().empty(), "Can't get function name from dereference with no arguments" );
420 return funcName( expr->get_args().front() );
421 }
422
[c738ca4]423 std::string funcName( Expression * func ) {
[64071c2]424 if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( func ) ) {
425 return nameExpr->get_name();
426 } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( func ) ) {
427 return varExpr->get_var()->get_name();
[c738ca4]428 } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( func ) ) {
429 return funcName( castExpr->get_arg() );
[ee1635c8]430 } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( func ) ) {
431 return memberExpr->get_member()->get_name();
[96a10cdd]432 } else if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * > ( func ) ) {
[fd782b2]433 return funcName( memberExpr->get_member() );
[599b386]434 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( func ) ) {
435 return handleDerefName( untypedExpr );
436 } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( func ) ) {
437 return handleDerefName( appExpr );
[64071c2]438 } else {
[d1969a6]439 assertf( false, "Unexpected expression type being called as a function in call expression" );
[64071c2]440 }
441 }
442 }
[70f89d00]443
[64071c2]444 std::string getFunctionName( Expression * expr ) {
[599b386]445 // there's some unforunate overlap here with getCalledFunction. Ideally this would be able to use getCalledFunction and
446 // return the name of the DeclarationWithType, but this needs to work for NameExpr and UntypedMemberExpr, where getCalledFunction
447 // can't possibly do anything reasonable.
[64071c2]448 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) {
[c738ca4]449 return funcName( appExpr->get_function() );
[64071c2]450 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * > ( expr ) ) {
[c738ca4]451 return funcName( untypedExpr->get_function() );
[64071c2]452 } else {
[c738ca4]453 std::cerr << expr << std::endl;
[d1969a6]454 assertf( false, "Unexpected expression type passed to getFunctionName" );
[64071c2]455 }
456 }
[10a7775]457
[64071c2]458 Type * getPointerBase( Type * type ) {
459 if ( PointerType * ptrType = dynamic_cast< PointerType * >( type ) ) {
460 return ptrType->get_base();
461 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
462 return arrayType->get_base();
463 } else {
464 return NULL;
465 }
466 }
[10a7775]467
[64071c2]468 Type * isPointerType( Type * type ) {
469 if ( getPointerBase( type ) ) return type;
470 else return NULL;
471 }
[40e636a]472
473 class ConstExprChecker : public Visitor {
474 public:
475 ConstExprChecker() : isConstExpr( true ) {}
476
477 virtual void visit( ApplicationExpr *applicationExpr ) { isConstExpr = false; }
478 virtual void visit( UntypedExpr *untypedExpr ) { isConstExpr = false; }
[1ba88a0]479 virtual void visit( NameExpr *nameExpr ) {
480 // xxx - temporary hack, because 0 and 1 really should be constexprs, even though they technically aren't in Cforall today
481 if ( nameExpr->get_name() != "0" && nameExpr->get_name() != "1" ) isConstExpr = false;
482 }
483 // virtual void visit( CastExpr *castExpr ) { isConstExpr = false; }
484 virtual void visit( AddressExpr *addressExpr ) {
485 // address of a variable or member expression is constexpr
486 Expression * arg = addressExpr->get_arg();
487 if ( ! dynamic_cast< NameExpr * >( arg) && ! dynamic_cast< VariableExpr * >( arg ) && ! dynamic_cast< MemberExpr * >( arg ) && ! dynamic_cast< UntypedMemberExpr * >( arg ) ) isConstExpr = false;
488 }
[40e636a]489 virtual void visit( LabelAddressExpr *labAddressExpr ) { isConstExpr = false; }
490 virtual void visit( UntypedMemberExpr *memberExpr ) { isConstExpr = false; }
491 virtual void visit( MemberExpr *memberExpr ) { isConstExpr = false; }
492 virtual void visit( VariableExpr *variableExpr ) { isConstExpr = false; }
493 // these might be okay?
494 // virtual void visit( SizeofExpr *sizeofExpr );
495 // virtual void visit( AlignofExpr *alignofExpr );
496 // virtual void visit( UntypedOffsetofExpr *offsetofExpr );
497 // virtual void visit( OffsetofExpr *offsetofExpr );
498 // virtual void visit( OffsetPackExpr *offsetPackExpr );
499 // virtual void visit( AttrExpr *attrExpr );
500 // virtual void visit( CommaExpr *commaExpr );
501 // virtual void visit( LogicalExpr *logicalExpr );
502 // virtual void visit( ConditionalExpr *conditionalExpr );
503 virtual void visit( TypeExpr *typeExpr ) { isConstExpr = false; }
504 virtual void visit( AsmExpr *asmExpr ) { isConstExpr = false; }
505 virtual void visit( UntypedValofExpr *valofExpr ) { isConstExpr = false; }
506 virtual void visit( CompoundLiteralExpr *compLitExpr ) { isConstExpr = false; }
[907eccb]507 virtual void visit( UntypedTupleExpr *tupleExpr ) { isConstExpr = false; }
[6eb8948]508 virtual void visit( TupleExpr *tupleExpr ) { isConstExpr = false; }
509 virtual void visit( TupleAssignExpr *tupleExpr ) { isConstExpr = false; }
[40e636a]510
511 bool isConstExpr;
512 };
513
514 bool isConstExpr( Expression * expr ) {
515 if ( expr ) {
516 ConstExprChecker checker;
517 expr->accept( checker );
518 return checker.isConstExpr;
519 }
520 return true;
521 }
522
523 bool isConstExpr( Initializer * init ) {
524 if ( init ) {
525 ConstExprChecker checker;
526 init->accept( checker );
527 return checker.isConstExpr;
528 } // if
529 // for all intents and purposes, no initializer means const expr
530 return true;
531 }
532
[79970ed]533 bool isConstructor( const std::string & str ) { return str == "?{}"; }
534 bool isDestructor( const std::string & str ) { return str == "^?{}"; }
[ee1635c8]535 bool isAssignment( const std::string & str ) { return str == "?=?"; }
[79970ed]536 bool isCtorDtor( const std::string & str ) { return isConstructor( str ) || isDestructor( str ); }
[ee1635c8]537 bool isCtorDtorAssign( const std::string & str ) { return isCtorDtor( str ) || isAssignment( str ); }
[4d4882a]538
[ee1635c8]539 FunctionDecl * isCopyFunction( Declaration * decl, const std::string & fname ) {
[4d4882a]540 FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl );
541 if ( ! function ) return 0;
[ee1635c8]542 if ( function->get_name() != fname ) return 0;
[4d4882a]543 FunctionType * ftype = function->get_functionType();
544 if ( ftype->get_parameters().size() != 2 ) return 0;
545
546 Type * t1 = ftype->get_parameters().front()->get_type();
547 Type * t2 = ftype->get_parameters().back()->get_type();
548 PointerType * ptrType = dynamic_cast< PointerType * > ( t1 );
549 assert( ptrType );
550
[ee1635c8]551 if ( ResolvExpr::typesCompatibleIgnoreQualifiers( ptrType->get_base(), t2, SymTab::Indexer() ) ) {
[4d4882a]552 return function;
553 } else {
[ee1635c8]554 return nullptr;
[4d4882a]555 }
556 }
[ee1635c8]557
[207c7e1d]558 FunctionDecl * isAssignment( Declaration * decl ) {
559 return isCopyFunction( decl, "?=?" );
560 }
561 FunctionDecl * isDestructor( Declaration * decl ) {
562 if ( isDestructor( decl->get_name() ) ) {
563 return dynamic_cast< FunctionDecl * >( decl );
564 }
565 return nullptr;
566 }
567 FunctionDecl * isDefaultConstructor( Declaration * decl ) {
568 if ( isConstructor( decl->get_name() ) ) {
569 if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) {
570 if ( func->get_functionType()->get_parameters().size() == 1 ) {
571 return func;
572 }
573 }
574 }
575 return nullptr;
576 }
[ee1635c8]577 FunctionDecl * isCopyConstructor( Declaration * decl ) {
578 return isCopyFunction( decl, "?{}" );
579 }
[2b46a13]580}
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