source: src/Common/PassVisitor.h@ 91cfa34

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 91cfa34 was cc32d83, checked in by Rob Schluntz <rschlunt@…>, 7 years ago

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1#pragma once
2
3// IWYU pragma: private, include "Common/PassVisitor.h"
4
5#include <stack>
6
7#include "Common/utility.h"
8
9#include "SynTree/Mutator.h"
10#include "SynTree/Visitor.h"
11
12#include "SymTab/Indexer.h"
13
14#include "SynTree/Attribute.h"
15#include "SynTree/Initializer.h"
16#include "SynTree/Statement.h"
17#include "SynTree/Type.h"
18#include "SynTree/Declaration.h"
19#include "SynTree/Expression.h"
20#include "SynTree/Constant.h"
21
22class TypeSubstitution;
23
24#include "PassVisitor.proto.h"
25
26//-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
27// Templated visitor type
28// To use declare a PassVisitor< YOUR VISITOR TYPE >
29// The visitor type should specify the previsit/postvisit/premutate/postmutate for types that are desired.
30// Note: previsit/postvisit/premutate/postmutate must be **public** members
31//
32// Several additional features are available through inheritance
33// | WithTypeSubstitution - provides polymorphic TypeSubstitution * env for the current expression
34// | WithStmtsToAdd - provides the ability to insert statements before or after the current statement by adding new statements into
35// stmtsToAddBefore or stmtsToAddAfter respectively.
36// | WithShortCircuiting - provides the ability to skip visiting child nodes; set visit_children to false in pre{visit,mutate} to skip visiting children
37// | WithGuards - provides the ability to save/restore data like a LIFO stack; to save, call GuardValue with the variable to save, the variable
38// will automatically be restored to its previous value after the corresponding postvisit/postmutate teminates.
39//-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
40template< typename pass_type >
41class PassVisitor final : public Visitor, public Mutator {
42public:
43
44 template< typename... Args >
45 PassVisitor(Args &&... args)
46 : pass( std::forward<Args>( args )... )
47 {
48 typedef PassVisitor<pass_type> this_t;
49 this_t * const * visitor = visitor_impl(pass, 0);
50 if(visitor) {
51 *const_cast<this_t **>( visitor ) = this;
52 }
53 }
54
55 virtual ~PassVisitor() = default;
56
57 pass_type pass;
58
59 virtual void visit( ObjectDecl * objectDecl ) override final;
60 virtual void visit( FunctionDecl * functionDecl ) override final;
61 virtual void visit( StructDecl * aggregateDecl ) override final;
62 virtual void visit( UnionDecl * aggregateDecl ) override final;
63 virtual void visit( EnumDecl * aggregateDecl ) override final;
64 virtual void visit( TraitDecl * aggregateDecl ) override final;
65 virtual void visit( TypeDecl * typeDecl ) override final;
66 virtual void visit( TypedefDecl * typeDecl ) override final;
67 virtual void visit( AsmDecl * asmDecl ) override final;
68 virtual void visit( StaticAssertDecl * assertDecl ) override final;
69
70 virtual void visit( CompoundStmt * compoundStmt ) override final;
71 virtual void visit( ExprStmt * exprStmt ) override final;
72 virtual void visit( AsmStmt * asmStmt ) override final;
73 virtual void visit( DirectiveStmt * dirStmt ) override final;
74 virtual void visit( IfStmt * ifStmt ) override final;
75 virtual void visit( WhileStmt * whileStmt ) override final;
76 virtual void visit( ForStmt * forStmt ) override final;
77 virtual void visit( SwitchStmt * switchStmt ) override final;
78 virtual void visit( CaseStmt * caseStmt ) override final;
79 virtual void visit( BranchStmt * branchStmt ) override final;
80 virtual void visit( ReturnStmt * returnStmt ) override final;
81 virtual void visit( ThrowStmt * throwStmt ) override final;
82 virtual void visit( TryStmt * tryStmt ) override final;
83 virtual void visit( CatchStmt * catchStmt ) override final;
84 virtual void visit( FinallyStmt * finallyStmt ) override final;
85 virtual void visit( WaitForStmt * waitforStmt ) override final;
86 virtual void visit( WithStmt * withStmt ) override final;
87 virtual void visit( NullStmt * nullStmt ) override final;
88 virtual void visit( DeclStmt * declStmt ) override final;
89 virtual void visit( ImplicitCtorDtorStmt * impCtorDtorStmt ) override final;
90
91 virtual void visit( ApplicationExpr * applicationExpr ) override final;
92 virtual void visit( UntypedExpr * untypedExpr ) override final;
93 virtual void visit( NameExpr * nameExpr ) override final;
94 virtual void visit( CastExpr * castExpr ) override final;
95 virtual void visit( KeywordCastExpr * castExpr ) override final;
96 virtual void visit( VirtualCastExpr * castExpr ) override final;
97 virtual void visit( AddressExpr * addressExpr ) override final;
98 virtual void visit( LabelAddressExpr * labAddressExpr ) override final;
99 virtual void visit( UntypedMemberExpr * memberExpr ) override final;
100 virtual void visit( MemberExpr * memberExpr ) override final;
101 virtual void visit( VariableExpr * variableExpr ) override final;
102 virtual void visit( ConstantExpr * constantExpr ) override final;
103 virtual void visit( SizeofExpr * sizeofExpr ) override final;
104 virtual void visit( AlignofExpr * alignofExpr ) override final;
105 virtual void visit( UntypedOffsetofExpr * offsetofExpr ) override final;
106 virtual void visit( OffsetofExpr * offsetofExpr ) override final;
107 virtual void visit( OffsetPackExpr * offsetPackExpr ) override final;
108 virtual void visit( AttrExpr * attrExpr ) override final;
109 virtual void visit( LogicalExpr * logicalExpr ) override final;
110 virtual void visit( ConditionalExpr * conditionalExpr ) override final;
111 virtual void visit( CommaExpr * commaExpr ) override final;
112 virtual void visit( TypeExpr * typeExpr ) override final;
113 virtual void visit( AsmExpr * asmExpr ) override final;
114 virtual void visit( ImplicitCopyCtorExpr * impCpCtorExpr ) override final;
115 virtual void visit( ConstructorExpr * ctorExpr ) override final;
116 virtual void visit( CompoundLiteralExpr * compLitExpr ) override final;
117 virtual void visit( RangeExpr * rangeExpr ) override final;
118 virtual void visit( UntypedTupleExpr * tupleExpr ) override final;
119 virtual void visit( TupleExpr * tupleExpr ) override final;
120 virtual void visit( TupleIndexExpr * tupleExpr ) override final;
121 virtual void visit( TupleAssignExpr * assignExpr ) override final;
122 virtual void visit( StmtExpr * stmtExpr ) override final;
123 virtual void visit( UniqueExpr * uniqueExpr ) override final;
124 virtual void visit( UntypedInitExpr * initExpr ) override final;
125 virtual void visit( InitExpr * initExpr ) override final;
126 virtual void visit( DeletedExpr * delExpr ) override final;
127
128 virtual void visit( VoidType * basicType ) override final;
129 virtual void visit( BasicType * basicType ) override final;
130 virtual void visit( PointerType * pointerType ) override final;
131 virtual void visit( ArrayType * arrayType ) override final;
132 virtual void visit( ReferenceType * referenceType ) override final;
133 virtual void visit( FunctionType * functionType ) override final;
134 virtual void visit( StructInstType * aggregateUseType ) override final;
135 virtual void visit( UnionInstType * aggregateUseType ) override final;
136 virtual void visit( EnumInstType * aggregateUseType ) override final;
137 virtual void visit( TraitInstType * aggregateUseType ) override final;
138 virtual void visit( TypeInstType * aggregateUseType ) override final;
139 virtual void visit( TupleType * tupleType ) override final;
140 virtual void visit( TypeofType * typeofType ) override final;
141 virtual void visit( AttrType * attrType ) override final;
142 virtual void visit( VarArgsType * varArgsType ) override final;
143 virtual void visit( ZeroType * zeroType ) override final;
144 virtual void visit( OneType * oneType ) override final;
145
146 virtual void visit( Designation * designation ) override final;
147 virtual void visit( SingleInit * singleInit ) override final;
148 virtual void visit( ListInit * listInit ) override final;
149 virtual void visit( ConstructorInit * ctorInit ) override final;
150
151 virtual void visit( Subrange * subrange ) override final;
152
153 virtual void visit( Constant * constant ) override final;
154
155 virtual void visit( Attribute * attribute ) override final;
156
157 virtual DeclarationWithType * mutate( ObjectDecl * objectDecl ) override final;
158 virtual DeclarationWithType * mutate( FunctionDecl * functionDecl ) override final;
159 virtual Declaration * mutate( StructDecl * aggregateDecl ) override final;
160 virtual Declaration * mutate( UnionDecl * aggregateDecl ) override final;
161 virtual Declaration * mutate( EnumDecl * aggregateDecl ) override final;
162 virtual Declaration * mutate( TraitDecl * aggregateDecl ) override final;
163 virtual Declaration * mutate( TypeDecl * typeDecl ) override final;
164 virtual Declaration * mutate( TypedefDecl * typeDecl ) override final;
165 virtual AsmDecl * mutate( AsmDecl * asmDecl ) override final;
166 virtual StaticAssertDecl * mutate( StaticAssertDecl * assertDecl ) override final;
167
168 virtual CompoundStmt * mutate( CompoundStmt * compoundStmt ) override final;
169 virtual Statement * mutate( ExprStmt * exprStmt ) override final;
170 virtual Statement * mutate( AsmStmt * asmStmt ) override final;
171 virtual Statement * mutate( DirectiveStmt * dirStmt ) override final;
172 virtual Statement * mutate( IfStmt * ifStmt ) override final;
173 virtual Statement * mutate( WhileStmt * whileStmt ) override final;
174 virtual Statement * mutate( ForStmt * forStmt ) override final;
175 virtual Statement * mutate( SwitchStmt * switchStmt ) override final;
176 virtual Statement * mutate( CaseStmt * caseStmt ) override final;
177 virtual Statement * mutate( BranchStmt * branchStmt ) override final;
178 virtual Statement * mutate( ReturnStmt * returnStmt ) override final;
179 virtual Statement * mutate( ThrowStmt * throwStmt ) override final;
180 virtual Statement * mutate( TryStmt * tryStmt ) override final;
181 virtual Statement * mutate( CatchStmt * catchStmt ) override final;
182 virtual Statement * mutate( FinallyStmt * finallyStmt ) override final;
183 virtual Statement * mutate( WaitForStmt * waitforStmt ) override final;
184 virtual Statement * mutate( WithStmt * withStmt ) override final;
185 virtual NullStmt * mutate( NullStmt * nullStmt ) override final;
186 virtual Statement * mutate( DeclStmt * declStmt ) override final;
187 virtual Statement * mutate( ImplicitCtorDtorStmt * impCtorDtorStmt ) override final;
188
189 virtual Expression * mutate( ApplicationExpr * applicationExpr ) override final;
190 virtual Expression * mutate( UntypedExpr * untypedExpr ) override final;
191 virtual Expression * mutate( NameExpr * nameExpr ) override final;
192 virtual Expression * mutate( AddressExpr * addrExpr ) override final;
193 virtual Expression * mutate( LabelAddressExpr * labAddressExpr ) override final;
194 virtual Expression * mutate( CastExpr * castExpr ) override final;
195 virtual Expression * mutate( KeywordCastExpr * castExpr ) override final;
196 virtual Expression * mutate( VirtualCastExpr * castExpr ) override final;
197 virtual Expression * mutate( UntypedMemberExpr * memberExpr ) override final;
198 virtual Expression * mutate( MemberExpr * memberExpr ) override final;
199 virtual Expression * mutate( VariableExpr * variableExpr ) override final;
200 virtual Expression * mutate( ConstantExpr * constantExpr ) override final;
201 virtual Expression * mutate( SizeofExpr * sizeofExpr ) override final;
202 virtual Expression * mutate( AlignofExpr * alignofExpr ) override final;
203 virtual Expression * mutate( UntypedOffsetofExpr * offsetofExpr ) override final;
204 virtual Expression * mutate( OffsetofExpr * offsetofExpr ) override final;
205 virtual Expression * mutate( OffsetPackExpr * offsetPackExpr ) override final;
206 virtual Expression * mutate( AttrExpr * attrExpr ) override final;
207 virtual Expression * mutate( LogicalExpr * logicalExpr ) override final;
208 virtual Expression * mutate( ConditionalExpr * conditionalExpr ) override final;
209 virtual Expression * mutate( CommaExpr * commaExpr ) override final;
210 virtual Expression * mutate( TypeExpr * typeExpr ) override final;
211 virtual Expression * mutate( AsmExpr * asmExpr ) override final;
212 virtual Expression * mutate( ImplicitCopyCtorExpr * impCpCtorExpr ) override final;
213 virtual Expression * mutate( ConstructorExpr * ctorExpr ) override final;
214 virtual Expression * mutate( CompoundLiteralExpr * compLitExpr ) override final;
215 virtual Expression * mutate( RangeExpr * rangeExpr ) override final;
216 virtual Expression * mutate( UntypedTupleExpr * tupleExpr ) override final;
217 virtual Expression * mutate( TupleExpr * tupleExpr ) override final;
218 virtual Expression * mutate( TupleIndexExpr * tupleExpr ) override final;
219 virtual Expression * mutate( TupleAssignExpr * assignExpr ) override final;
220 virtual Expression * mutate( StmtExpr * stmtExpr ) override final;
221 virtual Expression * mutate( UniqueExpr * uniqueExpr ) override final;
222 virtual Expression * mutate( UntypedInitExpr * initExpr ) override final;
223 virtual Expression * mutate( InitExpr * initExpr ) override final;
224 virtual Expression * mutate( DeletedExpr * delExpr ) override final;
225
226 virtual Type * mutate( VoidType * basicType ) override final;
227 virtual Type * mutate( BasicType * basicType ) override final;
228 virtual Type * mutate( PointerType * pointerType ) override final;
229 virtual Type * mutate( ArrayType * arrayType ) override final;
230 virtual Type * mutate( ReferenceType * referenceType ) override final;
231 virtual Type * mutate( FunctionType * functionType ) override final;
232 virtual Type * mutate( StructInstType * aggregateUseType ) override final;
233 virtual Type * mutate( UnionInstType * aggregateUseType ) override final;
234 virtual Type * mutate( EnumInstType * aggregateUseType ) override final;
235 virtual Type * mutate( TraitInstType * aggregateUseType ) override final;
236 virtual Type * mutate( TypeInstType * aggregateUseType ) override final;
237 virtual Type * mutate( TupleType * tupleType ) override final;
238 virtual Type * mutate( TypeofType * typeofType ) override final;
239 virtual Type * mutate( AttrType * attrType ) override final;
240 virtual Type * mutate( VarArgsType * varArgsType ) override final;
241 virtual Type * mutate( ZeroType * zeroType ) override final;
242 virtual Type * mutate( OneType * oneType ) override final;
243
244 virtual Designation * mutate( Designation * designation ) override final;
245 virtual Initializer * mutate( SingleInit * singleInit ) override final;
246 virtual Initializer * mutate( ListInit * listInit ) override final;
247 virtual Initializer * mutate( ConstructorInit * ctorInit ) override final;
248
249 virtual Subrange * mutate( Subrange * subrange ) override final;
250
251 virtual Constant * mutate( Constant * constant ) override final;
252
253 virtual Attribute * mutate( Attribute * attribute ) override final;
254
255 virtual TypeSubstitution * mutate( TypeSubstitution * sub ) final;
256
257private:
258 template<typename pass_t> friend void acceptAll( std::list< Declaration* > &decls, PassVisitor< pass_t >& visitor );
259 template<typename pass_t> friend void mutateAll( std::list< Declaration* > &decls, PassVisitor< pass_t >& visitor );
260 template< typename TreeType, typename pass_t > friend void maybeAccept_impl( TreeType * tree, PassVisitor< pass_t > & visitor );
261 template< typename TreeType, typename pass_t > friend void maybeMutate_impl( TreeType *& tree, PassVisitor< pass_t > & mutator );
262 template< typename Container, typename pass_t > friend void maybeAccept_impl( Container & container, PassVisitor< pass_t > & visitor );
263 template< typename Container, typename pass_t > friend void maybeMutate_impl( Container & container, PassVisitor< pass_t > & mutator );
264
265 template<typename node_type> void call_previsit ( node_type * node ) { previsit_impl ( pass, node, 0 ); }
266 template<typename node_type> void call_postvisit( node_type * node ) { postvisit_impl( pass, node, 0 ); }
267
268 template<typename node_type> void call_premutate ( node_type * node ) { premutate_impl( pass, node, 0 ); }
269 template<typename return_type, typename node_type> return_type call_postmutate ( node_type * node ) { return postmutate_impl<return_type>( pass, node, 0 ); }
270
271 void call_beginScope() { begin_scope_impl( pass, 0 ); }
272 void call_endScope () { end_scope_impl ( pass, 0 ); }
273
274 void set_env( TypeSubstitution * env ) { set_env_impl( pass, env, 0); }
275
276 template< typename func_t >
277 void handleStatementList( std::list< Statement * > & statements, func_t func );
278 void visitStatementList ( std::list< Statement* > &statements );
279 void mutateStatementList( std::list< Statement* > &statements );
280
281 template< typename func_t >
282 Statement * handleStatement( Statement * stmt, func_t func );
283 Statement * visitStatement ( Statement * stmt );
284 Statement * mutateStatement( Statement * stmt );
285
286 template< typename func_t >
287 Expression * handleExpression( Expression * expr, func_t func );
288 Expression * visitExpression ( Expression * expr );
289 Expression * mutateExpression( Expression * expr );
290
291
292 TypeSubstitution ** get_env_ptr () { return env_impl ( pass, 0); }
293 std::list< Statement* > * get_beforeStmts() { return stmtsToAddBefore_impl( pass, 0); }
294 std::list< Statement* > * get_afterStmts () { return stmtsToAddAfter_impl ( pass, 0); }
295 std::list< Declaration* > * get_beforeDecls() { return declsToAddBefore_impl( pass, 0); }
296 std::list< Declaration* > * get_afterDecls () { return declsToAddAfter_impl ( pass, 0); }
297
298 bool get_visit_children () { bool_ref * ptr = visit_children_impl(pass, 0); return ptr ? *ptr : true; }
299 bool_ref * get_visit_children_ptr() { return visit_children_impl(pass, 0); }
300
301 void indexerScopeEnter () { indexer_impl_enterScope ( pass, 0 ); }
302 void indexerScopeLeave () { indexer_impl_leaveScope ( pass, 0 ); }
303 void indexerAddId ( DeclarationWithType * node ) { indexer_impl_addId ( pass, 0, node ); }
304 void indexerAddType ( NamedTypeDecl * node ) { indexer_impl_addType ( pass, 0, node ); }
305 void indexerAddStruct ( const std::string & id ) { indexer_impl_addStruct ( pass, 0, id ); }
306 void indexerAddStruct ( StructDecl * node ) { indexer_impl_addStruct ( pass, 0, node ); }
307 void indexerAddStructFwd( StructDecl * node ) { indexer_impl_addStructFwd( pass, 0, node ); }
308 void indexerAddEnum ( EnumDecl * node ) { indexer_impl_addEnum ( pass, 0, node ); }
309 void indexerAddUnion ( const std::string & id ) { indexer_impl_addUnion ( pass, 0, id ); }
310 void indexerAddUnion ( UnionDecl * node ) { indexer_impl_addUnion ( pass, 0, node ); }
311 void indexerAddUnionFwd ( UnionDecl * node ) { indexer_impl_addUnionFwd ( pass, 0, node ); }
312 void indexerAddTrait ( TraitDecl * node ) { indexer_impl_addTrait ( pass, 0, node ); }
313 void indexerAddWith ( std::list< Expression * > & exprs, BaseSyntaxNode * withStmt ) { indexer_impl_addWith ( pass, 0, exprs, withStmt ); }
314
315
316 template< typename TreeType, typename VisitorType >
317 friend inline void indexerScopedAccept( TreeType * tree, VisitorType &visitor );
318
319 template< typename TreeType, typename VisitorType >
320 friend inline void indexerScopedMutate( TreeType *& tree, VisitorType &visitor );
321};
322
323template<typename pass_type, typename T>
324void GuardValue( pass_type * pass, T& val ) {
325 pass->at_cleanup( [ val ]( void * newVal ) {
326 * static_cast< T * >( newVal ) = val;
327 }, static_cast< void * >( & val ) );
328}
329
330class WithTypeSubstitution {
331protected:
332 WithTypeSubstitution() = default;
333 ~WithTypeSubstitution() = default;
334
335public:
336 TypeSubstitution * env = nullptr;
337};
338
339class WithStmtsToAdd {
340protected:
341 WithStmtsToAdd() = default;
342 ~WithStmtsToAdd() = default;
343
344public:
345 std::list< Statement* > stmtsToAddBefore;
346 std::list< Statement* > stmtsToAddAfter;
347};
348
349class WithDeclsToAdd {
350protected:
351 WithDeclsToAdd() = default;
352 ~WithDeclsToAdd() {
353 assert( declsToAddBefore.empty() );
354 }
355
356public:
357 std::list< Declaration* > declsToAddBefore;
358 std::list< Declaration* > declsToAddAfter;
359};
360
361class WithShortCircuiting {
362protected:
363 WithShortCircuiting() = default;
364 ~WithShortCircuiting() = default;
365
366public:
367 bool_ref visit_children;
368};
369
370class WithGuards {
371protected:
372 WithGuards() = default;
373 ~WithGuards() = default;
374
375public:
376 at_cleanup_t at_cleanup;
377
378 template< typename T >
379 void GuardValue( T& val ) {
380 at_cleanup( [ val ]( void * newVal ) {
381 * static_cast< T * >( newVal ) = val;
382 }, static_cast< void * >( & val ) );
383 }
384
385 template< typename T >
386 void GuardScope( T& val ) {
387 val.beginScope();
388 at_cleanup( []( void * val ) {
389 static_cast< T * >( val )->endScope();
390 }, static_cast< void * >( & val ) );
391 }
392
393 template< typename Func >
394 void GuardAction( Func func ) {
395 at_cleanup( [func](__attribute__((unused)) void *) { func(); }, nullptr );
396 }
397};
398
399template<typename pass_type>
400class WithVisitorRef {
401protected:
402 WithVisitorRef() {}
403 ~WithVisitorRef() {}
404
405public:
406 PassVisitor<pass_type> * const visitor = nullptr;
407};
408
409class WithIndexer {
410protected:
411 WithIndexer() {}
412 ~WithIndexer() {}
413
414public:
415 SymTab::Indexer indexer;
416};
417
418#include "SynTree/TypeSubstitution.h"
419#include "PassVisitor.impl.h"
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