| 1 | #ifndef ALTERNATIVEFINDER_H
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| 2 | #define ALTERNATIVEFINDER_H
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| 3 |
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| 4 | #include <set>
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| 5 |
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| 6 | #include "Alternative.h"
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| 7 | #include "Unify.h"
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| 8 | #include "SynTree/SynTree.h"
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| 9 | #include "SymTab/Indexer.h"
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| 10 | #include "SynTree/TypeSubstitution.h"
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| 11 |
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| 12 | namespace ResolvExpr {
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| 13 | class AlternativeFinder : public Visitor {
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| 14 | public:
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| 15 | AlternativeFinder( const SymTab::Indexer &indexer, const TypeEnvironment &env );
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| 16 | void find( Expression *expr, bool adjust = false );
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| 17 | void findWithAdjustment( Expression *expr );
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| 18 | AltList &get_alternatives() { return alternatives; }
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| 19 |
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| 20 | // make this look like an STL container so that we can apply generic algorithms
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| 21 | typedef Alternative value_type;
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| 22 | typedef AltList::iterator iterator;
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| 23 | typedef AltList::const_iterator const_iterator;
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| 24 | AltList::iterator begin() { return alternatives.begin(); }
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| 25 | AltList::iterator end() { return alternatives.end(); }
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| 26 | AltList::const_iterator begin() const { return alternatives.begin(); }
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| 27 | AltList::const_iterator end() const { return alternatives.end(); }
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| 28 |
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| 29 | const SymTab::Indexer &get_indexer() const { return indexer; }
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| 30 | const TypeEnvironment &get_environ() const { return env; }
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| 31 | private:
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| 32 | virtual void visit( ApplicationExpr *applicationExpr );
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| 33 | virtual void visit( UntypedExpr *untypedExpr );
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| 34 | virtual void visit( AddressExpr *addressExpr );
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| 35 | virtual void visit( CastExpr *castExpr );
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| 36 | virtual void visit( UntypedMemberExpr *memberExpr );
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| 37 | virtual void visit( MemberExpr *memberExpr );
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| 38 | virtual void visit( NameExpr *variableExpr );
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| 39 | virtual void visit( VariableExpr *variableExpr );
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| 40 | virtual void visit( ConstantExpr *constantExpr );
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| 41 | virtual void visit( SizeofExpr *sizeofExpr );
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| 42 | virtual void visit( AttrExpr *attrExpr );
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| 43 | virtual void visit( LogicalExpr *logicalExpr );
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| 44 | virtual void visit( ConditionalExpr *conditionalExpr );
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| 45 | virtual void visit( CommaExpr *commaExpr );
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| 46 | virtual void visit( TupleExpr *tupleExpr );
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| 47 | public: // xxx - temporary hack - should make Tuples::TupleAssignment a friend
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| 48 | template< typename InputIterator, typename OutputIterator >
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| 49 | void findSubExprs( InputIterator begin, InputIterator end, OutputIterator out );
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| 50 |
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| 51 | private:
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| 52 | template< typename StructOrUnionType > void addAggMembers( StructOrUnionType *aggInst, Expression *expr, const Cost &newCost, const std::string &name );
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| 53 | bool instantiateFunction( std::list< DeclarationWithType* >& formals, /*const*/ AltList &actuals, bool isVarArgs, OpenVarSet& openVars, TypeEnvironment &resultEnv, AssertionSet &resultNeed, AssertionSet &resultHave );
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| 54 | template< typename OutputIterator >
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| 55 | void makeFunctionAlternatives( const Alternative &func, FunctionType *funcType, AltList &actualAlt, OutputIterator out );
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| 56 | template< typename OutputIterator >
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| 57 | void inferParameters( const AssertionSet &need, AssertionSet &have, const Alternative &newAlt, OpenVarSet &openVars, OutputIterator out );
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| 58 | void resolveAttr( DeclarationWithType *funcDecl, FunctionType *function, Type *argType, const TypeEnvironment &env );
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| 59 |
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| 60 | const SymTab::Indexer &indexer;
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| 61 | AltList alternatives;
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| 62 | const TypeEnvironment &env;
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| 63 | }; // AlternativeFinder
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| 64 |
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| 65 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer, TypeEnvironment &env );
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| 66 | } // namespace ResolvExpr
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| 67 |
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| 68 | #endif // ALTERNATIVEFINDER_H
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