source: src/InitTweak/InitTweak.h @ c09e4bc

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// RemoveInit.h --
//
// Author           : Rob Schluntz
// Created On       : Fri May 13 11:26:36 2016
// Last Modified By : Rob Schluntz
// Last Modified On : Fri May 13 11:35:36 2016
// Update Count     : 3
//

#ifndef INIT_TWEAK_H
#define INIT_TWEAK_H

#include <string>
#include <list>

#include "SynTree/SynTree.h"
#include "SynTree/Declaration.h"
#include "SynTree/Mutator.h"

// helper functions for initialization
namespace InitTweak {
        /// transform Initializer into an argument list that can be passed to a call expression
        std::list< Expression * > makeInitList( Initializer * init );

        /// True if the resolver should try to construct objDecl
        bool tryConstruct( ObjectDecl * objDecl );

        /// True if the Initializer contains designations
        bool isDesignated( Initializer * init );

  /// Non-Null if expr is a call expression whose target function is intrinsic
  ApplicationExpr * isIntrinsicCallExpr( Expression * expr );

        /// True if stmt is a call statement where the function called is intrinsic and takes one parameter.
        /// Intended to be used for default ctor/dtor calls, but might have use elsewhere.
        /// Currently has assertions that make it less than fully general.
        bool isIntrinsicSingleArgCallStmt( Statement * expr );

        /// get all Ctor/Dtor call expressions from a Statement
        void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches );

        /// get the Ctor/Dtor call expression from a Statement that looks like a generated ctor/dtor call
        Expression * getCtorDtorCall( Statement * stmt );

        /// returns the name of the function being called
        std::string getFunctionName( Expression * expr );

        /// returns the argument to a call expression in position N indexed from 0
        Expression *& getCallArg( Expression * callExpr, unsigned int pos );

        /// returns the base type of a PointerType or ArrayType, else returns NULL
        Type * getPointerBase( Type * );

        /// returns the argument if it is a PointerType or ArrayType, else returns NULL
        Type * isPointerType( Type * );

        /// returns true if expr is trivially a compile-time constant
        bool isConstExpr( Expression * expr );
        bool isConstExpr( Initializer * init );

        class InitExpander {
        public:
                // expand by stepping through init to get each list of arguments
                InitExpander( Initializer * init );

                // always expand to expr
                InitExpander( Expression * expr );

                // iterator-like interface
                std::list< Expression * > operator*();
                InitExpander & operator++();

                // builds statement which has the same semantics as a C-style list initializer
                // (for array initializers) using callExpr as the base expression to perform initialization
                Statement * buildListInit( UntypedExpr * callExpr );
                void addArrayIndex( Expression * index, Expression * dimension );
                void clearArrayIndices();

                class ExpanderImpl;
        private:
                std::shared_ptr< ExpanderImpl > expander;
                std::list< Expression * > cur;

                // invariant: list of size 2N (elements come in pairs [index, dimension])
                typedef std::list< Expression * > IndexList;
                IndexList indices;
        };
} // namespace

#endif // INITTWEAK_GENINIT_H

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //