source: src/ResolvExpr/RenameVars.cc @ caab997

//
// 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.
//
// RenameVars.cc --
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 12:05:18 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Wed Mar  2 17:36:32 2016
// Update Count     : 5
//

#include <ext/alloc_traits.h>      // for __alloc_traits<>::value_type
#include <memory>                  // for allocator_traits<>::value_type
#include <sstream>                 // for operator<<, basic_ostream, ostring...
#include <utility>                 // for pair

#include "Common/SemanticError.h"  // for SemanticError
#include "RenameVars.h"
#include "SynTree/Declaration.h"   // for DeclarationWithType, TypeDecl, Dec...
#include "SynTree/Expression.h"    // for Expression
#include "SynTree/Type.h"          // for Type, TypeInstType, TraitInstType
#include "SynTree/Visitor.h"       // for acceptAll, maybeAccept

namespace ResolvExpr {
        RenameVars global_renamer;

        RenameVars::RenameVars() : level( 0 ), resetCount( 0 ) {
                mapStack.push_front( std::map< std::string, std::string >() );
        }

        void RenameVars::reset() {
                level = 0;
                resetCount++;
        }

        void RenameVars::visit( VoidType *voidType ) {
                typeBefore( voidType );
                typeAfter( voidType );
        }

        void RenameVars::visit( BasicType *basicType ) {
                typeBefore( basicType );
                typeAfter( basicType );
        }

        void RenameVars::visit( PointerType *pointerType ) {
                typeBefore( pointerType );
                maybeAccept( pointerType->get_base(), *this );
                typeAfter( pointerType );
        }

        void RenameVars::visit( ArrayType *arrayType ) {
                typeBefore( arrayType );
                maybeAccept( arrayType->get_dimension(), *this );
                maybeAccept( arrayType->get_base(), *this );
                typeAfter( arrayType );
        }

        void RenameVars::visit( FunctionType *functionType ) {
                typeBefore( functionType );
                acceptAll( functionType->get_returnVals(), *this );
                acceptAll( functionType->get_parameters(), *this );
                typeAfter( functionType );
        }

        void RenameVars::visit( StructInstType *aggregateUseType ) {
                typeBefore( aggregateUseType );
                acceptAll( aggregateUseType->get_parameters(), *this );
                typeAfter( aggregateUseType );
        }

        void RenameVars::visit( UnionInstType *aggregateUseType ) {
                typeBefore( aggregateUseType );
                acceptAll( aggregateUseType->get_parameters(), *this );
                typeAfter( aggregateUseType );
        }

        void RenameVars::visit( EnumInstType *aggregateUseType ) {
                typeBefore( aggregateUseType );
                acceptAll( aggregateUseType->get_parameters(), *this );
                typeAfter( aggregateUseType );
        }

        void RenameVars::visit( TraitInstType *aggregateUseType ) {
                typeBefore( aggregateUseType );
                acceptAll( aggregateUseType->get_parameters(), *this );
                typeAfter( aggregateUseType );
        }

        void RenameVars::visit( TypeInstType *instType ) {
                typeBefore( instType );
                std::map< std::string, std::string >::const_iterator i = mapStack.front().find( instType->get_name() );
                if ( i != mapStack.front().end() ) {
                        instType->set_name( i->second );
                } else {
                } // if
                acceptAll( instType->get_parameters(), *this );
                typeAfter( instType );
        }

        void RenameVars::visit( TupleType *tupleType ) {
                typeBefore( tupleType );
                acceptAll( tupleType->get_types(), *this );
                typeAfter( tupleType );
        }

        void RenameVars::visit( VarArgsType *varArgsType ) {
                typeBefore( varArgsType );
                typeAfter( varArgsType );
        }

        void RenameVars::visit( ZeroType *zeroType ) {
                typeBefore( zeroType );
                typeAfter( zeroType );
        }

        void RenameVars::visit( OneType *oneType ) {
                typeBefore( oneType );
                typeAfter( oneType );
        }

        void RenameVars::typeBefore( Type *type ) {
                if ( ! type->get_forall().empty() ) {
                        // copies current name mapping into new mapping
                        mapStack.push_front( mapStack.front() );
                        // renames all "forall" type names to `_${level}_${name}'
                        for ( Type::ForallList::iterator i = type->get_forall().begin(); i != type->get_forall().end(); ++i ) {
                                std::ostringstream output;
                                output << "_" << resetCount << "_" << level << "_" << (*i)->get_name();
                                std::string newname( output.str() );
                                mapStack.front()[ (*i)->get_name() ] = newname;
                                (*i)->set_name( newname );
                                // ditto for assertion names, the next level in
                                level++;
                                acceptAll( (*i)->get_assertions(), *this );
                        } // for
                } // if
        }

        void RenameVars::typeAfter( Type *type ) {
                // clears name mapping added by typeBefore()
                if ( ! type->get_forall().empty() ) {
                        mapStack.pop_front();
                } // if
        }

} // namespace ResolvExpr

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