source: src/Parser/ExpressionNode.cc @ 36ebd03

//
// 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.
//
// ExpressionNode.cc -- 
// 
// Author           : Rodolfo G. Esteves
// Created On       : Sat May 16 13:17:07 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Mon Feb  1 13:32:30 2016
// Update Count     : 271
// 

#include <cassert>
#include <cctype>
#include <algorithm>
#include <sstream>
#include <cstdio>
#include <climits>

#include "ParseNode.h"
#include "SynTree/Constant.h"
#include "SynTree/Expression.h"
#include "Common/UnimplementedError.h"
#include "parseutility.h"
#include "Common/utility.h"

using namespace std;

ExpressionNode::ExpressionNode() : ParseNode(), argName( 0 ) {}

ExpressionNode::ExpressionNode( const string *name ) : ParseNode( name ), argName( 0 ) {}

ExpressionNode::ExpressionNode( const ExpressionNode &other ) : ParseNode( other.name ) {
        if ( other.argName ) {
                argName = other.argName->clone();
        } else {
                argName = 0;
        } // if
}

ExpressionNode * ExpressionNode::set_argName( const std::string *aName ) {
        argName = new VarRefNode( aName );
        return this;
}

ExpressionNode * ExpressionNode::set_argName( ExpressionNode *aDesignator ) {
        argName = aDesignator;
        return this;
}

void ExpressionNode::printDesignation( std::ostream &os, int indent ) const {
        if ( argName ) {
                os << string( indent, ' ' ) << "(designated by:  ";
                argName->printOneLine( os, indent );
                os << ")" << std::endl;
        } // if
}

//##############################################################################

NullExprNode::NullExprNode() {}

NullExprNode *NullExprNode::clone() const {
        return new NullExprNode();
}

void NullExprNode::print( std::ostream & os, int indent ) const {
        printDesignation( os );
        os << "null expression";
}

void NullExprNode::printOneLine( std::ostream & os, int indent ) const {
        printDesignation( os );
        os << "null";
}

Expression *NullExprNode::build() const {
        return 0;
}

CommaExprNode *ExpressionNode::add_to_list( ExpressionNode *exp ) {
        return new CommaExprNode( this, exp );
}

//##############################################################################

static inline bool checkU( char c ) { return c == 'u' || c == 'U'; }
static inline bool checkL( char c ) { return c == 'l' || c == 'L'; }
static inline bool checkF( char c ) { return c == 'f' || c == 'F'; }
static inline bool checkD( char c ) { return c == 'd' || c == 'D'; }
static inline bool checkI( char c ) { return c == 'i' || c == 'I'; }
static inline bool checkX( char c ) { return c == 'x' || c == 'X'; }

// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
//
//              prefix action constant action suffix
//
// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
//
//              constant BEGIN CONT ...
//              <CONT>(...)? BEGIN 0 ... // possible empty suffix
//
// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
// type.

ConstantNode::ConstantNode( Type t, string *inVal ) : type( t ), value( *inVal ) {
        // lexing divides constants into 4 kinds
        switch ( type ) {
          case Integer:
                {
                        static const BasicType::Kind kind[2][3] = {
                                { BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt },
                                { BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt },
                        };
                        bool dec = true, Unsigned = false;                      // decimal, unsigned constant
                        int size;                                                                       // 0 => int, 1 => long, 2 => long long
                        unsigned long long v;                                           // converted integral value
                        size_t last = value.length() - 1;                       // last character of constant

                        if ( value[0] == '0' ) {                                        // octal constant ?
                                dec = false;
                                if ( last != 0 && checkX( value[1] ) ) { // hex constant ?
                                        sscanf( (char *)value.c_str(), "%llx", &v );
                                        //printf( "%llx %llu\n", v, v );
                                } else {
                                        sscanf( (char *)value.c_str(), "%llo", &v );
                                        //printf( "%llo %llu\n", v, v );
                                } // if
                        } else {                                                                        // decimal constant ?
                                sscanf( (char *)value.c_str(), "%llu", &v );
                                //printf( "%llu %llu\n", v, v );
                        } // if

                        if ( v <= INT_MAX ) {                                           // signed int
                                size = 0;
                        } else if ( v <= UINT_MAX && ! dec ) {          // unsigned int
                                size = 0;
                                Unsigned = true;                                                // unsigned
                        } else if ( v <= LONG_MAX ) {                           // signed long int
                                size = 1;
                        } else if ( v <= ULONG_MAX && ( ! dec || LONG_MAX == LLONG_MAX ) ) { // signed long int
                                size = 1;
                                Unsigned = true;                                                // unsigned long int
                        } else if ( v <= LLONG_MAX ) {                          // signed long long int
                                size = 2;
                        } else {                                                                        // unsigned long long int
                                size = 2;
                                Unsigned = true;                                                // unsigned long long int
                        } // if

                        if ( checkU( value[last] ) ) {                          // suffix 'u' ?
                                Unsigned = true;
                                if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'l' ?
                                        size = 1;
                                        if ( last > 1 && checkL( value[ last - 2 ] ) ) { // suffix 'll' ?
                                                size = 2;
                                        } // if
                                } // if
                        } else if ( checkL( value[ last ] ) ) {         // suffix 'l' ?
                                size = 1;
                                if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'll' ?
                                        size = 2;
                                        if ( last > 1 && checkU( value[ last - 2 ] ) ) { // suffix 'u' ?
                                                Unsigned = true;
                                        } // if
                                } else {
                                        if ( last > 0 && checkU( value[ last - 1 ] ) ) { // suffix 'u' ?
                                                Unsigned = true;
                                        } // if
                                } // if
                        } // if
                        btype = kind[Unsigned][size];                           // lookup constant type
                        break;
                }
          case Float:
                {
                        static const BasicType::Kind kind[2][3] = {
                                { BasicType::Float, BasicType::Double, BasicType::LongDouble },
                                { BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
                        };
                        bool complx = false;                                            // real, complex
                        int size = 1;                                                           // 0 => float, 1 => double (default), 2 => long double
                        // floating-point constant has minimum of 2 characters: 1. or .1
                        size_t last = value.length() - 1;

                        if ( checkI( value[last] ) ) {                          // imaginary ?
                                complx = true;
                                last -= 1;                                                              // backup one character
                        } // if
                        if ( checkF( value[last] ) ) {                          // float ?
                                size = 0;
                        } else if ( checkD( value[last] ) ) {           // double ?
                                size = 1;
                        } else if ( checkL( value[last] ) ) {           // long double ?
                                size = 2;
                        } // if
                        if ( ! complx && checkI( value[last - 1] ) ) { // imaginary ?
                                complx = true;
                        } // if
                        btype = kind[complx][size];                                     // lookup constant type
                        break;
                }
          case Character:
                btype = BasicType::Char;                                                // default
                if ( string( "LUu" ).find( value[0] ) != string::npos ) {
                        // ???
                } // if
                break;
          case String:
                // array of char
                if ( string( "LUu" ).find( value[0] ) != string::npos ) {
                        if ( value[0] == 'u' && value[1] == '8' ) {
                                // ???
                        } else {
                                // ???
                        } // if
                } // if
                break;
        } // switch
} // ConstantNode::ConstantNode

ConstantNode *ConstantNode::appendstr( const std::string *newValue ) {
        assert( newValue != 0 );
        assert( type == String );

        // "abc" "def" "ghi" => "abcdefghi", remove new text from quotes and insert before last quote in old string.
        value.insert( value.length() - 1, newValue->substr( 1, newValue->length() - 2 ) );
        
        delete newValue;                                                                        // allocated by lexer
        return this;
}

void ConstantNode::printOneLine( std::ostream &os, int indent ) const {
        os << string( indent, ' ' );
        printDesignation( os );

        switch ( type ) {
          case Integer:
          case Float:
                os << value ;
                break;
          case Character:
                os << "'" << value << "'";
                break;
          case String:
                os << '"' << value << '"';
                break;
        } // switch

        os << ' ';
}

void ConstantNode::print( std::ostream &os, int indent ) const {
        printOneLine( os, indent );
        os << endl;
}

Expression *ConstantNode::build() const {
        ::Type::Qualifiers q;                                                           // no qualifiers on constants

        switch ( get_type() ) {
          case String:
                {
                        // string should probably be a primitive type
                        ArrayType *at = new ArrayType( q, new BasicType( q, BasicType::Char ),
                                                                                   new ConstantExpr(
                                                                                           Constant( new BasicType( q, BasicType::UnsignedInt ),
                                                                                                                 toString( value.size()+1-2 ) ) ),  // +1 for '\0' and -2 for '"'
                                                                                   false, false );
                        return new ConstantExpr( Constant( at, value ), maybeBuild< Expression >( get_argName() ) );
                }
          default:
                return new ConstantExpr( Constant( new BasicType( q, btype ), get_value() ), maybeBuild< Expression >( get_argName() ) );
        }
}

//##############################################################################

VarRefNode::VarRefNode() : isLabel( false ) {}

VarRefNode::VarRefNode( const string *name_, bool labelp ) : ExpressionNode( name_ ), isLabel( labelp ) {}

VarRefNode::VarRefNode( const VarRefNode &other ) : ExpressionNode( other ), isLabel( other.isLabel ) {
}

Expression *VarRefNode::build() const {
        return new NameExpr( get_name(), maybeBuild< Expression >( get_argName() ) );
}

void VarRefNode::printOneLine( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << get_name() << ' ';
}

void VarRefNode::print( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << string( indent, ' ' ) << "Referencing: ";
        os << "Variable: " << get_name();
        os << endl;
}

//##############################################################################

DesignatorNode::DesignatorNode( ExpressionNode *expr, bool isArrayIndex ) : isArrayIndex( isArrayIndex ) {
        set_argName( expr );
        assert( get_argName() );

        if ( ! isArrayIndex ) {
                if ( VarRefNode * var = dynamic_cast< VarRefNode * >( expr ) ) {

                        stringstream ss( var->get_name() );
                        double value;
                        if ( ss >> value ) {
                                // this is a floating point constant. It MUST be
                                // ".0" or ".1", otherwise the program is invalid
                                if ( ! (var->get_name() == ".0" || var->get_name() == ".1") ) {
                                        throw SemanticError( "invalid designator name: " + var->get_name() );
                                } // if
                                var->set_name( var->get_name().substr(1) );
                        } // if
                } // if
        } // if
}

DesignatorNode::DesignatorNode( const DesignatorNode &other ) : ExpressionNode( other ), isArrayIndex( other.isArrayIndex ) {
}

class DesignatorFixer : public Mutator {
public:
        virtual Expression* mutate( NameExpr *nameExpr ) {
                if ( nameExpr->get_name() == "0" || nameExpr->get_name() == "1" ) {
                        Constant val( new BasicType( Type::Qualifiers(), BasicType::SignedInt ), nameExpr->get_name() );
                        delete nameExpr;
                        return new ConstantExpr( val );
                }
                return nameExpr;
        }
};

Expression *DesignatorNode::build() const {
        Expression * ret = get_argName()->build();

        if ( isArrayIndex ) {
                // need to traverse entire structure and change any instances of 0 or 1 to 
                // ConstantExpr
                DesignatorFixer fixer;
                ret = ret->acceptMutator( fixer );
        } // if

        return ret;
}

void DesignatorNode::printOneLine( std::ostream &os, int indent ) const {
        if ( get_argName() ) {
                if ( isArrayIndex ) {
                        os << "[";
                        get_argName()->printOneLine( os, indent );
                        os << "]";
                } else {
                        os << ".";
                        get_argName()->printOneLine( os, indent );
                }
        } // if
}

void DesignatorNode::print( std::ostream &os, int indent ) const {
        if ( get_argName() ) {
                if ( isArrayIndex ) {
                        os << "[";
                        get_argName()->print( os, indent );
                        os << "]";
                } else {
                        os << ".";
                        get_argName()->print( os, indent );
                }
        } // if
}

//##############################################################################

static const char *opName[] = {
        "TupleC", "Comma", "TupleFieldSel", // "TuplePFieldSel", // n-adic
        // triadic
        "Cond", "NCond",
        // diadic
        "SizeOf", "AlignOf", "OffsetOf", "Attr", "CompLit", "?+?", "?-?", "?*?", "?/?", "?%?", "||", "&&",
        "?|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
        "?=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?|=?",
        "?[?]", "FieldSel", "PFieldSel", "Range",
        // monadic
        "+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--", "&&"
};

OperatorNode::OperatorNode( Type t ) : type( t ) {}

OperatorNode::OperatorNode( const OperatorNode &other ) : ExpressionNode( other ), type( other.type ) {
}

OperatorNode::~OperatorNode() {}

OperatorNode::Type OperatorNode::get_type( void ) const{
        return type;
}

void OperatorNode::printOneLine( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << opName[ type ] << ' ';
}

void OperatorNode::print( std::ostream &os, int indent ) const{
        printDesignation( os );
        os << string( indent, ' ' ) << "Operator: " << opName[type] << endl;
        return;
}

const char *OperatorNode::get_typename( void ) const{
        return opName[ type ];
}

//##############################################################################

CompositeExprNode::CompositeExprNode() : ExpressionNode(), function( 0 ), arguments( 0 ) {
}

CompositeExprNode::CompositeExprNode( const string *name_ ) : ExpressionNode( name_ ), function( 0 ), arguments( 0 ) {
}

CompositeExprNode::CompositeExprNode( ExpressionNode *f, ExpressionNode *args ):
        function( f ), arguments( args ) {
}

CompositeExprNode::CompositeExprNode( ExpressionNode *f, ExpressionNode *arg1, ExpressionNode *arg2):
        function( f ), arguments( arg1 ) {
        arguments->set_link( arg2 );
}

CompositeExprNode::CompositeExprNode( const CompositeExprNode &other ) : ExpressionNode( other ), function( maybeClone( other.function ) ) {
        ParseNode *cur = other.arguments;
        while ( cur ) {
                if ( arguments ) {
                        arguments->set_link( cur->clone() );
                } else {
                        arguments = ( ExpressionNode*)cur->clone();
                } // if
                cur = cur->get_link();
        }
}

CompositeExprNode::~CompositeExprNode() {
        delete function;
        delete arguments;
}

#include "Common/utility.h"

Expression *CompositeExprNode::build() const {
        OperatorNode *op;
        std::list<Expression *> args;

        buildList( get_args(), args );

        if ( ! ( op = dynamic_cast<OperatorNode *>( function ) ) ) { // function as opposed to operator
                return new UntypedExpr( function->build(), args, maybeBuild< Expression >( get_argName() ));
        } // if

        switch ( op->get_type()) {
          case OperatorNode::Incr:
          case OperatorNode::Decr:
          case OperatorNode::IncrPost:
          case OperatorNode::DecrPost:
          case OperatorNode::Assign:
          case OperatorNode::MulAssn:
          case OperatorNode::DivAssn:
          case OperatorNode::ModAssn:
          case OperatorNode::PlusAssn:
          case OperatorNode::MinusAssn:
          case OperatorNode::LSAssn:
          case OperatorNode::RSAssn:
          case OperatorNode::AndAssn:
          case OperatorNode::ERAssn:
          case OperatorNode::OrAssn:
                // the rewrite rules for these expressions specify that the first argument has its address taken
                assert( ! args.empty() );
                args.front() = new AddressExpr( args.front() );
                break;
          default:
                /* do nothing */
                ;
        }

        switch ( op->get_type() ) {
          case OperatorNode::Incr:
          case OperatorNode::Decr:
          case OperatorNode::IncrPost:
          case OperatorNode::DecrPost:
          case OperatorNode::Assign:
          case OperatorNode::MulAssn:
          case OperatorNode::DivAssn:
          case OperatorNode::ModAssn:
          case OperatorNode::PlusAssn:
          case OperatorNode::MinusAssn:
          case OperatorNode::LSAssn:
          case OperatorNode::RSAssn:
          case OperatorNode::AndAssn:
          case OperatorNode::ERAssn:
          case OperatorNode::OrAssn:
          case OperatorNode::Plus:
          case OperatorNode::Minus:
          case OperatorNode::Mul:
          case OperatorNode::Div:
          case OperatorNode::Mod:
          case OperatorNode::BitOr:
          case OperatorNode::BitAnd:
          case OperatorNode::Xor:
          case OperatorNode::LShift:
          case OperatorNode::RShift:
          case OperatorNode::LThan:
          case OperatorNode::GThan:
          case OperatorNode::LEThan:
          case OperatorNode::GEThan:
          case OperatorNode::Eq:
          case OperatorNode::Neq:
          case OperatorNode::Index:
          case OperatorNode::Range:
          case OperatorNode::UnPlus:
          case OperatorNode::UnMinus:
          case OperatorNode::PointTo:
          case OperatorNode::Neg:
          case OperatorNode::BitNeg:
          case OperatorNode::LabelAddress:
                return new UntypedExpr( new NameExpr( opName[ op->get_type() ] ), args );
          case OperatorNode::AddressOf:
                assert( args.size() == 1 );
                assert( args.front() );

                return new AddressExpr( args.front() );
          case OperatorNode::Cast:
                {
                        TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args());
                        assert( arg );

                        DeclarationNode *decl_node = arg->get_decl();
                        ExpressionNode *expr_node = dynamic_cast<ExpressionNode *>( arg->get_link());

                        Type *targetType = decl_node->buildType();
                        if ( dynamic_cast< VoidType* >( targetType ) ) {
                                delete targetType;
                                return new CastExpr( expr_node->build(), maybeBuild< Expression >( get_argName() ) );
                        } else {
                                return new CastExpr( expr_node->build(),targetType, maybeBuild< Expression >( get_argName() ) );
                        } // if
                }
          case OperatorNode::FieldSel:
                {
                        assert( args.size() == 2 );

                        NameExpr *member = dynamic_cast<NameExpr *>( args.back());
                        // TupleExpr *memberTup = dynamic_cast<TupleExpr *>( args.back());

                        if ( member != 0 ) {
                                UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), args.front());
                                delete member;
                                return ret;
                                /* else if ( memberTup != 0 )
                                   {
                                   UntypedMemberExpr *ret = new UntypedMemberExpr( memberTup->get_name(), args.front());
                                   delete member;
                                   return ret;
                                   } */
                        } else
                                assert( false );
                }
          case OperatorNode::PFieldSel:
                {
                        assert( args.size() == 2 );

                        NameExpr *member = dynamic_cast<NameExpr *>( args.back());  // modify for Tuples   xxx
                        assert( member != 0 );

                        UntypedExpr *deref = new UntypedExpr( new NameExpr( "*?" ) );
                        deref->get_args().push_back( args.front() );

                        UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), deref );
                        delete member;
                        return ret;
                }
          case OperatorNode::SizeOf:
                {
                        if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args()) ) {
                                return new SizeofExpr( arg->get_decl()->buildType());
                        } else {
                                return new SizeofExpr( args.front());
                        } // if
                }
          case OperatorNode::AlignOf:
                {
                        if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args()) ) {
                                return new AlignofExpr( arg->get_decl()->buildType());
                        } else {
                                return new AlignofExpr( args.front());
                        } // if
                }
          case OperatorNode::OffsetOf:
                {
                        assert( args.size() == 2 );
                        
                        if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args() ) ) {
                                NameExpr *member = dynamic_cast<NameExpr *>( args.back() );
                                assert( member != 0 );

                                return new UntypedOffsetofExpr( arg->get_decl()->buildType(), member->get_name() );
                        } else assert( false );
                }
          case OperatorNode::Attr:
                {
                        VarRefNode *var = dynamic_cast<VarRefNode *>( get_args());
                        assert( var );
                        if ( ! get_args()->get_link() ) {
                                return new AttrExpr( var->build(), ( Expression*)0);
                        } else if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args()->get_link()) ) {
                                return new AttrExpr( var->build(), arg->get_decl()->buildType());
                        } else {
                                return new AttrExpr( var->build(), args.back());
                        } // if
                }
          case OperatorNode::CompLit:
                throw UnimplementedError( "C99 compound literals" );
                // the short-circuited operators
          case OperatorNode::Or:
          case OperatorNode::And:
                assert( args.size() == 2);
                return new LogicalExpr( notZeroExpr( args.front() ), notZeroExpr( args.back() ), ( op->get_type() == OperatorNode::And ) );
          case OperatorNode::Cond:
                {
                        assert( args.size() == 3);
                        std::list< Expression * >::const_iterator i = args.begin();
                        Expression *arg1 = notZeroExpr( *i++ );
                        Expression *arg2 = *i++;
                        Expression *arg3 = *i++;
                        return new ConditionalExpr( arg1, arg2, arg3 );
                }
          case OperatorNode::NCond:
                throw UnimplementedError( "GNU 2-argument conditional expression" );
          case OperatorNode::Comma:
                {
                        assert( args.size() == 2);
                        std::list< Expression * >::const_iterator i = args.begin();
                        Expression *ret = *i++;
                        while ( i != args.end() ) {
                                ret = new CommaExpr( ret, *i++ );
                        }
                        return ret;
                }
                // Tuples
          case OperatorNode::TupleC:
                {
                        TupleExpr *ret = new TupleExpr();
                        std::copy( args.begin(), args.end(), back_inserter( ret->get_exprs() ) );
                        return ret;
                }
          default:
                // shouldn't happen
                assert( false );
                return 0;
        } // switch
}

void CompositeExprNode::printOneLine( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << "( ";
        function->printOneLine( os, indent );
        for ( ExpressionNode *cur = arguments; cur != 0; cur = dynamic_cast< ExpressionNode* >( cur->get_link() ) ) {
                cur->printOneLine( os, indent );
        } // for
        os << ") ";
}

void CompositeExprNode::print( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << string( indent, ' ' ) << "Application of: " << endl;
        function->print( os, indent + ParseNode::indent_by );

        os << string( indent, ' ' ) ;
        if ( arguments ) {
                os << "... on arguments: " << endl;
                arguments->printList( os, indent + ParseNode::indent_by );
        } else
                os << "... on no arguments: " << endl;
}

void CompositeExprNode::set_function( ExpressionNode *f ) {
        function = f;
}

void CompositeExprNode::set_args( ExpressionNode *args ) {
        arguments = args;
}

ExpressionNode *CompositeExprNode::get_function( void ) const {
        return function;
}

ExpressionNode *CompositeExprNode::get_args( void ) const {
        return arguments;
}

void CompositeExprNode::add_arg( ExpressionNode *arg ) {
        if ( arguments )
                arguments->set_link( arg );
        else
                set_args( arg );
}

//##############################################################################

Expression *AsmExprNode::build() const {
        return new AsmExpr( maybeBuild< Expression >( inout ), (ConstantExpr *)constraint->build(), operand->build() );
}

void AsmExprNode::print( std::ostream &os, int indent ) const {
        os << string( indent, ' ' ) << "Assembler Expression:" << endl;
        if ( inout ) {
                os << string( indent, ' ' ) << "inout: " << std::endl;
                inout->print( os, indent + 2 );
        } // if
        if ( constraint ) {
                os << string( indent, ' ' ) << "constraint: " << std::endl;
                constraint->print( os, indent + 2 );
        } // if
        if ( operand ) {
                os << string( indent, ' ' ) << "operand: " << std::endl;
                operand->print( os, indent + 2 );
        } // if
}

void AsmExprNode::printOneLine( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << "( ";
        if ( inout ) inout->printOneLine( os, indent + 2 );
        os << ", ";
        if ( constraint ) constraint->printOneLine( os, indent + 2 );
        os << ", ";
        if ( operand ) operand->printOneLine( os, indent + 2 );
        os << ") ";
}

//##############################################################################

void LabelNode::print( std::ostream &os, int indent ) const {}

void LabelNode::printOneLine( std::ostream &os, int indent ) const {}

//##############################################################################

CommaExprNode::CommaExprNode(): CompositeExprNode( new OperatorNode( OperatorNode::Comma )) {}

CommaExprNode::CommaExprNode( ExpressionNode *exp ) : CompositeExprNode( new OperatorNode( OperatorNode::Comma ), exp ) {
}

CommaExprNode::CommaExprNode( ExpressionNode *exp1, ExpressionNode *exp2) : CompositeExprNode( new OperatorNode( OperatorNode::Comma ), exp1, exp2) {
}

CommaExprNode *CommaExprNode::add_to_list( ExpressionNode *exp ) {
        add_arg( exp );

        return this;
}

CommaExprNode::CommaExprNode( const CommaExprNode &other ) : CompositeExprNode( other ) {
}

//##############################################################################

ValofExprNode::ValofExprNode( StatementNode *s ): body( s ) {}

ValofExprNode::ValofExprNode( const ValofExprNode &other ) : ExpressionNode( other ), body( maybeClone( body ) ) {
}

ValofExprNode::~ValofExprNode() {
        delete body;
}

void ValofExprNode::print( std::ostream &os, int indent ) const {
        printDesignation( os );
        os << string( indent, ' ' ) << "Valof Expression:" << std::endl;
        get_body()->print( os, indent + 4);
}

void ValofExprNode::printOneLine( std::ostream &, int indent ) const {
        assert( false );
}

Expression *ValofExprNode::build() const {
        return new UntypedValofExpr ( get_body()->build(), maybeBuild< Expression >( get_argName() ) );
}

//##############################################################################

ForCtlExprNode::ForCtlExprNode( ParseNode *init_, ExpressionNode *cond, ExpressionNode *incr ) throw ( SemanticError ) : condition( cond ), change( incr ) {
        if ( init_ == 0 )
                init = 0;
        else {
                DeclarationNode *decl;
                ExpressionNode *exp;

                if (( decl = dynamic_cast<DeclarationNode *>(init_) ) != 0)
                        init = new StatementNode( decl );
                else if (( exp = dynamic_cast<ExpressionNode *>( init_)) != 0)
                        init = new StatementNode( StatementNode::Exp, exp );
                else
                        throw SemanticError("Error in for control expression");
        }
}

ForCtlExprNode::ForCtlExprNode( const ForCtlExprNode &other )
        : ExpressionNode( other ), init( maybeClone( other.init ) ), condition( maybeClone( other.condition ) ), change( maybeClone( other.change ) ) {
}

ForCtlExprNode::~ForCtlExprNode() {
        delete init;
        delete condition;
        delete change;
}

Expression *ForCtlExprNode::build() const {
        // this shouldn't be used!
        assert( false );
        return 0;
}

void ForCtlExprNode::print( std::ostream &os, int indent ) const{
        os << string( indent,' ' ) << "For Control Expression -- :" << endl;

        os << string( indent + 2, ' ' ) << "initialization:" << endl;
        if ( init != 0 )
                init->printList( os, indent + 4 );

        os << string( indent + 2, ' ' ) << "condition: " << endl;
        if ( condition != 0 )
                condition->print( os, indent + 4 );
        os << string( indent + 2, ' ' ) << "increment: " << endl;
        if ( change != 0 )
                change->print( os, indent + 4 );
}

void ForCtlExprNode::printOneLine( std::ostream &, int indent ) const {
        assert( false );
}

//##############################################################################

TypeValueNode::TypeValueNode( DeclarationNode *decl ) : decl( decl ) {
}

TypeValueNode::TypeValueNode( const TypeValueNode &other ) : ExpressionNode( other ), decl( maybeClone( other.decl ) ) {
}

Expression *TypeValueNode::build() const {
        return new TypeExpr( decl->buildType() );
}

void TypeValueNode::print( std::ostream &os, int indent ) const {
        os << std::string( indent, ' ' ) << "Type:";
        get_decl()->print( os, indent + 2);
}

void TypeValueNode::printOneLine( std::ostream &os, int indent ) const {
        os << "Type:";
        get_decl()->print( os, indent + 2);
}

ExpressionNode *flattenCommas( ExpressionNode *list ) {
        if ( CompositeExprNode *composite = dynamic_cast< CompositeExprNode * >( list ) ) {
                OperatorNode *op;
                if ( ( op = dynamic_cast< OperatorNode * >( composite->get_function() )) && ( op->get_type() == OperatorNode::Comma ) ) {
                        if ( ExpressionNode *next = dynamic_cast< ExpressionNode * >( list->get_link() ) )
                                composite->add_arg( next );
                        return flattenCommas( composite->get_args() );
                } // if
        } // if

        if ( ExpressionNode *next = dynamic_cast< ExpressionNode * >( list->get_link() ) )
                list->set_next( flattenCommas( next ) );

        return list;
}

ExpressionNode *tupleContents( ExpressionNode *tuple ) {
        if ( CompositeExprNode *composite = dynamic_cast< CompositeExprNode * >( tuple ) ) {
                OperatorNode *op = 0;
                if ( ( op = dynamic_cast< OperatorNode * >( composite->get_function() )) && ( op->get_type() == OperatorNode::TupleC ) )
                        return composite->get_args();
        } // if
        return tuple;
}

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