source: src/Parser/DeclarationNode.cc @ 9a063c8

//
// 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.
//
// DeclarationNode.cc --
//
// Author           : Rodolfo G. Esteves
// Created On       : Sat May 16 12:34:05 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Mon Oct  3 18:03:08 2016
// Update Count     : 651
//

#include <string>
#include <list>
#include <iterator>
#include <algorithm>
#include <cassert>

#include "TypeData.h"

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

#include "TypedefTable.h"
extern TypedefTable typedefTable;

using namespace std;

// These must remain in the same order as the corresponding DeclarationNode enumerations.
const char * DeclarationNode::storageName[] = { "extern", "static", "auto", "register", "inline", "fortran", "_Noreturn", "_Thread_local", "NoStorageClass" };
const char * DeclarationNode::qualifierName[] = { "const", "restrict", "volatile", "lvalue", "_Atomic", "NoQualifier" };
const char * DeclarationNode::basicTypeName[] = { "void", "_Bool", "char", "int", "float", "double", "long double", "NoBasicType" };
const char * DeclarationNode::complexTypeName[] = { "_Complex", "_Imaginary", "NoComplexType" };
const char * DeclarationNode::signednessName[] = { "signed", "unsigned", "NoSignedness" };
const char * DeclarationNode::lengthName[] = { "short", "long", "long long", "NoLength" };
const char * DeclarationNode::aggregateName[] = { "struct", "union", "context" };
const char * DeclarationNode::typeClassName[] = { "otype", "dtype", "ftype" };
const char * DeclarationNode::builtinTypeName[] = { "__builtin_va_list" };

UniqueName DeclarationNode::anonymous( "__anonymous" );

extern LinkageSpec::Spec linkage;                                               // defined in parser.yy

DeclarationNode::DeclarationNode() :
                type( nullptr ),
                storageClass( NoStorageClass ),
                isInline( false ),
                isNoreturn( false ),
                bitfieldWidth( nullptr ),
                initializer( nullptr ),
                hasEllipsis( false ),
                linkage( ::linkage ),
                extension( false ) {

//      variable.name = nullptr;
        variable.tyClass = NoTypeClass;
        variable.assertions = nullptr;

//      attr.name = nullptr;
        attr.expr = nullptr;
        attr.type = nullptr;
}

DeclarationNode::~DeclarationNode() {
//      delete attr.name;
        delete attr.expr;
        delete attr.type;

//      delete variable.name;
        delete variable.assertions;

        delete type;
        delete bitfieldWidth;
        delete initializer;
}

DeclarationNode * DeclarationNode::clone() const {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = maybeClone( type );
        newnode->name = name ? new string( *name ) : nullptr;
        newnode->storageClass = storageClass;
        newnode->isInline = isInline;
        newnode->isNoreturn = isNoreturn;
        newnode->bitfieldWidth = maybeClone( bitfieldWidth );
        newnode->hasEllipsis = hasEllipsis;
        newnode->initializer = maybeClone( initializer );
        newnode->set_next( maybeClone( get_next() ) );
        newnode->linkage = linkage;

//      newnode->variable.name = variable.name ? new string( *variable.name ) : nullptr;
        newnode->variable.tyClass = variable.tyClass;
        newnode->variable.assertions = maybeClone( variable.assertions );

//      newnode->attr.name = attr.name ? new string( *attr.name ) : nullptr;
        newnode->attr.expr = maybeClone( attr.expr );
        newnode->attr.type = maybeClone( attr.type );
        return newnode;
} // DeclarationNode::clone

bool DeclarationNode::get_hasEllipsis() const {
        return hasEllipsis;
}

void DeclarationNode::print( std::ostream &os, int indent ) const {
        os << string( indent, ' ' );
        if ( name ) {
                os << *name << ": ";
        } else {
                os << "unnamed: ";
        } // if

        if ( linkage != LinkageSpec::Cforall ) {
                os << LinkageSpec::linkageName( linkage ) << " ";
        } // if

        if ( storageClass != NoStorageClass ) os << DeclarationNode::storageName[storageClass] << ' ';
        if ( isInline ) os << DeclarationNode::storageName[Inline] << ' ';
        if ( isNoreturn ) os << DeclarationNode::storageName[Noreturn] << ' ';
        if ( type ) {
                type->print( os, indent );
        } else {
                os << "untyped entity ";
        } // if

        if ( bitfieldWidth ) {
                os << endl << string( indent + 2, ' ' ) << "with bitfield width ";
                bitfieldWidth->printOneLine( os );
        } // if

        if ( initializer ) {
                os << endl << string( indent + 2, ' ' ) << "with initializer ";
                initializer->printOneLine( os );
                os << " maybe constructed? " << initializer->get_maybeConstructed();

        } // if

        os << endl;
}

void DeclarationNode::printList( std::ostream &os, int indent ) const {
        ParseNode::printList( os, indent );
        if ( hasEllipsis ) {
                os << string( indent, ' ' )  << "and a variable number of other arguments" << endl;
        } // if
}

DeclarationNode * DeclarationNode::newFunction( string * name, DeclarationNode * ret, DeclarationNode * param, StatementNode * body, bool newStyle ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->name = name;
        newnode->type = new TypeData( TypeData::Function );
        newnode->type->function.params = param;
        newnode->type->function.newStyle = newStyle;
        newnode->type->function.body = body;
        // ignore unnamed routine declarations: void p( int (*)(int) );
        if ( newnode->name ) {
                typedefTable.addToEnclosingScope( *newnode->name, TypedefTable::ID );
        } // if

        if ( body ) {
                newnode->type->function.hasBody = true;
        } // if

        if ( ret ) {
                newnode->type->base = ret->type;
                ret->type = nullptr;
                delete ret;
        } // if

        return newnode;
} // DeclarationNode::newFunction

DeclarationNode * DeclarationNode::newQualifier( Qualifier q ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData();
        newnode->type->qualifiers[ q ] = 1;
        return newnode;
} // DeclarationNode::newQualifier

DeclarationNode * DeclarationNode::newForall( DeclarationNode * forall ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Unknown );
        newnode->type->forall = forall;
        return newnode;
} // DeclarationNode::newForall

DeclarationNode * DeclarationNode::newStorageClass( DeclarationNode::StorageClass sc ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->storageClass = sc;
        return newnode;
} // DeclarationNode::newStorageClass

DeclarationNode * DeclarationNode::newBasicType( BasicType bt ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Basic );
        newnode->type->basictype = bt;
        return newnode;
} // DeclarationNode::newBasicType

DeclarationNode * DeclarationNode::newComplexType( ComplexType ct ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Basic );
        newnode->type->complextype = ct;
        return newnode;
} // DeclarationNode::newComplexType

DeclarationNode * DeclarationNode::newSignedNess( Signedness sn ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Basic );
        newnode->type->signedness = sn;
        return newnode;
} // DeclarationNode::newSignedNess

DeclarationNode * DeclarationNode::newLength( Length lnth ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Basic );
        newnode->type->length = lnth;
        return newnode;
} // DeclarationNode::newLength

DeclarationNode * DeclarationNode::newFromTypedef( string * name ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::SymbolicInst );
        newnode->type->symbolic.name = name;
        newnode->type->symbolic.isTypedef = true;
        newnode->type->symbolic.params = nullptr;
        return newnode;
} // DeclarationNode::newFromTypedef

DeclarationNode * DeclarationNode::newAggregate( Aggregate kind, const string * name, ExpressionNode * actuals, DeclarationNode * fields, bool body ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Aggregate );
        newnode->type->aggregate.kind = kind;
        if ( name ) {
                newnode->type->aggregate.name = name;
        } else {                                                                                        // anonymous aggregate ?
                newnode->type->aggregate.name = new string( anonymous.newName() );
        } // if
        newnode->type->aggregate.actuals = actuals;
        newnode->type->aggregate.fields = fields;
        newnode->type->aggregate.body = body;
        return newnode;
} // DeclarationNode::newAggregate

DeclarationNode * DeclarationNode::newEnum( string * name, DeclarationNode * constants ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Enum );
        if ( name ) {
                newnode->type->enumeration.name = name;
        } else {                                                                                        // anonymous aggregate ?
                newnode->type->enumeration.name = new string( anonymous.newName() );
        } // if
        newnode->type->enumeration.constants = constants;
        return newnode;
} // DeclarationNode::newEnum

DeclarationNode * DeclarationNode::newEnumConstant( string * name, ExpressionNode * constant ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->name = name;
        newnode->enumeratorValue.reset( constant );
        typedefTable.addToEnclosingScope( *newnode->name, TypedefTable::ID );
        return newnode;
} // DeclarationNode::newEnumConstant

DeclarationNode * DeclarationNode::newName( string * name ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->name = name;
        return newnode;
} // DeclarationNode::newName

DeclarationNode * DeclarationNode::newFromTypeGen( string * name, ExpressionNode * params ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::SymbolicInst );
        newnode->type->symbolic.name = name;
        newnode->type->symbolic.isTypedef = false;
        newnode->type->symbolic.actuals = params;
        return newnode;
} // DeclarationNode::newFromTypeGen

DeclarationNode * DeclarationNode::newTypeParam( TypeClass tc, string * name ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = nullptr;
        assert( ! newnode->name );
//      newnode->variable.name = name;
        newnode->name = name;
        newnode->variable.tyClass = tc;
        newnode->variable.assertions = nullptr;
        return newnode;
} // DeclarationNode::newTypeParam

DeclarationNode * DeclarationNode::newTrait( const string * name, DeclarationNode * params, DeclarationNode * asserts ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Aggregate );
        newnode->type->aggregate.name = name;
        newnode->type->aggregate.kind = Trait;
        newnode->type->aggregate.params = params;
        newnode->type->aggregate.fields = asserts;
        return newnode;
} // DeclarationNode::newTrait

DeclarationNode * DeclarationNode::newTraitUse( const string * name, ExpressionNode * params ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::AggregateInst );
        newnode->type->aggInst.aggregate = new TypeData( TypeData::Aggregate );
        newnode->type->aggInst.aggregate->aggregate.kind = Trait;
        newnode->type->aggInst.aggregate->aggregate.name = name;
        newnode->type->aggInst.params = params;
        return newnode;
} // DeclarationNode::newTraitUse

DeclarationNode * DeclarationNode::newTypeDecl( string * name, DeclarationNode * typeParams ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Symbolic );
        newnode->type->symbolic.isTypedef = false;
        newnode->type->symbolic.params = typeParams;
        newnode->type->symbolic.name = name;
        return newnode;
} // DeclarationNode::newTypeDecl

DeclarationNode * DeclarationNode::newPointer( DeclarationNode * qualifiers ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Pointer );
        return newnode->addQualifiers( qualifiers );
} // DeclarationNode::newPointer

DeclarationNode * DeclarationNode::newArray( ExpressionNode * size, DeclarationNode * qualifiers, bool isStatic ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Array );
        newnode->type->array.dimension = size;
        newnode->type->array.isStatic = isStatic;
        if ( newnode->type->array.dimension == nullptr || newnode->type->array.dimension->isExpressionType<ConstantExpr * >() ) {
                newnode->type->array.isVarLen = false;
        } else {
                newnode->type->array.isVarLen = true;
        } // if
        return newnode->addQualifiers( qualifiers );
} // DeclarationNode::newArray

DeclarationNode * DeclarationNode::newVarArray( DeclarationNode * qualifiers ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Array );
        newnode->type->array.dimension = nullptr;
        newnode->type->array.isStatic = false;
        newnode->type->array.isVarLen = true;
        return newnode->addQualifiers( qualifiers );
}

DeclarationNode * DeclarationNode::newBitfield( ExpressionNode * size ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->bitfieldWidth = size;
        return newnode;
}

DeclarationNode * DeclarationNode::newTuple( DeclarationNode * members ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Tuple );
        newnode->type->tuple = members;
        return newnode;
}

DeclarationNode * DeclarationNode::newTypeof( ExpressionNode * expr ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Typeof );
        newnode->type->typeexpr = expr;
        return newnode;
}

DeclarationNode * DeclarationNode::newBuiltinType( BuiltinType bt ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Builtin );
        newnode->builtin = bt;
        newnode->type->builtintype = newnode->builtin;
        return newnode;
} // DeclarationNode::newBuiltinType

DeclarationNode * DeclarationNode::newAttr( string * name, ExpressionNode * expr ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = nullptr;
//      newnode->attr.name = name;
        newnode->name = name;
        newnode->attr.expr = expr;
        return newnode;
}

DeclarationNode * DeclarationNode::newAttr( string * name, DeclarationNode * type ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = nullptr;
//      newnode->attr.name = name;
        newnode->name = name;
        newnode->attr.type = type;
        return newnode;
}

void appendError( string & dst, const string & src ) {
        if ( src.empty() ) return;
        if ( dst.empty() ) { dst = src; return; }
        dst += ", " + src;
} // appendError

void DeclarationNode::checkQualifiers( const TypeData * src, const TypeData * dst ) {
        TypeData::Qualifiers qsrc = src->qualifiers, qdst = dst->qualifiers; // optimization

        if ( (qsrc & qdst).any() ) {                                            // common qualifier ?
                for ( int i = 0; i < NoQualifier; i += 1 ) {    // find common qualifiers
                        if ( qsrc[i] && qdst[i] ) {
                                appendError( error, string( "duplicate " ) + DeclarationNode::qualifierName[i] );
                        } // if
                } // for
        } // if
} // DeclarationNode::checkQualifiers

void DeclarationNode::checkStorageClasses( DeclarationNode * q ) {
        if ( storageClass != NoStorageClass && q->storageClass != NoStorageClass ) {
                if ( storageClass == q->storageClass ) {                // duplicate qualifier
                        appendError( error, string( "duplicate " ) + storageName[ storageClass ] );
                } else {                                                                                // only one storage class
                        appendError( error, string( "conflicting " ) + storageName[ storageClass ] + " & " + storageName[ q->storageClass ] );
                        q->storageClass = storageClass;                         // FIX ERROR, prevent assertions from triggering
                } // if
        } // if
        appendError( error, q->error );
} // DeclarationNode::copyStorageClasses

DeclarationNode * DeclarationNode::copyStorageClasses( DeclarationNode * q ) {
        isInline = isInline || q->isInline;
        isNoreturn = isNoreturn || q->isNoreturn;
        // do not overwrite an existing value with NoStorageClass
        if ( q->storageClass != NoStorageClass ) {
                assert( storageClass == NoStorageClass || storageClass == q->storageClass );
                storageClass = q->storageClass;
        } // if
        return this;
} // DeclarationNode::copyStorageClasses

static void addQualifiersToType( TypeData *&src, TypeData * dst ) {
        if ( src->forall && dst->kind == TypeData::Function ) {
                if ( dst->forall ) {
                        dst->forall->appendList( src->forall );
                } else {
                        dst->forall = src->forall;
                } // if
                src->forall = nullptr;
        } // if
        if ( dst->base ) {
                addQualifiersToType( src, dst->base );
        } else if ( dst->kind == TypeData::Function ) {
                dst->base = src;
                src = nullptr;
        } else {
                dst->qualifiers |= src->qualifiers;
        } // if
} // addQualifiersToType

DeclarationNode * DeclarationNode::addQualifiers( DeclarationNode * q ) {
        if ( ! q ) { delete q; return this; }

        checkStorageClasses( q );
        copyStorageClasses( q );

        if ( ! q->type ) {
                delete q;
                return this;
        } // if

        if ( ! type ) {
                type = q->type;                                                                 // reuse this structure
                q->type = nullptr;
                delete q;
                return this;
        } // if

        checkQualifiers( q->type, type );
        addQualifiersToType( q->type, type );

        if ( q->type->forall ) {
                if ( type->forall ) {
                        type->forall->appendList( q->type->forall );
                } else {
                        if ( type->kind == TypeData::Aggregate ) {
                                type->aggregate.params = q->type->forall;
                                // change implicit typedef from TYPEDEFname to TYPEGENname
                                typedefTable.changeKind( *type->aggregate.name, TypedefTable::TG );
                        } else {
                                type->forall = q->type->forall;
                        } // if
                } // if
                q->type->forall = nullptr;
        } // if
        delete q;
        return this;
} // addQualifiers

static void addTypeToType( TypeData *&src, TypeData *&dst ) {
        if ( src->forall && dst->kind == TypeData::Function ) {
                if ( dst->forall ) {
                        dst->forall->appendList( src->forall );
                } else {
                        dst->forall = src->forall;
                } // if
                src->forall = nullptr;
        } // if
        if ( dst->base ) {
                addTypeToType( src, dst->base );
        } else {
                switch ( dst->kind ) {
                  case TypeData::Unknown:
                        src->qualifiers |= dst->qualifiers;
                        dst = src;
                        src = nullptr;
                        break;
                  case TypeData::Basic:
                        dst->qualifiers |= src->qualifiers;
                        if ( src->kind != TypeData::Unknown ) {
                                assert( src->kind == TypeData::Basic );

                                if ( dst->basictype == DeclarationNode::NoBasicType ) {
                                        dst->basictype = src->basictype;
                                } else if ( src->basictype != DeclarationNode::NoBasicType )
                                        throw SemanticError( string( "conflicting type specifier " ) + DeclarationNode::basicTypeName[ src->basictype ] + " in type: ", src );

                                if ( dst->complextype == DeclarationNode::NoComplexType ) {
                                        dst->complextype = src->complextype;
                                } else if ( src->complextype != DeclarationNode::NoComplexType )
                                        throw SemanticError( string( "conflicting type specifier " ) + DeclarationNode::complexTypeName[ src->complextype ] + " in type: ", src );

                                if ( dst->signedness == DeclarationNode::NoSignedness ) {
                                        dst->signedness = src->signedness;
                                } else if ( src->signedness != DeclarationNode::NoSignedness )
                                        throw SemanticError( string( "conflicting type specifier " ) + DeclarationNode::signednessName[ src->signedness ] + " in type: ", src );

                                if ( dst->length == DeclarationNode::NoLength ) {
                                        dst->length = src->length;
                                } else if ( dst->length == DeclarationNode::Long && src->length == DeclarationNode::Long ) {
                                        dst->length = DeclarationNode::LongLong;
                                } else if ( src->length != DeclarationNode::NoLength )
                                        throw SemanticError( string( "conflicting type specifier " ) + DeclarationNode::lengthName[ src->length ] + " in type: ", src );
                        } // if
                        break;
                  default:
                        switch ( src->kind ) {
                          case TypeData::Aggregate:
                          case TypeData::Enum:
                                dst->base = new TypeData( TypeData::AggregateInst );
                                dst->base->aggInst.aggregate = src;
                                if ( src->kind == TypeData::Aggregate ) {
                                        dst->base->aggInst.params = maybeClone( src->aggregate.actuals );
                                } // if
                                dst->base->qualifiers |= src->qualifiers;
                                src = nullptr;
                                break;
                          default:
                                if ( dst->forall ) {
                                        dst->forall->appendList( src->forall );
                                } else {
                                        dst->forall = src->forall;
                                } // if
                                src->forall = nullptr;
                                dst->base = src;
                                src = nullptr;
                        } // switch
                } // switch
        } // if
}

DeclarationNode * DeclarationNode::addType( DeclarationNode * o ) {
        if ( o ) {
                checkStorageClasses( o );
                copyStorageClasses( o );
                if ( o->type ) {
                        if ( ! type ) {
                                if ( o->type->kind == TypeData::Aggregate || o->type->kind == TypeData::Enum ) {
                                        type = new TypeData( TypeData::AggregateInst );
                                        type->aggInst.aggregate = o->type;
                                        if ( o->type->kind == TypeData::Aggregate ) {
                                                type->aggInst.params = maybeClone( o->type->aggregate.actuals );
                                        } // if
                                        type->qualifiers |= o->type->qualifiers;
                                } else {
                                        type = o->type;
                                } // if
                                o->type = nullptr;
                        } else {
                                addTypeToType( o->type, type );
                        } // if
                } // if
                if ( o->bitfieldWidth ) {
                        bitfieldWidth = o->bitfieldWidth;
                } // if

                // there may be typedefs chained onto the type
                if ( o->get_next() ) {
                        set_last( o->get_next()->clone() );
                } // if
        } // if
        delete o;
        return this;
}

DeclarationNode * DeclarationNode::addTypedef() {
        TypeData * newtype = new TypeData( TypeData::Symbolic );
        newtype->symbolic.params = nullptr;
        newtype->symbolic.isTypedef = true;
        newtype->symbolic.name = name ? new string( *name ) : nullptr;
        newtype->base = type;
        type = newtype;
        return this;
}

DeclarationNode * DeclarationNode::addAssertions( DeclarationNode * assertions ) {
        if ( variable.tyClass != NoTypeClass ) {
                if ( variable.assertions ) {
                        variable.assertions->appendList( assertions );
                } else {
                        variable.assertions = assertions;
                } // if
                return this;
        } // if

        assert( type );
        switch ( type->kind ) {
          case TypeData::Symbolic:
                if ( type->symbolic.assertions ) {
                        type->symbolic.assertions->appendList( assertions );
                } else {
                        type->symbolic.assertions = assertions;
                } // if
                break;
          default:
                assert( false );
        } // switch

        return this;
}

DeclarationNode * DeclarationNode::addName( string * newname ) {
        assert( ! name );
        name = newname;
        return this;
}

DeclarationNode * DeclarationNode::addBitfield( ExpressionNode * size ) {
        bitfieldWidth = size;
        return this;
}

DeclarationNode * DeclarationNode::addVarArgs() {
        assert( type );
        hasEllipsis = true;
        return this;
}

DeclarationNode * DeclarationNode::addFunctionBody( StatementNode * body ) {
        assert( type );
        assert( type->kind == TypeData::Function );
        assert( ! type->function.body );
        type->function.body = body;
        type->function.hasBody = true;
        return this;
}

DeclarationNode * DeclarationNode::addOldDeclList( DeclarationNode * list ) {
        assert( type );
        assert( type->kind == TypeData::Function );
        assert( ! type->function.oldDeclList );
        type->function.oldDeclList = list;
        return this;
}

static void setBase( TypeData *&type, TypeData * newType ) {
        if ( type ) {
                TypeData * prevBase = type;
                TypeData * curBase = type->base;
                while ( curBase != nullptr ) {
                        prevBase = curBase;
                        curBase = curBase->base;
                } // while
                prevBase->base = newType;
        } else {
                type = newType;
        } // if
}

DeclarationNode * DeclarationNode::addPointer( DeclarationNode * p ) {
        if ( p ) {
                assert( p->type->kind == TypeData::Pointer );
                setBase( type, p->type );
                p->type = nullptr;
                delete p;
        } // if
        return this;
}

DeclarationNode * DeclarationNode::addArray( DeclarationNode * a ) {
        if ( a ) {
                assert( a->type->kind == TypeData::Array );
                setBase( type, a->type );
                a->type = nullptr;
                delete a;
        } // if
        return this;
}

DeclarationNode * DeclarationNode::addNewPointer( DeclarationNode * p ) {
        if ( p ) {
                assert( p->type->kind == TypeData::Pointer );
                if ( type ) {
                        switch ( type->kind ) {
                          case TypeData::Aggregate:
                          case TypeData::Enum:
                                p->type->base = new TypeData( TypeData::AggregateInst );
                                p->type->base->aggInst.aggregate = type;
                                if ( type->kind == TypeData::Aggregate ) {
                                        p->type->base->aggInst.params = maybeClone( type->aggregate.actuals );
                                } // if
                                p->type->base->qualifiers |= type->qualifiers;
                                break;

                          default:
                                p->type->base = type;
                        } // switch
                        type = nullptr;
                } // if
                delete this;
                return p;
        } else {
                return this;
        } // if
}

static TypeData * findLast( TypeData * a ) {
        assert( a );
        TypeData * cur = a;
        while ( cur->base ) {
                cur = cur->base;
        } // while
        return cur;
}

DeclarationNode * DeclarationNode::addNewArray( DeclarationNode * a ) {
        if ( a ) {
                assert( a->type->kind == TypeData::Array );
                TypeData * lastArray = findLast( a->type );
                if ( type ) {
                        switch ( type->kind ) {
                          case TypeData::Aggregate:
                          case TypeData::Enum:
                                lastArray->base = new TypeData( TypeData::AggregateInst );
                                lastArray->base->aggInst.aggregate = type;
                                if ( type->kind == TypeData::Aggregate ) {
                                        lastArray->base->aggInst.params = maybeClone( type->aggregate.actuals );
                                } // if
                                lastArray->base->qualifiers |= type->qualifiers;
                                break;
                          default:
                                lastArray->base = type;
                        } // switch
                        type = nullptr;
                } // if
                delete this;
                return a;
        } else {
                return this;
        } // if
}

DeclarationNode * DeclarationNode::addParamList( DeclarationNode * params ) {
        TypeData * ftype = new TypeData( TypeData::Function );
        ftype->function.params = params;
        setBase( type, ftype );
        return this;
}

static TypeData * addIdListToType( TypeData * type, DeclarationNode * ids ) {
        if ( type ) {
                if ( type->kind != TypeData::Function ) {
                        type->base = addIdListToType( type->base, ids );
                } else {
                        type->function.idList = ids;
                } // if
                return type;
        } else {
                TypeData * newtype = new TypeData( TypeData::Function );
                newtype->function.idList = ids;
                return newtype;
        } // if
} // addIdListToType

DeclarationNode * DeclarationNode::addIdList( DeclarationNode * ids ) {
        type = addIdListToType( type, ids );
        return this;
}

DeclarationNode * DeclarationNode::addInitializer( InitializerNode * init ) {
        initializer = init;
        return this;
}

DeclarationNode * DeclarationNode::cloneType( string * newName ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = maybeClone( type );
        assert( storageClass == NoStorageClass );
        newnode->copyStorageClasses( this );
        assert( newName );
        newnode->name = newName;
        return newnode;
}

DeclarationNode * DeclarationNode::cloneBaseType( DeclarationNode * o ) {
        if ( ! o ) return nullptr;

        o->copyStorageClasses( this );
        if ( type ) {
                TypeData * srcType = type;

                while ( srcType->base ) {
                        srcType = srcType->base;
                } // while

                TypeData * newType = srcType->clone();
                if ( newType->kind == TypeData::AggregateInst ) {
                        // don't duplicate members
                        if ( newType->aggInst.aggregate->kind == TypeData::Enum ) {
                                delete newType->aggInst.aggregate->enumeration.constants;
                                newType->aggInst.aggregate->enumeration.constants = nullptr;
                        } else {
                                assert( newType->aggInst.aggregate->kind == TypeData::Aggregate );
                                delete newType->aggInst.aggregate->aggregate.fields;
                                newType->aggInst.aggregate->aggregate.fields = nullptr;
                        } // if
                } // if

                newType->forall = maybeClone( type->forall );
                if ( ! o->type ) {
                        o->type = newType;
                } else {
                        addTypeToType( newType, o->type );
                        delete newType;
                } // if
        } // if
        return o;
}

DeclarationNode * DeclarationNode::extractAggregate() const {
        if ( type ) {
                TypeData * ret = typeextractAggregate( type );
                if ( ret ) {
                        DeclarationNode * newnode = new DeclarationNode;
                        newnode->type = ret;
                        return newnode;
                } // if
        } // if
        return nullptr;
}

void buildList( const DeclarationNode * firstNode, std::list< Declaration * > &outputList ) {
        SemanticError errors;
        std::back_insert_iterator< std::list< Declaration * > > out( outputList );
        const DeclarationNode * cur = firstNode;

        while ( cur ) {
                try {
                        if ( DeclarationNode * extr = cur->extractAggregate() ) {
                                // handle the case where a structure declaration is contained within an object or type declaration
                                Declaration * decl = extr->build();
                                if ( decl ) {
                                        * out++ = decl;
                                } // if
                                delete extr;
                        } // if

                        Declaration * decl = cur->build();
                        if ( decl ) {
                                * out++ = decl;
                        } // if
                } catch( SemanticError &e ) {
                        errors.append( e );
                } // try
                cur = dynamic_cast< DeclarationNode * >( cur->get_next() );
        } // while

        if ( ! errors.isEmpty() ) {
                throw errors;
        } // if
} // buildList

void buildList( const DeclarationNode * firstNode, std::list< DeclarationWithType * > &outputList ) {
        SemanticError errors;
        std::back_insert_iterator< std::list< DeclarationWithType * > > out( outputList );
        const DeclarationNode * cur = firstNode;
        while ( cur ) {
                try {
                        Declaration * decl = cur->build();
                        if ( decl ) {
                                if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
                                        * out++ = dwt;
                                } else if ( StructDecl * agg = dynamic_cast< StructDecl * >( decl ) ) {
                                        StructInstType * inst = new StructInstType( Type::Qualifiers(), agg->get_name() );
                                        * out++ = new ObjectDecl( "", DeclarationNode::NoStorageClass, linkage, nullptr, inst, nullptr );
                                        delete agg;
                                } else if ( UnionDecl * agg = dynamic_cast< UnionDecl * >( decl ) ) {
                                        UnionInstType * inst = new UnionInstType( Type::Qualifiers(), agg->get_name() );
                                        * out++ = new ObjectDecl( "", DeclarationNode::NoStorageClass, linkage, nullptr, inst, nullptr );
                                } // if
                        } // if
                } catch( SemanticError &e ) {
                        errors.append( e );
                } // try
                cur = dynamic_cast< DeclarationNode * >( cur->get_next() );
        } // while
        if ( ! errors.isEmpty() ) {
                throw errors;
        } // if
} // buildList

void buildTypeList( const DeclarationNode * firstNode, std::list< Type * > &outputList ) {
        SemanticError errors;
        std::back_insert_iterator< std::list< Type * > > out( outputList );
        const DeclarationNode * cur = firstNode;

        while ( cur ) {
                try {
                        * out++ = cur->buildType();
                } catch( SemanticError &e ) {
                        errors.append( e );
                } // try
                cur = dynamic_cast< DeclarationNode * >( cur->get_next() );
        } // while

        if ( ! errors.isEmpty() ) {
                throw errors;
        } // if
} // buildTypeList

Declaration * DeclarationNode::build() const {
        if ( ! error.empty() ) throw SemanticError( error + " in declaration of ", this );

//      if ( variable.name ) {
        if ( variable.tyClass != NoTypeClass ) {
                static const TypeDecl::Kind kindMap[] = { TypeDecl::Any, TypeDecl::Ftype, TypeDecl::Dtype };
//              TypeDecl * ret = new TypeDecl( *variable.name, DeclarationNode::NoStorageClass, nullptr, kindMap[ variable.tyClass ] );
                TypeDecl * ret = new TypeDecl( *name, DeclarationNode::NoStorageClass, nullptr, kindMap[ variable.tyClass ] );
                buildList( variable.assertions, ret->get_assertions() );
                return ret;
        } // if

        if ( type ) {
                return buildDecl( type, name ? *name : string( "" ), storageClass, maybeBuild< Expression >( bitfieldWidth ), isInline, isNoreturn, linkage, maybeBuild< Initializer >(initializer) )->set_extension( extension );
        } // if

        if ( ! isInline && ! isNoreturn ) {
                assertf( name, "ObjectDecl are assumed to have names\n" );
                return (new ObjectDecl( *name, storageClass, linkage, maybeBuild< Expression >( bitfieldWidth ), nullptr, maybeBuild< Initializer >( initializer ) ))->set_extension( extension );
        } // if

        throw SemanticError( "invalid function specifier ", this );
}

Type * DeclarationNode::buildType() const {
        assert( type );

        if ( attr.expr ) {
//              return new AttrType( buildQualifiers( type ), *attr.name, attr.expr->build() );
                return new AttrType( buildQualifiers( type ), *name, attr.expr->build() );
        } else if ( attr.type ) {
//              return new AttrType( buildQualifiers( type ), *attr.name, attr.type->buildType() );
                return new AttrType( buildQualifiers( type ), *name, attr.type->buildType() );
        } // if

        switch ( type->kind ) {
          case TypeData::Enum:
                return new EnumInstType( buildQualifiers( type ), *type->enumeration.name );
          case TypeData::Aggregate: {
                  ReferenceToType * ret;
                  switch ( type->aggregate.kind ) {
                        case DeclarationNode::Struct:
                          ret = new StructInstType( buildQualifiers( type ), *type->aggregate.name );
                          break;
                        case DeclarationNode::Union:
                          ret = new UnionInstType( buildQualifiers( type ), *type->aggregate.name );
                          break;
                        case DeclarationNode::Trait:
                          ret = new TraitInstType( buildQualifiers( type ), *type->aggregate.name );
                          break;
                        default:
                          assert( false );
                  } // switch
                  buildList( type->aggregate.actuals, ret->get_parameters() );
                  return ret;
          }
          case TypeData::Symbolic: {
                  TypeInstType * ret = new TypeInstType( buildQualifiers( type ), *type->symbolic.name, false );
                  buildList( type->symbolic.actuals, ret->get_parameters() );
                  return ret;
          }
          default:
                return typebuild( type );
        } // switch
}

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