//
// 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 : Wed Sep 14 23:13:28 2016
// Update Count     : 502
//

#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( 0 ),
		storageClass( NoStorageClass ),
		isInline( false ),
		isNoreturn( false ),
		bitfieldWidth( 0 ),
		initializer( 0 ),
		hasEllipsis( false ),
		linkage( ::linkage ),
		extension( false ) {
	variable.tyClass = DeclarationNode::Otype;
	variable.assertions = nullptr;

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

DeclarationNode::~DeclarationNode() {
	delete attr.expr;
	delete attr.type;
	delete type;
	delete bitfieldWidth;
	delete initializer;
}

DeclarationNode *DeclarationNode::clone() const {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->type = maybeClone( type );
	newnode->name = name;
	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.assertions = maybeClone( variable.assertions );
	newnode->variable.name = variable.name;
	newnode->variable.tyClass = variable.tyClass;

	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 << "unnamed: ";
	} else {
		os << name << ": ";
	} // if

	if ( linkage != LinkageSpec::Cforall ) {
		os << LinkageSpec::toString( 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 != 0 ) {
		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( std::string *name, DeclarationNode *ret, DeclarationNode *param, StatementNode *body, bool newStyle ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->name = assign_strptr( name );

	newnode->type = new TypeData( TypeData::Function );
	newnode->type->function.params = param;
	newnode->type->function.newStyle = newStyle;
	newnode->type->function.body = body;
	typedefTable.addToEnclosingScope( newnode->name, TypedefTable::ID );

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

	if ( ret ) {
		newnode->type->base = ret->type;
		ret->type = 0;
		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;
	//switch (sc) {
	//	case Inline: newnode->isInline = true; break;
	//	case Noreturn: newnode->isNoreturn = true; break;
	//	default: newnode->storageClass = sc; break;
	//}
	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( std::string *name ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->type = new TypeData( TypeData::SymbolicInst );
	newnode->type->symbolic.name = assign_strptr( name );
	newnode->type->symbolic.isTypedef = true;
	newnode->type->symbolic.params = 0;
	return newnode;
} // DeclarationNode::newFromTypedef

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

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

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

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

DeclarationNode *DeclarationNode::newTypeParam( TypeClass tc, std::string *name ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->name = assign_strptr( name );
	newnode->type = new TypeData( TypeData::Variable );
	newnode->variable.tyClass = tc;
	newnode->variable.name = newnode->name;
	return newnode;
} // DeclarationNode::newTypeParam

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

DeclarationNode *DeclarationNode::newTraitUse( std::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 = assign_strptr( name );
	newnode->type->aggInst.params = params;
	return newnode;
} // DeclarationNode::newTraitUse

DeclarationNode *DeclarationNode::newTypeDecl( std::string *name, DeclarationNode *typeParams ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->name = assign_strptr( name );
	newnode->type = new TypeData( TypeData::Symbolic );
	newnode->type->symbolic.isTypedef = false;
	newnode->type->symbolic.params = typeParams;
	newnode->type->symbolic.name = newnode->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 == 0 || 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 = 0;
	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;
	return newnode;
} // DeclarationNode::newBuiltinType

DeclarationNode *DeclarationNode::newAttr( std::string *name, ExpressionNode *expr ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->type = new TypeData( TypeData::Attr );
	newnode->attr.name = assign_strptr( name );
	newnode->attr.expr = expr;
	return newnode;
}

DeclarationNode *DeclarationNode::newAttr( std::string *name, DeclarationNode *type ) {
	DeclarationNode *newnode = new DeclarationNode;
	newnode->type = new TypeData( TypeData::Attr );
	newnode->attr.name = assign_strptr( 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 = 0;
	} // if
	if ( dst->base ) {
		addQualifiersToType( src, dst->base );
	} else if ( dst->kind == TypeData::Function ) {
		dst->base = src;
		src = 0;
	} else {
		dst->qualifiers |= src->qualifiers;
	} // if
} // addQualifiersToType

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

	checkStorageClasses( q );
	copyStorageClasses( q );

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

	if ( ! type ) {
//		type = new TypeData;
		type = q->type;
		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 = 0;
	} // 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 = 0;
	} // if
	if ( dst->base ) {
		addTypeToType( src, dst->base );
	} else {
		switch ( dst->kind ) {
		  case TypeData::Unknown:
			src->qualifiers |= dst->qualifiers;
			dst = src;
			src = 0;
			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( std::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( std::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( std::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( std::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 = 0;
				break;
			  default:
				if ( dst->forall ) {
					dst->forall->appendList( src->forall );
				} else {
					dst->forall = src->forall;
				} // if
				src->forall = 0;
				dst->base = src;
				src = 0;
			} // 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 = 0;
			} 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 = 0;
	newtype->symbolic.isTypedef = true;
	newtype->symbolic.name = name;
	newtype->base = type;
	type = newtype;
	return this;
}

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

	return this;
}

DeclarationNode *DeclarationNode::addName( std::string *newname ) {
	name = assign_strptr( 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 == 0 );
	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 == 0 );
	type->function.oldDeclList = list;
	return this;
}

static void setBase( TypeData *&type, TypeData *newType ) {
	if ( type ) {
		TypeData *prevBase = type;
		TypeData *curBase = type->base;
		while ( curBase != 0 ) {
			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 = 0;
		delete p;
	} // if
	return this;
}

DeclarationNode *DeclarationNode::addArray( DeclarationNode *a ) {
	if ( a ) {
		assert( a->type->kind == TypeData::Array );
		setBase( type, a->type );
		a->type = 0;
		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 = 0;
		} // 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 = 0;
		} // 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
}

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

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

DeclarationNode *DeclarationNode::cloneBaseType( string *newName ) {
	DeclarationNode *newnode = new DeclarationNode;
	TypeData *srcType = type;
	while ( srcType->base ) {
		srcType = srcType->base;
	} // while
	newnode->type = maybeClone( srcType );
	if ( newnode->type->kind == TypeData::AggregateInst ) {
		// don't duplicate members
		if ( newnode->type->aggInst.aggregate->kind == TypeData::Enum ) {
			delete newnode->type->aggInst.aggregate->enumeration.constants;
			newnode->type->aggInst.aggregate->enumeration.constants = 0;
		} else {
			assert( newnode->type->aggInst.aggregate->kind == TypeData::Aggregate );
			delete newnode->type->aggInst.aggregate->aggregate.fields;
			newnode->type->aggInst.aggregate->aggregate.fields = 0;
		} // if
	} // if
	newnode->type->forall = maybeClone( type->forall );
	assert( storageClass == NoStorageClass );
	newnode->copyStorageClasses( this );
	newnode->name = assign_strptr( newName );
	return newnode;
}

DeclarationNode *DeclarationNode::cloneBaseType( DeclarationNode *o ) {
	if ( o ) {
		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 = 0;
				} else {
					assert( newType->aggInst.aggregate->kind == TypeData::Aggregate );
					delete newType->aggInst.aggregate->aggregate.fields;
					newType->aggInst.aggregate->aggregate.fields = 0;
				} // if
			} // if
			newType->forall = maybeClone( type->forall );
			if ( ! o->type ) {
				o->type = newType;
			} else {
				addTypeToType( newType, o->type );
				delete newType;
			} // if
		} // if
	} // if
	return o;
}

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

DeclarationNode *DeclarationNode::cloneType( DeclarationNode *o ) {
	if ( o ) {
		assert( storageClass == NoStorageClass );
		o->copyStorageClasses( this );
		if ( type ) {
			TypeData *newType = type->clone();
			if ( ! o->type ) {
				o->type = newType;
			} else {
				addTypeToType( newType, o->type );
				delete newType;
			} // if
		} // if
	} // if
	delete o;
	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 0;
}

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
}

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, 0, inst, 0 );
					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, 0, inst, 0 );
				} // if
			} // if
		} catch( SemanticError &e ) {
			errors.append( e );
		} // try
		cur = dynamic_cast< DeclarationNode * >( cur->get_next() );
	} // while
	if ( ! errors.isEmpty() ) {
		throw errors;
	} // if
}

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
}

Declaration *DeclarationNode::build() const {
	if ( ! error.empty() ) throw SemanticError( error + " in declaration of ", this );
	if ( type ) {
		if ( type->kind == TypeData::Variable ) {
			static const TypeDecl::Kind kindMap[] = { TypeDecl::Any, TypeDecl::Ftype, TypeDecl::Dtype };
			TypeDecl * ret = new TypeDecl( variable.name, DeclarationNode::NoStorageClass, 0, kindMap[ variable.tyClass ] );
			buildList( variable.assertions, ret->get_assertions() );
			return ret;
		} else {
			return buildDecl( type, name, storageClass, maybeBuild< Expression >( bitfieldWidth ), isInline, isNoreturn, linkage, maybeBuild< Initializer >(initializer) )->set_extension( extension );
		} // if
	} // if
	if ( ! isInline && ! isNoreturn ) {
		return (new ObjectDecl( name, storageClass, linkage, maybeBuild< Expression >( bitfieldWidth ), 0, maybeBuild< Initializer >( initializer ) ))->set_extension( extension );
	} // if
	throw SemanticError( "invalid function specifier ", this );
}

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

	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;
	  }
	  case TypeData::Attr: {
		  assert( type->kind == TypeData::Attr );
		  // assert( type->attr );
		  AttrType * ret;
		  if ( attr.expr ) {
			  ret = new AttrType( buildQualifiers( type ), attr.name, attr.expr->build() );
		  } else {
			  assert( attr.type );
			  ret = new AttrType( buildQualifiers( type ), attr.name, attr.type->buildType() );
		  } // if
		  return ret;
	  }
	  default:
		return typebuild( type );
	} // switch
}

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