//
// 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 : Fri Mar  3 21:38:34 2017
// Update Count     : 862
//

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

#include "TypeData.h"

#include "SynTree/Attribute.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::storageClassNames[] = { "extern", "static", "auto", "register", "_Thread_local", "inline", "fortran", "_Noreturn", "NoStorageClassNames" };
const char * DeclarationNode::funcSpecifierNames[] = { "inline", "fortran", "_Noreturn", "NoFunctionSpecifierNames" };
const char * DeclarationNode::typeQualifierNames[] = { "const", "restrict", "volatile", "lvalue", "_Atomic", "NoTypeQualifierNames" };
const char * DeclarationNode::basicTypeNames[] = { "void", "_Bool", "char", "int", "float", "double", "long double", "NoBasicTypeNames" };
const char * DeclarationNode::complexTypeNames[] = { "_Complex", "_Imaginary", "NoComplexTypeNames" };
const char * DeclarationNode::signednessNames[] = { "signed", "unsigned", "NoSignednessNames" };
const char * DeclarationNode::lengthNames[] = { "short", "long", "long long", "NoLengthNames" };
const char * DeclarationNode::aggregateNames[] = { "struct", "union", "context", "NoAggregateNames" };
const char * DeclarationNode::typeClassNames[] = { "otype", "dtype", "ftype", "NoTypeClassNames" };
const char * DeclarationNode::builtinTypeNames[] = { "__builtin_va_list", "NoBuiltinTypeNames" };

UniqueName DeclarationNode::anonymous( "__anonymous" );

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

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

//	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 asmStmt;
	// asmName, no delete, passed to next stage
	delete initializer;
}

DeclarationNode * DeclarationNode::clone() const {
	DeclarationNode * newnode = new DeclarationNode;
	newnode->set_next( maybeClone( get_next() ) );
	newnode->name = name ? new string( *name ) : nullptr;

	newnode->type = maybeClone( type );
	newnode->storageClass = storageClass;
	newnode->bitfieldWidth = maybeClone( bitfieldWidth );
	newnode->funcSpec = funcSpec;
	newnode->enumeratorValue.reset( maybeClone( enumeratorValue.get() ) );
	newnode->hasEllipsis = hasEllipsis;
	newnode->linkage = linkage;
	newnode->asmName = maybeClone( asmName );
	cloneAll( attributes, newnode->attributes );
	newnode->initializer = maybeClone( initializer );
	newnode->extension = extension;
	newnode->asmStmt = maybeClone( asmStmt );
	newnode->error = error;

//	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_FuncSpec( std::ostream & output, DeclarationNode::FuncSpec funcSpec ) {
	if ( funcSpec.any() ) {								// function specifiers?
		for ( unsigned int i = 0; i < DeclarationNode::NoFuncSpecifier; i += 1 ) {
			if ( funcSpec[i] ) {
				output << DeclarationNode::funcSpecifierNames[i] << ' ';
			} // if
		} // for
	} // if
} // print_FuncSpec

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::storageClassNames[storageClass] << ' ';
	print_FuncSpec( os, funcSpec );

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

	return newnode;
} // DeclarationNode::newFunction


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

DeclarationNode * DeclarationNode::newFuncSpecifier( DeclarationNode::FuncSpecifier fs ) {
	DeclarationNode * newnode = new DeclarationNode;
	newnode->funcSpec[ fs ] = true;
	return newnode;
} // DeclarationNode::newFuncSpecifier

DeclarationNode * DeclarationNode::newTypeQualifier( TypeQualifier tq ) {
	DeclarationNode * newnode = new DeclarationNode;
	newnode->type = new TypeData();
	newnode->type->typeQualifiers[ tq ] = true;
	return newnode;
} // DeclarationNode::newQualifier

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

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, bool body ) {
	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;
	newnode->type->enumeration.body = body;
	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;
}

DeclarationNode * DeclarationNode::newAttribute( string * name, ExpressionNode * expr ) {
	DeclarationNode * newnode = new DeclarationNode;
	newnode->type = nullptr;
	std::list< Expression * > exprs;
	buildList( expr, exprs );
	newnode->attributes.push_back( new Attribute( *name, exprs ) );
	delete name;
	return newnode;
}

DeclarationNode * DeclarationNode::newAsmStmt( StatementNode * stmt ) {
	DeclarationNode * newnode = new DeclarationNode;
	newnode->asmStmt = stmt;
	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 ) {
	const TypeData::TypeQualifiers &qsrc = src->typeQualifiers, &qdst = dst->typeQualifiers; // optimization

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

void DeclarationNode::checkStorageClasses( DeclarationNode * q ) {
	const FuncSpec &src = funcSpec, &dst = q->funcSpec; // optimization
	if ( (src & dst).any() ) {							// common specifier ?
		for ( unsigned int i = 0; i < NoFuncSpecifier; i += 1 ) { // find common specifier
			if ( src[i] && dst[i] ) {
				appendError( error, string( "duplicate " ) + DeclarationNode::funcSpecifierNames[i] );
			} // if
		} // for
	} // if

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

	appendError( error, q->error );
} // DeclarationNode::checkStorageClasses

DeclarationNode * DeclarationNode::copyStorageClasses( DeclarationNode * q ) {
	funcSpec = funcSpec | q->funcSpec;

	// do not overwrite an existing value with NoStorageClass
	if ( q->storageClass != NoStorageClass ) {
		assert( storageClass == NoStorageClass || storageClass == q->storageClass );
		storageClass = q->storageClass;
	} // if

	for ( Attribute *attr: reverseIterate( q->attributes ) ) {
		attributes.push_front( attr->clone() );
	} // for
	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->typeQualifiers |= src->typeQualifiers;
	} // 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

	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

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

	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->typeQualifiers |= dst->typeQualifiers;
			dst = src;
			src = nullptr;
			break;
		  case TypeData::Basic:
			dst->typeQualifiers |= src->typeQualifiers;
			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::basicTypeNames[ 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::complexTypeNames[ 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::signednessNames[ 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::lengthNames[ 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->typeQualifiers |= src->typeQualifiers;
				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.hoistType = o->type->aggregate.body;
						type->aggInst.params = maybeClone( o->type->aggregate.actuals );
					} else {
						type->aggInst.hoistType = o->type->enumeration.body;
					} // if
					type->typeQualifiers |= o->type->typeQualifiers;
				} 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::addAsmName( DeclarationNode * newname ) {
	assert( ! asmName );
	asmName = newname ? newname->asmName : nullptr;
	return this->addQualifiers( newname );
}

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;
	return this;
}

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

DeclarationNode * DeclarationNode::setBase( 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
	return this;
}

DeclarationNode * DeclarationNode::copyAttribute( DeclarationNode * a ) {
	if ( a ) {
		for ( Attribute *attr: reverseIterate( a->attributes ) ) {
			attributes.push_front( attr );
		} // for
		a->attributes.clear();
	} // if
	return this;
} // copyAttribute

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

DeclarationNode * DeclarationNode::addArray( DeclarationNode * a ) {
	if ( a ) {
		assert( a->type->kind == TypeData::Array );
		setBase( a->type );
		a->type = nullptr;
		copyAttribute( a );
		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->typeQualifiers |= type->typeQualifiers;
				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->typeQualifiers |= type->typeQualifiers;
				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( 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;

		// search for the base type by scanning off pointers and array designators
		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
			// don't hoist twice
			newType->aggInst.hoistType = false;
		} // 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 );

	for ( const DeclarationNode * cur = firstNode; cur; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) {
		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 ) {
					decl->location = cur->location;
					* out++ = decl;
				} // if
				delete extr;
			} // if

			Declaration * decl = cur->build();
			if ( decl ) {
				decl->location = cur->location;
				* out++ = decl;
			} // if
		} catch( SemanticError &e ) {
			e.set_location( cur->location );
			errors.append( e );
		} // try
	} // 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 );

	for ( const DeclarationNode * cur = firstNode; cur; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) {
		try {
			Declaration * decl = cur->build();
			if ( decl ) {
				if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
					dwt->location = cur->location;
					* out++ = dwt;
				} else if ( StructDecl * agg = dynamic_cast< StructDecl * >( decl ) ) {
					StructInstType * inst = new StructInstType( Type::Qualifiers(), agg->get_name() );
					auto obj = new ObjectDecl( "", DeclarationNode::NoStorageClass, linkage, nullptr, inst, nullptr );
					obj->location = cur->location;
					* out++ = obj;
					delete agg;
				} else if ( UnionDecl * agg = dynamic_cast< UnionDecl * >( decl ) ) {
					UnionInstType * inst = new UnionInstType( Type::Qualifiers(), agg->get_name() );
					auto obj = new ObjectDecl( "", DeclarationNode::NoStorageClass, linkage, nullptr, inst, nullptr );
					obj->location = cur->location;
					* out++ = obj;
				} // if
			} // if
		} catch( SemanticError &e ) {
			e.set_location( cur->location );
			errors.append( e );
		} // try
	} // for

	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 ) {
			e.set_location( cur->location );
			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 ( asmStmt ) {
		return new AsmDecl( safe_dynamic_cast<AsmStmt *>( asmStmt->build() ) );
	} // if

	if ( variable.tyClass != NoTypeClass ) {
		static const TypeDecl::Kind kindMap[] = { TypeDecl::Any, TypeDecl::Dtype, TypeDecl::Ftype, TypeDecl::Ttype };
		assertf( sizeof(kindMap)/sizeof(kindMap[0] == NoTypeClass-1), "DeclarationNode::build: kindMap is out of sync." );
		assertf( variable.tyClass < sizeof(kindMap)/sizeof(kindMap[0]), "Variable's tyClass is out of bounds." );
		TypeDecl * ret = new TypeDecl( *name, DeclarationNode::NoStorageClass, nullptr, kindMap[ variable.tyClass ] );
		buildList( variable.assertions, ret->get_assertions() );
		return ret;
	} // if

	if ( type ) {
		// Function specifiers can only appear on a function definition/declaration.
		//
		//    inline _Noreturn int f();			// allowed
		//    inline _Noreturn int g( int i );	// allowed
		//    inline _Noreturn int i;			// disallowed
		if ( type->kind != TypeData::Function && funcSpec.any() ) {
			throw SemanticError( "invalid function specifier for ", this );
		} // if
		return buildDecl( type, name ? *name : string( "" ), storageClass, maybeBuild< Expression >( bitfieldWidth ), funcSpec, linkage, asmName, maybeBuild< Initializer >(initializer), attributes )->set_extension( extension );
	} // if

	// SUE's cannot have function specifiers, either
	//
	//    inlne _Noreturn struct S { ... };		// disallowed
	//    inlne _Noreturn enum   E { ... };		// disallowed
	if ( funcSpec.any() ) {
		throw SemanticError( "invalid function specifier for ", this );
	} // if
	assertf( name, "ObjectDecl must a have name\n" );
	return (new ObjectDecl( *name, storageClass, linkage, maybeBuild< Expression >( bitfieldWidth ), nullptr, maybeBuild< Initializer >( initializer ) ))->set_asmName( asmName )->set_extension( extension );
}

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

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

	switch ( type->kind ) {
	  case TypeData::Enum:
	  case TypeData::Aggregate: {
		  ReferenceToType * ret = buildComAggInst( type, attributes );
		  buildList( type->aggregate.actuals, ret->get_parameters() );
		  return ret;
	  }
	  case TypeData::Symbolic: {
		  TypeInstType * ret = new TypeInstType( buildQualifiers( type ), *type->symbolic.name, false, attributes );
		  buildList( type->symbolic.actuals, ret->get_parameters() );
		  return ret;
	  }
	  default:
		Type * simpletypes = typebuild( type );
		simpletypes->get_attributes() = attributes;		// copy because member is const
		return simpletypes;
	} // switch
}

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