source: src/Parser/DeclarationNode.cc@ fa2c005

//
// 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 : Andrew Beach
// Last Modified On : Thr Apr 20 11:46:00 2023
// Update Count     : 1393
//

#include "DeclarationNode.h"

#include <cassert>                 // for assert, assertf, strict_dynamic_cast
#include <iterator>                // for back_insert_iterator
#include <list>                    // for list
#include <memory>                  // for unique_ptr
#include <ostream>                 // for operator<<, ostream, basic_ostream
#include <string>                  // for string, operator+, allocator, char...

#include "AST/Attribute.hpp"       // for Attribute
#include "AST/Copy.hpp"            // for shallowCopy
#include "AST/Decl.hpp"            // for Decl
#include "AST/Expr.hpp"            // for Expr
#include "AST/Print.hpp"           // for print
#include "AST/Stmt.hpp"            // for AsmStmt, DirectiveStmt
#include "AST/StorageClasses.hpp"  // for Storage::Class
#include "AST/Type.hpp"            // for Type
#include "Common/CodeLocation.h"   // for CodeLocation
#include "Common/Iterate.hpp"      // for reverseIterate
#include "Common/SemanticError.h"  // for SemanticError
#include "Common/UniqueName.h"     // for UniqueName
#include "Common/utility.h"        // for maybeClone
#include "Parser/ExpressionNode.h" // for ExpressionNode
#include "Parser/InitializerNode.h"// for InitializerNode
#include "Parser/StatementNode.h"  // for StatementNode
#include "TypeData.h"              // for TypeData, TypeData::Aggregate_t
#include "TypedefTable.h"          // for TypedefTable

class Initializer;

extern TypedefTable typedefTable;

using namespace std;

// These must harmonize with the corresponding DeclarationNode enumerations.
const char * DeclarationNode::basicTypeNames[] = {
        "void", "_Bool", "char", "int", "int128",
        "float", "double", "long double", "float80", "float128",
        "_float16", "_float32", "_float32x", "_float64", "_float64x", "_float128", "_float128x", "NoBasicTypeNames"
};
const char * DeclarationNode::complexTypeNames[] = {
        "_Complex", "NoComplexTypeNames", "_Imaginary"
}; // Imaginary unsupported => parse, but make invisible and print error message
const char * DeclarationNode::signednessNames[] = {
        "signed", "unsigned", "NoSignednessNames"
};
const char * DeclarationNode::lengthNames[] = {
        "short", "long", "long long", "NoLengthNames"
};
const char * DeclarationNode::builtinTypeNames[] = {
        "__builtin_va_list", "__auto_type", "zero_t", "one_t", "NoBuiltinTypeNames"
};

UniqueName DeclarationNode::anonymous( "__anonymous" );

extern ast::Linkage::Spec linkage;                                              // defined in parser.yy

DeclarationNode::DeclarationNode() :
        linkage( ::linkage ) {

//      variable.name = nullptr;
        variable.tyClass = ast::TypeDecl::NUMBER_OF_KINDS;
        variable.assertions = nullptr;
        variable.initializer = nullptr;

        assert.condition = nullptr;
        assert.message = nullptr;
}

DeclarationNode::~DeclarationNode() {
//      delete variable.name;
        delete variable.assertions;
        delete variable.initializer;

//      delete type;
        delete bitfieldWidth;

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

        delete assert.condition;
        delete assert.message;
}

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

        newnode->builtin = NoBuiltinType;
        newnode->type = maybeClone( type );
        newnode->inLine = inLine;
        newnode->storageClasses = storageClasses;
        newnode->funcSpecs = funcSpecs;
        newnode->bitfieldWidth = maybeClone( bitfieldWidth );
        newnode->enumeratorValue.reset( maybeClone( enumeratorValue.get() ) );
        newnode->hasEllipsis = hasEllipsis;
        newnode->linkage = linkage;
        newnode->asmName = maybeCopy( asmName );
        newnode->attributes = 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->variable.initializer = maybeClone( variable.initializer );

        newnode->assert.condition = maybeClone( assert.condition );
        newnode->assert.message = maybeCopy( assert.message );
        return newnode;
} // DeclarationNode::clone

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

        if ( linkage != ast::Linkage::Cforall ) {
                os << ast::Linkage::name( linkage ) << " ";
        } // if

        ast::print( os, storageClasses );
        ast::print( os, funcSpecs );

        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

        if ( ! attributes.empty() ) {
                os << string( indent + 2, ' ' ) << "with attributes " << endl;
                for ( ast::ptr<ast::Attribute> const & attr : reverseIterate( attributes ) ) {
                        os << string( indent + 4, ' ' ) << attr->name.c_str() << endl;
                } // for
        } // 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::newStorageClass( ast::Storage::Classes sc ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->storageClasses = sc;
        return newnode;
} // DeclarationNode::newStorageClass

DeclarationNode * DeclarationNode::newFuncSpecifier( ast::Function::Specs fs ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->funcSpecs = fs;
        return newnode;
} // DeclarationNode::newFuncSpecifier

DeclarationNode * DeclarationNode::newTypeQualifier( ast::CV::Qualifiers tq ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData();
        newnode->type->qualifiers = tq;
        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::newFromGlobalScope() {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::GlobalScope );
        return newnode;
}

DeclarationNode * DeclarationNode::newQualifiedType( DeclarationNode * parent, DeclarationNode * child) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Qualified );
        newnode->type->qualified.parent = parent->type;
        newnode->type->qualified.child = child->type;
        parent->type = nullptr;
        child->type = nullptr;
        delete parent;
        delete child;
        return newnode;
}

DeclarationNode * DeclarationNode::newAggregate( ast::AggregateDecl::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;
        newnode->type->aggregate.anon = name == nullptr;
        newnode->type->aggregate.name = newnode->type->aggregate.anon ? new string( DeclarationNode::anonymous.newName() ) : name;
        newnode->type->aggregate.actuals = actuals;
        newnode->type->aggregate.fields = fields;
        newnode->type->aggregate.body = body;
        newnode->type->aggregate.tagged = false;
        newnode->type->aggregate.parent = nullptr;
        return newnode;
} // DeclarationNode::newAggregate

DeclarationNode * DeclarationNode::newEnum( const string * name, DeclarationNode * constants, bool body, bool typed, DeclarationNode * base, EnumHiding hiding ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Enum );
        newnode->type->enumeration.anon = name == nullptr;
        newnode->type->enumeration.name = newnode->type->enumeration.anon ? new string( DeclarationNode::anonymous.newName() ) : name;
        newnode->type->enumeration.constants = constants;
        newnode->type->enumeration.body = body;
        newnode->type->enumeration.typed = typed;
        newnode->type->enumeration.hiding = hiding;
        if ( base && base->type )  {
                newnode->type->base = base->type;
        } // if

        return newnode;
} // DeclarationNode::newEnum

DeclarationNode * DeclarationNode::newAdt( const string * name, DeclarationNode * constructors ) {
        assert( name );
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Adt );
        newnode->type->adt.name = name;
        newnode->type->adt.data_constructors = constructors;
        return newnode;
} // DeclarationNode::newAdt


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

DeclarationNode * DeclarationNode::newEnumConstant( const string * name, ExpressionNode * constant ) {
        DeclarationNode * newnode = newName( name );
        newnode->enumeratorValue.reset( constant );
        return newnode;
} // DeclarationNode::newEnumConstant

DeclarationNode * DeclarationNode::newEnumValueGeneric( const string * name, InitializerNode * init ) {
        if ( init ) {
                if ( init->get_expression() ) {
                        return newEnumConstant( name, init->get_expression() );
                } else {
                        DeclarationNode * newnode = newName( name );
                        newnode->initializer = init;
                        return newnode;
                } // if
        } else {
                return newName( name );
        } // if
} // DeclarationNode::newEnumValueGeneric

DeclarationNode * DeclarationNode::newDataConstructor( const string * name ) {
        DeclarationNode * newnode = newName(name);
        return newnode;
}

DeclarationNode * DeclarationNode::newEnumInLine( const string name ) {
        DeclarationNode * newnode = newName( new std::string(name) );
        newnode->enumInLine = true;
        return newnode;
}

DeclarationNode * DeclarationNode::newFromTypedef( const 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::newFromTypeGen( const 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( ast::TypeDecl::Kind tc, const string * name ) {
        DeclarationNode * newnode = newName( name );
        newnode->type = nullptr;
        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 = ast::AggregateDecl::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 = ast::AggregateDecl::Trait;
        newnode->type->aggInst.aggregate->aggregate.name = name;
        newnode->type->aggInst.params = params;
        return newnode;
} // DeclarationNode::newTraitUse

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

DeclarationNode * DeclarationNode::newPointer( DeclarationNode * qualifiers, OperKinds kind ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( kind == OperKinds::PointTo ? TypeData::Pointer : TypeData::Reference );
        if ( kind == OperKinds::And ) {
                // T && is parsed as 'And' operator rather than two references => add a second reference type
                TypeData * td = new TypeData( TypeData::Reference );
                td->base = newnode->type;
                newnode->type = td;
        }
        if ( qualifiers ) {
                return newnode->addQualifiers( qualifiers );
        } else {
                return newnode;
        } // if
} // 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<ast::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, bool basetypeof ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( basetypeof ? TypeData::Basetypeof : TypeData::Typeof );
        newnode->type->typeexpr = expr;
        return newnode;
}

DeclarationNode * DeclarationNode::newVtableType( DeclarationNode * decl ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = new TypeData( TypeData::Vtable );
        newnode->setBase( decl->type );
        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::newFunction( const string * name, DeclarationNode * ret, DeclarationNode * param, StatementNode * body ) {
        DeclarationNode * newnode = newName( name );
        newnode->type = new TypeData( TypeData::Function );
        newnode->type->function.params = param;
        newnode->type->function.body = body;

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

        return newnode;
} // DeclarationNode::newFunction

DeclarationNode * DeclarationNode::newAttribute( const string * name, ExpressionNode * expr ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->type = nullptr;
        std::vector<ast::ptr<ast::Expr>> exprs;
        buildList( expr, exprs );
        newnode->attributes.push_back(
                new ast::Attribute( *name, std::move( exprs ) ) );
        delete name;
        return newnode;
}

DeclarationNode * DeclarationNode::newDirectiveStmt( StatementNode * stmt ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->directiveStmt = stmt;
        return newnode;
}

DeclarationNode * DeclarationNode::newAsmStmt( StatementNode * stmt ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->asmStmt = stmt;
        return newnode;
}

DeclarationNode * DeclarationNode::newStaticAssert( ExpressionNode * condition, ast::Expr * message ) {
        DeclarationNode * newnode = new DeclarationNode;
        newnode->assert.condition = condition;
        newnode->assert.message = message;
        return newnode;
}

static 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 ast::CV::Qualifiers qsrc = src->qualifiers, qdst = dst->qualifiers; // optimization
        const ast::CV::Qualifiers duplicates = qsrc & qdst;

        if ( duplicates.any() ) {
                std::stringstream str;
                str << "duplicate ";
                ast::print( str, duplicates );
                str << "qualifier(s)";
                appendError( error, str.str() );
        } // for
} // DeclarationNode::checkQualifiers

void DeclarationNode::checkSpecifiers( DeclarationNode * src ) {
        ast::Function::Specs fsDups = funcSpecs & src->funcSpecs;
        if ( fsDups.any() ) {
                std::stringstream str;
                str << "duplicate ";
                ast::print( str, fsDups );
                str << "function specifier(s)";
                appendError( error, str.str() );
        } // if

        // Skip if everything is unset.
        if ( storageClasses.any() && src->storageClasses.any() ) {
                ast::Storage::Classes dups = storageClasses & src->storageClasses;
                // Check for duplicates.
                if ( dups.any() ) {
                        std::stringstream str;
                        str << "duplicate ";
                        ast::print( str, dups );
                        str << "storage class(es)";
                        appendError( error, str.str() );
                // Check for conflicts.
                } else if ( !src->storageClasses.is_threadlocal_any() ) {
                        std::stringstream str;
                        str << "conflicting ";
                        ast::print( str, ast::Storage::Classes( 1 << storageClasses.ffs() ) );
                        str << "& ";
                        ast::print( str, ast::Storage::Classes( 1 << src->storageClasses.ffs() ) );
                        str << "storage classes";
                        appendError( error, str.str() );
                        // FIX to preserve invariant of one basic storage specifier
                        src->storageClasses.reset();
                }
        } // if

        appendError( error, src->error );
} // DeclarationNode::checkSpecifiers

DeclarationNode * DeclarationNode::copySpecifiers( DeclarationNode * q ) {
        funcSpecs |= q->funcSpecs;
        storageClasses |= q->storageClasses;

        std::vector<ast::ptr<ast::Attribute>> tmp;
        tmp.reserve( q->attributes.size() );
        for ( auto const & attr : q->attributes ) {
                tmp.emplace_back( ast::shallowCopy( attr.get() ) );
        }
        spliceBegin( attributes, tmp );

        return this;
} // DeclarationNode::copySpecifiers

static void addQualifiersToType( TypeData *& src, TypeData * dst ) {
        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 ) { return this; }                                                     // empty qualifier

        checkSpecifiers( q );
        copySpecifiers( q );

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

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

        if ( q->type->forall ) {                                                        // forall qualifier ?
                if ( type->forall ) {                                                   // polymorphic routine ?
                        type->forall->appendList( q->type->forall ); // augment forall qualifier
                } else {
                        if ( type->kind == TypeData::Aggregate ) {      // struct/union ?
                                if ( type->aggregate.params ) {                 // polymorphic ?
                                        type->aggregate.params->appendList( q->type->forall ); // augment forall qualifier
                                } else {                                                                // not polymorphic
                                        type->aggregate.params = q->type->forall; // set forall qualifier
                                } // if
                        } else {                                                                        // not polymorphic
                                type->forall = q->type->forall;                 // make polymorphic routine
                        } // if
                } // if
                q->type->forall = nullptr;                                              // forall qualifier moved
        } // if

        checkQualifiers( type, q->type );
        if ( (builtin == Zero || builtin == One) && q->type->qualifiers.any() && error.length() == 0 ) {
                SemanticWarning( yylloc, Warning::BadQualifiersZeroOne, builtinTypeNames[builtin] );
        } // if
        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->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 )
                                        SemanticError( yylloc, src, string( "conflicting type specifier " ) + DeclarationNode::basicTypeNames[ src->basictype ] + " in type: " );

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

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

                                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 )
                                        SemanticError( yylloc, src, string( "conflicting type specifier " ) + DeclarationNode::lengthNames[ src->length ] + " in type: " );
                        } // 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 ) {
                checkSpecifiers( o );
                copySpecifiers( 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->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::addEnumBase( DeclarationNode * o ) {
        if ( o && o -> type)  {
                type->base= o->type;
        }
        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 != ast::TypeDecl::NUMBER_OF_KINDS ) {
                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, ExpressionNode * withExprs ) {
        assert( type );
        assert( type->kind == TypeData::Function );
        assert( ! type->function.body );
        type->function.body = body;
        type->function.withExprs = withExprs;
        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 ) {
                spliceBegin( attributes, a->attributes );
                a->attributes.clear();
        } // if
        return this;
} // copyAttribute

DeclarationNode * DeclarationNode::addPointer( DeclarationNode * p ) {
        if ( p ) {
                assert( p->type->kind == TypeData::Pointer || p->type->kind == TypeData::Reference );
                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 || p->type->kind == TypeData::Reference );
                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 ) return this;
        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;
}

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::addTypeInitializer( DeclarationNode * init ) {
        assertf( variable.tyClass != ast::TypeDecl::NUMBER_OF_KINDS, "Called addTypeInitializer on something that isn't a type variable." );
        variable.initializer = init;
        return this;
}

DeclarationNode * DeclarationNode::cloneType( string * name ) {
        DeclarationNode * newnode = newName( name );
        newnode->type = maybeClone( type );
        newnode->copySpecifiers( this );
        return newnode;
}

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

        o->copySpecifiers( 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;
                                newType->aggInst.aggregate->enumeration.body = false;
                        } else {
                                assert( newType->aggInst.aggregate->kind == TypeData::Aggregate );
                                delete newType->aggInst.aggregate->aggregate.fields;
                                newType->aggInst.aggregate->aggregate.fields = nullptr;
                                newType->aggInst.aggregate->aggregate.body = false;
                        } // 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;
}

// If a typedef wraps an anonymous declaration, name the inner declaration
// so it has a consistent name across translation units.
static void nameTypedefedDecl(
                DeclarationNode * innerDecl,
                const DeclarationNode * outerDecl ) {
        TypeData * outer = outerDecl->type;
        assert( outer );
        // First make sure this is a typedef:
        if ( outer->kind != TypeData::Symbolic || !outer->symbolic.isTypedef ) {
                return;
        }
        TypeData * inner = innerDecl->type;
        assert( inner );
        // Always clear any CVs associated with the aggregate:
        inner->qualifiers.reset();
        // Handle anonymous aggregates: typedef struct { int i; } foo
        if ( inner->kind == TypeData::Aggregate && inner->aggregate.anon ) {
                delete inner->aggregate.name;
                inner->aggregate.name = new string( "__anonymous_" + *outerDecl->name );
                inner->aggregate.anon = false;
                assert( outer->base );
                delete outer->base->aggInst.aggregate->aggregate.name;
                outer->base->aggInst.aggregate->aggregate.name = new string( "__anonymous_" + *outerDecl->name );
                outer->base->aggInst.aggregate->aggregate.anon = false;
                outer->base->aggInst.aggregate->qualifiers.reset();
        // Handle anonymous enumeration: typedef enum { A, B, C } foo
        } else if ( inner->kind == TypeData::Enum && inner->enumeration.anon ) {
                delete inner->enumeration.name;
                inner->enumeration.name = new string( "__anonymous_" + *outerDecl->name );
                inner->enumeration.anon = false;
                assert( outer->base );
                delete outer->base->aggInst.aggregate->enumeration.name;
                outer->base->aggInst.aggregate->enumeration.name = new string( "__anonymous_" + *outerDecl->name );
                outer->base->aggInst.aggregate->enumeration.anon = false;
                // No qualifiers.reset() here.
        }
}

// This code handles a special issue with the attribute transparent_union.
//
//    typedef union U { int i; } typedef_name __attribute__(( aligned(16) )) __attribute__(( transparent_union ))
//
// Here the attribute aligned goes with the typedef_name, so variables declared of this type are
// aligned.  However, the attribute transparent_union must be moved from the typedef_name to
// alias union U.  Currently, this is the only know attribute that must be moved from typedef to
// alias.
static void moveUnionAttribute( ast::Decl * decl, ast::UnionDecl * unionDecl ) {
        if ( auto typedefDecl = dynamic_cast<ast::TypedefDecl *>( decl ) ) {
                // Is the typedef alias a union aggregate?
                if ( nullptr == unionDecl ) return;

                // If typedef is an alias for a union, then its alias type was hoisted above and remembered.
                if ( auto unionInstType = typedefDecl->base.as<ast::UnionInstType>() ) {
                        auto instType = ast::mutate( unionInstType );
                        // Remove all transparent_union attributes from typedef and move to alias union.
                        for ( auto attr = instType->attributes.begin() ; attr != instType->attributes.end() ; ) {
                                assert( *attr );
                                if ( (*attr)->name == "transparent_union" || (*attr)->name == "__transparent_union__" ) {
                                        unionDecl->attributes.emplace_back( attr->release() );
                                        attr = instType->attributes.erase( attr );
                                } else {
                                        attr++;
                                }
                        }
                        typedefDecl->base = instType;
                }
        }
}

// Get the non-anonymous name of the instance type of the declaration,
// if one exists.
static const std::string * getInstTypeOfName( ast::Decl * decl ) {
        if ( auto dwt = dynamic_cast<ast::DeclWithType *>( decl ) ) {
                if ( auto aggr = dynamic_cast<ast::BaseInstType const *>( dwt->get_type() ) ) {
                        if ( aggr->name.find("anonymous") == std::string::npos ) {
                                return &aggr->name;
                        }
                }
        }
        return nullptr;
}

std::vector<ast::ptr<ast::StructDecl>> buildDataConstructors( DeclarationNode * firstNode ) {
        std::vector<ast::ptr<ast::StructDecl>> outputList;
        std::back_insert_iterator<std::vector<ast::ptr<ast::StructDecl>>> out( outputList );
        for ( const DeclarationNode * cur = firstNode; cur; cur = strict_next( cur ) ) {

                assert( cur->type->kind == TypeData::Symbolic );
                const std::string * name = cur->name;
                auto ctor = new ast::StructDecl( cur->location,
                        std::string(*name),
                        ast::AggregateDecl::Aggregate::Struct
                );
                ctor->set_body(true);
                TypeData * td = cur->type;
                TypeData::Symbolic_t st = td->symbolic;
                DeclarationNode * params = st.params;
                
                if ( params ) {
                        buildList( params, ctor->members );
                }

                for ( std::size_t i = 0; i < ctor->members.size(); ++i ) {
                        assert(ctor->members[i]->name == "");
                        ast::Decl * member = ctor->members[i].get_and_mutate();
                        member->name = "field_" + std::to_string(i);
                }

                *out++ = ctor;          
        }
        return outputList;
}

void buildDataConstructorsAsMember( DeclarationNode * firstNode, ast::AdtDecl * adtDecl ) {
        std::back_insert_iterator<std::vector<ast::ptr<ast::Decl>>> out( adtDecl->members );
        for ( const DeclarationNode * cur = firstNode; cur; cur = strict_next( cur ) ) {

                assert( cur->type->kind == TypeData::Symbolic );
                const std::string * name = cur->name;
                auto ctor = new ast::StructDecl( cur->location,
                        std::string(*name),
                        ast::AggregateDecl::Aggregate::Struct
                );
                ctor->set_body(true);
                TypeData * td = cur->type;
                TypeData::Symbolic_t st = td->symbolic;
                DeclarationNode * params = st.params;
                
                if ( params ) {
                        buildList( params, ctor->members );
                }

                for ( std::size_t i = 0; i < ctor->members.size(); ++i ) {
                        assert(ctor->members[i]->name == "");
                        ast::Decl * member = ctor->members[i].get_and_mutate();
                        member->name = "field_" + std::to_string(i);
                }

                *out++ = ctor;          
        }
}

ast::UnionDecl * buildDataUnion( const CodeLocation & loc, const std::vector<ast::ptr<ast::Decl>> & typeList ) {
        ast::UnionDecl * out = new ast::UnionDecl( loc, "temp_data_union" );
        // size_t index = 0;
        if ( typeList.size() > 0 ) out->set_body( true );
        size_t i = 0;
        for (const ast::ptr<ast::Decl> structDecl : typeList ) {
                ast::StructInstType * inst = new ast::StructInstType( structDecl.as< ast::StructDecl >() );
                ast::ObjectDecl * instObj = new ast::ObjectDecl(
                        structDecl->location,
                        "option_" + std::to_string(i),
                        inst
                );
                i++;
                out->members.push_back( instObj );

        }
        return out;
}

ast::EnumDecl * buildTag( const CodeLocation & loc, std::vector<ast::ptr<ast::Decl>> & typeList ) {
        ast::EnumDecl * out = new ast::EnumDecl( loc, "temp_data_tag" );
        if ( typeList.size() > 0 ) out->set_body( true );
        for ( const ast::ptr<ast::Decl> structDecl : typeList ) {
                ast::EnumInstType * inst = new ast::EnumInstType( out );
                assert( inst->base != nullptr );
                ast::ObjectDecl * instObj = new ast::ObjectDecl(
                        structDecl->location,
                        structDecl->name,
                        inst
                );
                out->members.push_back( instObj );
        }
        return out;
}

ast::StructDecl * buildTaggedUnions( const TypeData * data, const ast::EnumDecl * tags, const ast::UnionDecl * data_union ) {
        assert( tags->members.size() == data_union->members.size() );
        ast::StructDecl * out = new ast::StructDecl( data->location, (*(data->adt.name)) + "_tag_union" );
        out->kind = ast::AggregateDecl::Adt;

        out->set_body( true );

        ast::EnumInstType * tag = new ast::EnumInstType( tags );
        ast::ObjectDecl * tag_obj = new ast::ObjectDecl(
                data->location,
                "tag",
                tag
        );
        ast::UnionInstType * value = new ast::UnionInstType( data_union );
        ast::ObjectDecl * value_obj = new ast::ObjectDecl(
                data->location,
                "value",
                value
        );

        out->members.push_back( value_obj );
        out->members.push_back( tag_obj );
        return out;
}

void buildList( DeclarationNode * firstNode,
                std::vector<ast::ptr<ast::Decl>> & outputList ) {
        SemanticErrorException errors;
        std::back_insert_iterator<std::vector<ast::ptr<ast::Decl>>> out( outputList );

        for ( const DeclarationNode * cur = firstNode ; cur ; cur = strict_next( cur ) ) {
                try {
                        bool extracted_named = false;
                        ast::UnionDecl * unionDecl = nullptr;

                        if ( DeclarationNode * extr = cur->extractAggregate() ) {
                                assert( cur->type );
                                nameTypedefedDecl( extr, cur );

                                if ( ast::Decl * decl = extr->build() ) {
                                        // Remember the declaration if it is a union aggregate ?
                                        unionDecl = dynamic_cast<ast::UnionDecl *>( decl );

                                        *out++ = decl;

                                        // need to remember the cases where a declaration contains an anonymous aggregate definition
                                        assert( extr->type );
                                        if ( extr->type->kind == TypeData::Aggregate ) {
                                                // typedef struct { int A } B is the only case?
                                                extracted_named = !extr->type->aggregate.anon;
                                        } else if ( extr->type->kind == TypeData::Enum ) {
                                                // typedef enum { A } B is the only case?
                                                extracted_named = !extr->type->enumeration.anon;
                                        } else {
                                                extracted_named = true;
                                        }
                                } // if
                                delete extr;
                        } // if

                        if ( ast::Decl * decl = cur->build() ) {
                                moveUnionAttribute( decl, unionDecl );

                                if ( "" == decl->name && !cur->get_inLine() ) {
                                        // Don't include anonymous declaration for named aggregates,
                                        // but do include them for anonymous aggregates, e.g.:
                                        // struct S {
                                        //   struct T { int x; }; // no anonymous member
                                        //   struct { int y; };   // anonymous member
                                        //   struct T;            // anonymous member
                                        // };
                                        if ( extracted_named ) {
                                                continue;
                                        }

                                        if ( auto name = getInstTypeOfName( decl ) ) {
                                                // Temporary: warn about anonymous member declarations of named types, since
                                                // this conflicts with the syntax for the forward declaration of an anonymous type.
                                                SemanticWarning( cur->location, Warning::AggrForwardDecl, name->c_str() );
                                        }
                                } // if
                                *out++ = decl;
                        } // if
                } catch ( SemanticErrorException & e ) {
                        errors.append( e );
                } // try
        } // for

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

// currently only builds assertions, function parameters, and return values
void buildList( DeclarationNode * firstNode, std::vector<ast::ptr<ast::DeclWithType>> & outputList ) {
        SemanticErrorException errors;
        std::back_insert_iterator<std::vector<ast::ptr<ast::DeclWithType>>> out( outputList );

        for ( const DeclarationNode * cur = firstNode; cur; cur = strict_next( cur ) ) {
                try {
                        ast::Decl * decl = cur->build();
                        assertf( decl, "buildList: build for ast::DeclWithType." );
                        if ( ast::DeclWithType * dwt = dynamic_cast<ast::DeclWithType *>( decl ) ) {
                                dwt->location = cur->location;
                                *out++ = dwt;
                        } else if ( ast::StructDecl * agg = dynamic_cast<ast::StructDecl *>( decl ) ) {
                                // e.g., int foo(struct S) {}
                                auto inst = new ast::StructInstType( agg->name );
                                auto obj = new ast::ObjectDecl( cur->location, "", inst );
                                obj->linkage = linkage;
                                *out++ = obj;
                                delete agg;
                        } else if ( ast::UnionDecl * agg = dynamic_cast<ast::UnionDecl *>( decl ) ) {
                                // e.g., int foo(union U) {}
                                auto inst = new ast::UnionInstType( agg->name );
                                auto obj = new ast::ObjectDecl( cur->location,
                                        "", inst, nullptr, ast::Storage::Classes(),
                                        linkage );
                                *out++ = obj;
                        } else if ( ast::EnumDecl * agg = dynamic_cast<ast::EnumDecl *>( decl ) ) {
                                // e.g., int foo(enum E) {}
                                auto inst = new ast::EnumInstType( agg->name );
                                auto obj = new ast::ObjectDecl( cur->location,
                                        "",
                                        inst,
                                        nullptr,
                                        ast::Storage::Classes(),
                                        linkage
                                );
                                *out++ = obj;
                        } else {
                                assertf( false, "buildList: Could not convert to ast::DeclWithType." );
                        } // if
                } catch ( SemanticErrorException & e ) {
                        errors.append( e );
                } // try
        } // for

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

void buildTypeList( const DeclarationNode * firstNode,
                std::vector<ast::ptr<ast::Type>> & outputList ) {
        SemanticErrorException errors;
        std::back_insert_iterator<std::vector<ast::ptr<ast::Type>>> out( outputList );

        for ( const DeclarationNode * cur = firstNode ; cur ; cur = strict_next( cur ) ) {
                try {
                        * out++ = cur->buildType();
                } catch ( SemanticErrorException & e ) {
                        errors.append( e );
                } // try
        } // for

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

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

        if ( asmStmt ) {
                auto stmt = strict_dynamic_cast<ast::AsmStmt *>( asmStmt->build() );
                return new ast::AsmDecl( stmt->location, stmt );
        } // if
        if ( directiveStmt ) {
                auto stmt = strict_dynamic_cast<ast::DirectiveStmt *>( directiveStmt->build() );
                return new ast::DirectiveDecl( stmt->location, stmt );
        } // if

        if ( variable.tyClass != ast::TypeDecl::NUMBER_OF_KINDS ) {
                // otype is internally converted to dtype + otype parameters
                static const ast::TypeDecl::Kind kindMap[] = { ast::TypeDecl::Dtype, ast::TypeDecl::Dtype, ast::TypeDecl::Dtype, ast::TypeDecl::Ftype, ast::TypeDecl::Ttype, ast::TypeDecl::Dimension };
                static_assert( sizeof(kindMap) / sizeof(kindMap[0]) == ast::TypeDecl::NUMBER_OF_KINDS, "DeclarationNode::build: kindMap is out of sync." );
                assertf( variable.tyClass < sizeof(kindMap)/sizeof(kindMap[0]), "Variable's tyClass is out of bounds." );
                ast::TypeDecl * ret = new ast::TypeDecl( location,
                        *name,
                        ast::Storage::Classes(),
                        (ast::Type *)nullptr,
                        kindMap[ variable.tyClass ],
                        variable.tyClass == ast::TypeDecl::Otype || variable.tyClass == ast::TypeDecl::DStype,
                        variable.initializer ? variable.initializer->buildType() : nullptr
                );
                buildList( variable.assertions, ret->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 && funcSpecs.any() ) {
                        SemanticError( this, "invalid function specifier for " );
                } // if
                // Forall qualifier can only appear on a function/aggregate definition/declaration.
                //
                //    forall int f();                                   // allowed
                //    forall int g( int i );                    // allowed
                //    forall int i;                                             // disallowed
                if ( type->kind != TypeData::Function && type->forall ) {
                        SemanticError( this, "invalid type qualifier for " );
                } // if
                bool isDelete = initializer && initializer->get_isDelete();
                ast::Decl * decl = buildDecl(
                        type,
                        name ? *name : string( "" ),
                        storageClasses,
                        maybeBuild( bitfieldWidth ),
                        funcSpecs,
                        linkage,
                        asmName,
                        isDelete ? nullptr : maybeBuild( initializer ),
                        copy( attributes )
                )->set_extension( extension );
                if ( isDelete ) {
                        auto dwt = strict_dynamic_cast<ast::DeclWithType *>( decl );
                        dwt->isDeleted = true;
                }
                return decl;
        } // if

        if ( assert.condition ) {
                auto cond = maybeBuild( assert.condition );
                auto msg = strict_dynamic_cast<ast::ConstantExpr *>( maybeCopy( assert.message ) );
                return new ast::StaticAssertDecl( location, cond, msg );
        }

        // SUE's cannot have function specifiers, either
        //
        //    inline _Noreturn struct S { ... };                // disallowed
        //    inline _Noreturn enum   E { ... };                // disallowed
        if ( funcSpecs.any() ) {
                SemanticError( this, "invalid function specifier for " );
        } // if
        if ( enumInLine ) {
                return new ast::InlineMemberDecl( location,
                        *name, (ast::Type*)nullptr, storageClasses, linkage );
        } // if
        assertf( name, "ObjectDecl must a have name\n" );
        auto ret = new ast::ObjectDecl( location,
                *name,
                (ast::Type*)nullptr,
                maybeBuild( initializer ),
                storageClasses,
                linkage,
                maybeBuild( bitfieldWidth )
        );
        ret->asmName = asmName;
        ret->extension = extension;
        return ret;
}

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

        switch ( type->kind ) {
        case TypeData::Enum:
        case TypeData::Aggregate: {
                ast::BaseInstType * ret =
                        buildComAggInst( type, copy( attributes ), linkage );
                buildList( type->aggregate.actuals, ret->params );
                return ret;
        }
        case TypeData::Symbolic: {
                ast::TypeInstType * ret = new ast::TypeInstType(
                        *type->symbolic.name,
                        // This is just a default, the true value is not known yet.
                        ast::TypeDecl::Dtype,
                        buildQualifiers( type ),
                        copy( attributes ) );
                buildList( type->symbolic.actuals, ret->params );
                return ret;
        }
        default:
                ast::Type * simpletypes = typebuild( type );
                // copy because member is const
                simpletypes->attributes = attributes;
                return simpletypes;
        } // switch
}

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