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ObxAst.cpp
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ObxAst.cpp
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/*
* Copyright 2021 Rochus Keller <mailto:me@rochus-keller.ch>
*
* This file is part of the OBX parser/code model library.
*
* The following is the license that applies to this copy of the
* library. For a license to use the library under conditions
* other than those described here, please email to me@rochus-keller.ch.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License (GPL) versions 2.0 or 3.0 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in
* the packaging of this file. Please review the following information
* to ensure GNU General Public Licensing requirements will be met:
* http://www.fsf.org/licensing/licenses/info/GPLv2.html and
* http://www.gnu.org/copyleft/gpl.html.
*/
#include "ObxAst.h"
#include "ObLexer.h"
#include <QtDebug>
#include <limits>
using namespace Obx;
using namespace Ob;
const char* Thing::s_tagName[] =
{
"Thing", "Module", "Import", "Pointer", "Record", "BaseType", "Array", "ProcType", "NamedType",
"CallExpr", "Literal", "SetExpr", "IdentLeaf", "UnExpr", "IdentSel", "BinExpr", "Field",
"Const", "BuiltIn", "Parameter", "Return", "Procedure", "Variable", "LocalVar",
"QualiType", "Call", "Assign", "IfLoop", "ForLoop", "CaseStmt", "Scope",
"Enumeration", "Generic", "Exit"
};
const char* BaseType::s_typeName[] =
{
"NONE", "ANY", "ANYREC", "VOID", "NIL", "#BYTEARRAY", "#STRING", "#WSTRING", "BOOLEAN", "CHAR", "WCHAR", "BYTE",
"INT8", "INT16", "INT32", "INT64", "REAL", "LONGREAL", "SET", "#ENUMINT"
};
const char* BuiltIn::s_typeName[] =
{
"ABS", "ODD", "LEN", "LSL", "ASR", "ROR", "FLOOR", "FLT", "ORD",
"CHR", "INC", "DEC", "INCL", "EXCL", "NEW", "ASSERT", "PACK", "UNPK",
"LED", "TRAP", "TRAPIF", "TRACE", "NOP", "LDMOD", "LDCMD",
"ADR", "BIT", "GET", "H", "LDREG", "PUT", "REG", "PORTIN", "PORTOUT", "VAL", "COPY",
"MAX", "CAP", "LONG", "SHORT", "HALT", "COPY", "ASH", "MIN", "SIZE", "ENTIER",
"BITS",
// Oberon-2 SYSTEM
"MOVE", "NEW", "ROT", "LSH", "GETREG", "PUTREG",
// Blackbox
"TYP",
// Oberon+
"CAST", "STRLEN", "WCHR", "PRINT", "PRINTLN", "DEFAULT", "BITAND", "BITNOT", "BITOR", "BITXOR",
"BITSHL", "BITSHR", "BITASR", "BYTES", "NUMBER", "ADR", "PCALL", "RAISE"
};
const char* UnExpr::s_opName[] =
{
"???",
"NEG", "NOT", "DEREF", "ADDROF", "CAST", "SEL", "CALL", "IDX"
};
const char* BinExpr::s_opName[] =
{
"???",
"Range",
"EQ", "NEQ", "LE", "LEQ", "GT", "GEQ", "IN", "IS",
"ADD", "SUB", "OR",
"MUL", "FDIV", "DIV", "MOD", "AND"
};
#define _USE_VISITED_SET
struct ObxAstPrinter : public AstVisitor
{
#ifdef _USE_VISITED_SET
QSet<Type*> visited;
bool namedType( Type* t )
{
//if( t->d_minst )
out << t << " ";
if( t->d_slotValid )
out << "slot " << t->d_slot << " ";
return false;
}
#else
bool namedType( Type* t )
{
if( t->d_decl && t->d_decl->getTag() == Thing::T_NamedType && t->d_decl != curNamed && !t->d_minst )
{
out << "( TREF " << t->d_decl->d_name << " ) ";
return true;
}
return false;
}
#endif
void visit( BaseType* t)
{
if( namedType(t) )
return;
out << BaseType::s_typeName[t->d_baseType] << " ";
}
void visit( Pointer* t)
{
if( namedType(t) )
return;
out << "POINTER ";
if( t->d_to.isNull() )
out << "? ";
else
t->d_to->accept(this);
}
void visit( Array* t )
{
if( namedType(t) )
return;
out << "ARRAY ";
if( t->d_vla )
out << "var ";
else
out << t->d_len << " ";
if( t->d_type.isNull() )
out << "? ";
else
t->d_type->accept(this);
}
void visit( Record* t )
{
if( namedType(t) )
return;
out << "RECORD ";
d_level++;
if( !t->d_base.isNull() )
{
out << endl << ws();
out << "BASE ";
out << t->d_baseRec << " ";
t->d_base->accept(this);
out << " ";
}
for( int i = 0; i < t->d_fields.size(); i++ )
{
out << endl;
out << ws() << "F " << t->d_fields[i]->d_name << " ";
if( t->d_fields[i]->d_type.isNull() )
out << "? ";
else
t->d_fields[i]->d_type->accept(this);
}
for( int i = 0; i < t->d_methods.size(); i++ )
{
out << endl;
out << ws() << "M " << t->d_methods[i]->d_name << " ";
if( t->d_methods[i]->d_type.isNull() )
out << "? ";
else
t->d_methods[i]->d_type->accept(this);
}
d_level--;
}
void visit( ProcType* t )
{
if( namedType(t) )
return;
out << "PROC ";
if( !t->d_formals.isEmpty() )
out << "( ";
for( int i = 0; i < t->d_formals.size(); i++ )
{
out << t->d_formals[i]->d_name << " ";
// formals also appear as part of scope names
}
if( !t->d_formals.isEmpty() )
out << ")";
}
void visit( QualiType* t )
{
if( namedType(t) )
return;
t->d_quali->accept(this);
}
void visit( Field* n)
{
Q_ASSERT( false );
out << ws() << "F " << n->d_name << " ";
if( n->d_type.isNull() )
out << "? ";
else
n->d_type->accept(this);
out << endl;
}
void renderLive( Named* r )
{
out << " ";
if( r->d_liveFrom )
out << "live " << r->d_liveFrom << "-" << r->d_liveTo << " ";
if( r->d_slotValid )
out << "slot " << r->d_slot;
if( r->d_upvalSource )
out << "uvsrc ";
if( r->d_upvalIntermediate )
out << "uvint ";
if( r->d_upvalSink )
out << "uvsnk ";
}
void renderVar( Named* r )
{
out << r->d_name << " ";
if( r->d_slotValid )
out << "slot " << r->d_slot << " ";
if( r->d_type.isNull() )
out << "?";
else
r->d_type->accept(this);
//renderLive(r);
out << endl;
}
void visit( Variable* n )
{
out << ws() << "V ";
renderVar( n );
}
void visit( LocalVar* n )
{
out << ws() << "V ";
renderVar( n );
}
void visit( Parameter* n )
{
out << ws() << "P ";
renderVar( n );
}
void visit( NamedType* n )
{
curNamed = n;
#ifdef _USE_VISITED_SET
visited.insert(n->d_type.data());
#endif
out << ws() << "T " << n->d_name << " ";
if( n->d_slotValid )
out << "slot " << n->d_slot << " ";
if( n->d_type.isNull() )
out << "? ";
else
n->d_type->accept(this);
out << endl;
curNamed = 0;
}
void visit( Const* n )
{
out << ws() << "C " << n->d_name << " ";
if( n->d_type.isNull() )
out << "? ";
else
n->d_type->accept(this);
out << "'" << n->d_val.toByteArray().simplified() << "'";
out << " " << endl;
}
void visit( Import* n)
{
out << ws() << "I " << n->d_name << " ";
if( n->d_slotValid )
out << "slot " << n->d_slot << " ";
out << n->d_mod->d_name;
if( !n->d_metaActuals.isEmpty() )
{
out << "( METAINST ";
d_level++;
for( int i = 0; i < n->d_metaActuals.size(); i++ )
{
out << endl << ws();
out << "TPAR ";
n->d_metaActuals[i].d_constExpr->accept(this);
}
d_level--;
out << " ) ";
}
out << endl;
}
void visit( Procedure* m )
{
if( m->d_receiver )
{
out << ws() << "METHOD ";
m->d_receiver->d_type->accept(this);
out << ". " << m->d_name << " ";
}else
out << ws() << "PROCEDURE " << m->d_name << " ";
if( m->d_slotValid )
out << "slot " << m->d_slot << " ";
if( m->d_type.isNull() )
out << "? ";
else
m->d_type->accept(this);
//renderLive(m);
out << endl;
d_level++;
for( int i = 0; i < m->d_order.size(); i++ )
m->d_order[i]->accept(this);
if( !m->d_body.isEmpty() )
{
out << ws() << "BEGIN" << endl;
d_level++;
for( int i = 0; i < m->d_body.size(); i++ )
m->d_body[i]->accept(this);
d_level--;
}
d_level--;
}
void visit( BuiltIn* ) {}
void visit( Module* m )
{
out << ws() << ( m->d_isDef ? "DEFINITION " : "MODULE " ) << m->getName() << " " << m << endl;
d_level++;
for( int i = 0; i < m->d_order.size(); i++ )
m->d_order[i]->accept(this);
if( !m->d_body.isEmpty() )
{
out << ws() << "BEGIN" << endl;
d_level++;
for( int i = 0; i < m->d_body.size(); i++ )
m->d_body[i]->accept(this);
d_level--;
}
d_level--;
}
void visit( Call* s)
{
out << ws();
s->d_what->accept(this);
out << endl;
}
void visit( Return* s)
{
out << ws() << "RETURN ";
if( s->d_what )
s->d_what->accept(this);
out << endl;
}
void visit( Assign* s )
{
out << ws() << "ASSIG ";
s->d_lhs->accept(this);
out << ":= ";
s->d_rhs->accept(this);
out << endl;
}
void visit( IfLoop* s)
{
// LOOP has no if, only then; Q_ASSERT( s->d_if.size() == s->d_then.size() );
for( int i = 0; i < s->d_then.size(); i++ )
{
out << ws();
if( i == 0 )
{
switch( s->d_op )
{
case IfLoop::IF:
out << "IF ";
break;
case IfLoop::WHILE:
out << "WHILE ";
break;
case IfLoop::REPEAT:
out << "REPEAT ";
break;
case IfLoop::WITH:
out << "WITH ";
break;
case IfLoop::LOOP:
out << "LOOP ";
break;
default:
Q_ASSERT(false);
}
}else
out << "ELSIF ";
if( i < s->d_if.size() )
s->d_if[i]->accept(this);
out << "THEN " << endl;
d_level++;
const StatSeq& body = s->d_then[i];
for( int j = 0; j < body.size(); j++ )
body[j]->accept(this);
d_level--;
}
if( !s->d_else.isEmpty() )
{
out << ws() << "ELSE" << endl;
d_level++;
const StatSeq& body = s->d_else;
for( int j = 0; j < body.size(); j++ )
body[j]->accept(this);
d_level--;
}
}
void visit( ForLoop* s )
{
out << ws() << "FOR " << s->d_id->getIdent()->d_name << " := ";
s->d_from->accept(this);
out << "TO ";
s->d_to->accept(this);
out << "BY ";
s->d_by->accept(this);
out << "DO " << endl;
d_level++;
const StatSeq& body = s->d_do;
for( int j = 0; j < body.size(); j++ )
body[j]->accept(this);
d_level--;
}
void visit( CaseStmt* s )
{
out << ws() << "SWITCH ";
s->d_exp->accept(this);
out << endl;
d_level++;
for( int i = 0; i < s->d_cases.size(); i++ )
{
out << ws() << "CASE ";
for( int j = 0; j < s->d_cases[i].d_labels.size(); j++ )
{
if( j != 0 )
out << "| ";
s->d_cases[i].d_labels[j]->accept(this);
}
out << endl;
d_level++;
const StatSeq& body = s->d_cases[i].d_block;
for( int j = 0; j < body.size(); j++ )
body[j]->accept(this);
d_level--;
}
d_level--;
}
void visit( Literal* e )
{
out << "'" << e->d_val.toByteArray().simplified() << "' ";
}
void visit( SetExpr* e )
{
out << "( SET ";
for( int i = 0; i < e->d_parts.size(); i++ )
e->d_parts[i]->accept(this);
out << ") ";
}
void visit( IdentLeaf* e )
{
if( !e->d_ident.isNull() )
out << e->d_ident->d_name << " ";
}
void visit( UnExpr* e)
{
out << "( " << UnExpr::s_opName[e->d_op] << " ";
e->d_sub->accept(this);
if( e->d_op == UnExpr::CAST && !e->d_type.isNull() )
e->d_type->accept(this);
out << ") ";
}
void visit( IdentSel* e)
{
out << "( . ";
e->d_sub->accept(this);
if( !e->d_ident.isNull() )
out << e->d_ident->d_name;
else
out << "? ";
out << " ) ";
}
void visit( ArgExpr* e)
{
out << "( ";
switch( e->d_op )
{
case ArgExpr::CALL:
out << "CALL ";
break;
case ArgExpr::CAST:
out << "CAST ";
break;
case ArgExpr::IDX:
out << "IDX ";
break;
default:
Q_ASSERT( false );
}
e->d_sub->accept(this);
for( int i = 0; i < e->d_args.size(); i++ )
e->d_args[i]->accept(this);
out << ") ";
}
void visit( BinExpr* e )
{
out << "( " << BinExpr::s_opName[e->d_op] << " ";
e->d_lhs->accept(this);
e->d_rhs->accept(this);
out << ") ";
}
void visit( Exit* me)
{
out << ws() << "EXIT ";
}
QByteArray ws() const
{
QByteArray ws;
for( int i = 0; i < d_level; i++ )
ws += "| ";
return ws;
}
QTextStream& out;
Named* curNamed;
int d_level;
ObxAstPrinter(QTextStream& o):out(o),d_level(0),curNamed(0) {}
};
Named*Scope::find(const QByteArray& name, bool recursive) const
{
Names::const_iterator i = d_names.find( name.constData() );
if( i != d_names.end() )
return i.value();
if( recursive && d_scope )
return d_scope->find(name);
else
return 0;
}
bool Scope::add(Named* n)
{
Q_ASSERT( n != 0 );
if( find(n->d_name,false) )
return false;
// else
d_names[n->d_name.constData()] = n;
d_order.append(n);
n->d_scope = this;
switch( n->getTag() )
{
case Thing::T_Parameter:
d_parCount++;
break;
case Thing::T_Variable:
case Thing::T_LocalVar:
d_varCount++;
break;
}
return true;
}
BuiltIn::BuiltIn(quint8 f, ProcType* pt):d_func(f)
{
d_name = Lexer::getSymbol(s_typeName[f]);
if( pt )
d_type = pt;
else
d_type = new ProcType();
Q_ASSERT( d_type->d_decl == 0 );
d_type->d_decl = this;
}
QByteArrayList BuiltIn::getValidNames()
{
QByteArrayList res;
for( int i = 0; i < MAXBUILTIN; i++ )
{
if( (i >= SYS_ADR && i <= SYS_COPY) ||
(i >= SYS_MOVE && i <= SYS_TYP) || i == ADR )
continue;
res.append(s_typeName[i]);
}
res << "INTEGER" << "LONGINT" << "SHORTINT";
return res;
}
ProcType::ProcType(const Type::List& f, Type* r):d_return(r)
{
for( int i = 0; i < f.size(); i++ )
{
Ref<Parameter> p = new Parameter();
p->d_type = f[i];
d_formals.append(p);
}
}
ProcType::ProcType(const Type::List& f, const ProcType::Vars& var, Type* r)
{
Q_ASSERT( f.size() == var.size() );
for( int i = 0; i < f.size(); i++ )
{
Ref<Parameter> p = new Parameter();
p->d_type = f[i];
p->d_var = var[i];
d_formals.append(p);
}
}
Parameter*ProcType::find(const QByteArray& name) const
{
if( name.isEmpty() )
return 0;
for( int i = 0; i < d_formals.size(); i++ )
{
if( d_formals[i]->d_name.constData() == name.constData() )
return d_formals[i].data();
}
return 0;
}
bool ProcType::isBuiltIn() const
{
return d_decl && d_decl->getTag() == Thing::T_BuiltIn;
}
void ProcType::addNonLocal(Named* n)
{
if( !d_nonLocals.contains(n) )
d_nonLocals.append(n);
}
ProcType*ArgExpr::getProcType() const
{
Q_ASSERT( !d_sub.isNull() && !d_sub->d_type.isNull() && d_sub->d_type->derefed()->getTag() == Thing::T_ProcType );
return cast<ProcType*>( d_sub->d_type->derefed() );
}
ArgExpr*Call::getCallExpr() const
{
Q_ASSERT( !d_what.isNull() && d_what->getTag() == Thing::T_ArgExpr );
return cast<ArgExpr*>( d_what.data() );
}
Module* Named::getModule() const
{
if( getTag() == Thing::T_Module )
return cast<Module*>(const_cast<Named*>(this));
else if( d_scope )
return d_scope->getModule();
else
return 0;
}
QByteArrayList Named::getQualifiedName() const
{
QByteArrayList res;
res.append( d_name );
Named* scope = d_scope;
while( scope && !scope->d_name.isEmpty() )
{
res.prepend(scope->getName());
scope = scope->d_scope;
}
return res;
}
bool Named::isPublic() const
{
if( d_visibility == ReadWrite || d_visibility == ReadOnly )
return true;
Module* m = getModule();
return m && m->d_isDef;
}
const char*Named::visibilitySymbol() const
{
switch( d_visibility)
{
default:
return "";
case ReadWrite:
return "*";
case ReadOnly:
return "-";
}
}
void Thing::setSlot(quint32 s)
{
Q_ASSERT( !d_slotValid );
d_slotValid = true;
Q_ASSERT( s <= MAX_SLOT );
d_slot = s;
}
void Thing::dump(QIODevice* d)
{
if( d )
{
QTextStream out(d);
ObxAstPrinter p(out);
accept(&p);
}else
{
QTextStream out(stdout);
ObxAstPrinter p(out);
accept(&p);
}
}
QualiType::ModItem QualiType::getQuali() const
{
Q_ASSERT( !d_quali.isNull() );
ModItem res;
res.second = d_quali->getIdent();
const int tag = d_quali->getTag();
switch( tag )
{
case Thing::T_IdentLeaf:
break; // NOP
case Thing::T_IdentSel:
{
IdentSel* i = cast<IdentSel*>( d_quali.data() );
Q_ASSERT( !i->d_sub.isNull() && i->d_sub->getTag() == Thing::T_IdentLeaf );
res.first = i->d_sub->getIdent();
}
break;
default:
Q_ASSERT( false );
break;
}
return res;
}
QByteArrayList QualiType::getQualiString() const
{
Q_ASSERT( !d_quali.isNull() );
QByteArrayList res;
switch( d_quali->getTag() )
{
case Thing::T_IdentLeaf:
{
IdentLeaf* i = cast<IdentLeaf*>( d_quali.data() );
res.append(i->d_name);
}
break;
case Thing::T_IdentSel:
{
IdentSel* i = cast<IdentSel*>( d_quali.data() );
Q_ASSERT( !i->d_sub.isNull() && i->d_sub->getTag() == Thing::T_IdentLeaf );
IdentLeaf* j = cast<IdentLeaf*>( i->d_sub.data() );
res.append(j->d_name);
res.append(i->d_name);
}
break;
default:
Q_ASSERT( false );
break;
}
return res;
}
bool QualiType::hasByteSize() const
{
if( !d_quali->d_type.isNull() )
return d_quali->d_type->hasByteSize();
else
return false;
}
quint32 QualiType::getByteSize() const
{
if( !d_quali->d_type.isNull() )
return d_quali->d_type->getByteSize();
else
return 0;
}
quint32 QualiType::getAlignment() const
{
if( !d_quali->d_type.isNull() )
return d_quali->d_type->getAlignment();
else
return 0;
}
Type*QualiType::derefed()
{
Q_ASSERT( !d_quali.isNull() );
if( d_quali->d_type.isNull() )
return this; // never return 0 with derefed
else if( d_quali->d_type.data() == this )
{
qWarning() << "qualident referring to itself" << d_quali->getModule()->d_file << d_loc.d_row << d_loc.d_col;
return this;
}else
return d_quali->d_type->derefed();
}
QString QualiType::pretty() const
{
Type* t = const_cast<QualiType*>(this)->derefed();
if( t && t != this )
return t->pretty();
if( d_quali.isNull() )
return "?";
const int qtag = d_quali->getTag();
if( qtag == Thing::T_IdentSel )
{
IdentSel* s = cast<IdentSel*>( d_quali.data() );
if( s->d_sub && s->d_sub->getTag() == Thing::T_IdentLeaf )
return QString("%1.%2").arg(cast<IdentLeaf*>(s->d_sub.data())->d_name.constData()).arg(s->d_name.constData());
else
return QString("?.%1").arg(s->d_name.constData());
}else if( qtag == Thing::T_IdentLeaf )
return cast<IdentLeaf*>(d_quali.data())->d_name;
return "?";
}
bool QualiType::isDotted() const
{
if( d_quali && d_quali->getTag() == Thing::T_IdentSel )
return true;
else
return false;
}
IdentLeaf::IdentLeaf(Named* id, const Ob::RowCol& loc, Module* mod, Type* t, IdentRole r):d_ident(id),d_role(r)
{
d_loc = loc;
d_type = t;
d_mod = mod;
}
quint8 IdentLeaf::visibilityFor(Module*) const
{
if( d_ident.isNull() )
return Named::Invalid;
switch( d_ident->getTag() )
{
case Thing::T_Import:
case Thing::T_Const:
case Thing::T_NamedType:
case Thing::T_Procedure:
case Thing::T_BuiltIn:
return Named::ReadOnly;
case Thing::T_LocalVar:
case Thing::T_Variable:
return Named::LocalAccess;
case Thing::T_Parameter:
{
Parameter* p = cast<Parameter*>(d_ident.data());
if( p->d_const )
return Named::ReadOnly;
else
return Named::LocalAccess;
}
break;
default:
break;
}
Q_ASSERT(false);
return Named::Invalid;
}
#ifdef _DEBUG
QSet<Thing*> Thing::insts;
Thing::Thing():d_slot(0),d_slotValid(false),d_slotAllocated(false),d_visited(false),d_unsafe(false),d_generic(false)
{
insts.insert(this);
}
Thing::~Thing()
{
insts.remove(this);
}
#endif
Named*Record::find(const QByteArray& name, bool recursive) const
{
Names::const_iterator i = d_names.find(name.constData());
if( i != d_names.end() )
return i.value();
if( recursive && d_baseRec != 0 )
return d_baseRec->find(name,recursive);
return 0;
}
QList<Field*> Record::getOrderedFields() const
{
QList<Field*> res;
if( d_baseRec )
res = d_baseRec->getOrderedFields();
for( int i = 0; i < d_fields.size(); i++ )
{
if( d_fields[i]->d_super )
{
if( d_fields[i]->d_super->d_slotValid && d_fields[i]->d_super->d_slot < d_fields.size() )
res[ d_fields[i]->d_super->d_slot ] = d_fields[i].data();
else
{
QByteArray name;
Named* id = findDecl(true);
if( id )
{
name = id->d_name;
Module* m = id->getModule();
if( m )
name += m->getName() + "." + id->d_name + " " + QByteArray::number(id->d_loc.d_row);
}
qWarning() << "Record::getOrderedFields: invalid super field slot:" << d_fields[i]->d_name
<< name.constData();
}
}else
res.append( d_fields[i].data() );
}
return res;
}
QList<Procedure*> Record::getOrderedMethods() const
{
QList<Procedure*> res;
if( d_baseRec )
res = d_baseRec->getOrderedMethods();
foreach( const Ref<Procedure>& p, d_methods )
{
const int pos = res.indexOf(p->d_super);
if( pos != -1 )
res[pos] = p.data();
else
res.append(p.data());
}
return res;
}
Record*Record::findBySlot(int slot) const
{
if( d_slot == slot )
return const_cast<Record*>(this);
for( int i = 0; i < d_subRecs.size(); i++ )
{
Record* r = d_subRecs[i]->findBySlot(slot);
if( r )
return r;
}
return 0;
}
quint32 Record::getByteSize() const
{
if( d_alignment > 0 )
return d_byteSize;
Record* r = const_cast<Record*>(this);
// http://www.catb.org/esr/structure-packing/#_structure_alignment_and_padding
if( d_union )
{
r->d_byteSize = 0;
r->d_alignment = 1;
for( int i = 0; i < d_fields.size(); i++ )
{
const int size = d_fields[i]->d_type->getByteSize();
const int alig = d_fields[i]->d_type->getAlignment();
if( size > r->d_byteSize )
r->d_byteSize = size;
if( alig > r->d_alignment )
r->d_alignment = alig;
d_fields[i]->d_slot = 0;
d_fields[i]->d_slotValid = true;
}
}else
{
int off = 0;
int maxAlig = 1;
for( int i = 0; i < d_fields.size(); i++ )
{
Type* t = d_fields[i]->d_type.data();
const int size = t->getByteSize();
const int alig = t->getAlignment();
if( alig > maxAlig )
maxAlig = alig;
if( i != 0 && alig )
{
// https://en.wikipedia.org/wiki/Data_structure_alignment#Computing_padding
const int padding = (alig - (off % alig)) % alig;
off += padding;
}
d_fields[i]->d_slot = off;