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ObCppGen.cpp
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/*
* Copyright 2019 Rochus Keller <mailto:me@rochus-keller.ch>
*
* This file is part of the Oberon 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 "ObCppGen.h"
#include <QDir>
#include <QtDebug>
#include <QCoreApplication>
#include <QDateTime>
#include <memory>
#include <typeinfo>
using namespace Ob;
bool isCppKeyword( const QByteArray& str ); // aus CppKeywordDetector.cpp
static inline const CodeModel::Type* derefed( const CodeModel::Type* t )
{
return ( t != 0 ? t->deref() : 0 );
}
static QByteArray quali( const SynTree* st )
{
Q_ASSERT( st != 0 && st->d_tok.d_type == SynTree::R_qualident );
if( st->d_children.size() == 1 )
return st->d_children.first()->d_tok.d_val;
else
return st->d_children.first()->d_tok.d_val + "::" + st->d_children.last()->d_tok.d_val;
}
CppGen::CppGen(CodeModel* mdl):d_mdl(mdl),d_errs(0),d_genStubs(true)
{
Q_ASSERT( mdl != 0 );
d_errs = mdl->getErrs();
}
bool CppGen::error(Errors::Source s, const SynTree* st, const QString& msg)
{
d_errs->error( s, st->d_tok.toLoc(), msg );
return false;
}
bool CppGen::warning(Errors::Source s, const SynTree* st, const QString& msg)
{
d_errs->warning( s, st->d_tok.toLoc(), msg );
return false;
}
bool CppGen::emitModules(const QString& outdir, const QString& ns, const QString& mod)
{
d_ns = ns;
d_outdir = outdir;
d_mod = mod;
d_nameNr = 1;
#if defined(OB_BBOX) || defined(OB_OBN2) || defined(OB_OBNX)
qWarning() << "CppGen does not support Oberon-2, Oberon 90, Oberon+ or Blackbox; crashes are likely";
#endif
const int precount = d_errs->getErrCount();
foreach( CodeModel::Module* m, d_mdl->getGlobalScope().d_mods )
{
qDebug() << "translating module" << m->d_name;
emitModule(m);
}
return precount == int(d_errs->getErrCount());
}
void CppGen::emitModule(const CodeModel::Module* m)
{
QDir dir(d_outdir);
if( !d_mod.isEmpty() )
{
dir.mkpath( d_mod );
dir.cd( d_mod );
}
QFile hfile( dir.absoluteFilePath( d_ns + m->d_name + ".h" ));
if( !hfile.open(QIODevice::WriteOnly ) )
{
d_errs->error(Errors::Generator,m->d_name, 0,0,QString("cannot open file '%1' for writing").arg(hfile.fileName()) );
return;
}
QTextStream hout(&hfile);
const QString guard = QString("__%1%2_H__").arg(d_ns).arg(m->d_name.data());
hout << "#ifndef " << guard << endl;
hout << "#define " << guard << endl << endl;
hout << "// Generated by " << qApp->applicationName() << " " << qApp->applicationVersion() <<
" on " << QDateTime::currentDateTime().toString(Qt::ISODate) << endl << endl;
hout << "#include <" << includeFileName( "_Global" ) << ".h>" << endl;
foreach( CodeModel::Module* dep, m->d_using )
hout << "#include <" << includeFileName( dep->d_name ) << ".h>" << endl;
hout << endl;
int lh = 0;
if( !d_ns.isEmpty() )
{
hout << "namespace " << d_ns << endl << "{" << endl;
lh++;
}
d_cmts.clear();
if( m->d_def )
d_cmts = d_mdl->getComments(m->d_def->d_tok.d_sourcePath);
d_nextCmt = 0;
emitHeader(m,hout,lh);
if( !d_ns.isEmpty() )
hout << "}" << endl << endl;
hout << "#endif // " << guard;
if( m->d_def != 0 )
{
QFile bfile( dir.absoluteFilePath( d_ns + m->d_name + ".cpp" ));
if( !bfile.open(QIODevice::WriteOnly ) )
{
d_errs->error(Errors::Generator,m->d_name, 0,0,QString("cannot open file '%1' for writing").arg(bfile.fileName()) );
return;
}
QTextStream bout(&bfile);
bout << "// Generated by " << qApp->applicationName() << " " << qApp->applicationVersion() <<
" on " << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
bout << "#include \"" << d_ns << m->d_name << ".h\"" << endl;
bout << "#include <memory>" << endl;
if( !d_ns.isEmpty() )
bout << "using namespace " << d_ns << ";" << endl << endl;
emitBody(m,bout);
}
}
void CppGen::emitHeader(const CodeModel::Module* m, QTextStream& out, int l)
{
out << ws(l) << "class " << escape(m->d_name) << " : public _Root" << endl <<
ws(l) << "{" << endl <<
ws(l) << "public:" << endl;
l++;
emitComment(m->d_def,out,l);
out << ws(l) << "static " << escape(m->d_name) << "* _inst();" << endl;
out << ws(l) << escape(m->d_name) << "();" << endl;
out << ws(l) << "~" << escape(m->d_name) << "();" << endl << endl;
emitDecls(m,out,l);
if( !m->d_procs.isEmpty() )
out << ws(l) << "// PROC" << endl;
foreach( const CodeModel::Procedure* v, m->d_procs )
{
emitProcDecl(v,out,l);
}
if( !m->d_procs.isEmpty() )
out << endl;
l--;
out << ws(l) << "};" << endl;
}
void CppGen::emitBody(const CodeModel::Module* m, QTextStream& out )
{
out << "static std::auto_ptr<" << escape(m->d_name) << "> s_inst;" << endl << endl;
foreach( const CodeModel::Element* c, m->getConsts() )
{
out << "const ";
const CodeModel::Type* type = d_mdl->typeOfExpression(m,c->d_st);
emitType( m, type, out, 0 );
out << " " << escape(m->d_name) << "::" << escape(c->d_name) << ";" << endl;
}
out << endl;
out << escape(m->d_name) << "* " << escape(m->d_name) << "::_inst()" << endl << "{" << endl;
out << ws(1) << "if( s_inst.get() == 0 )" << endl;
out << ws(2) << "s_inst.reset( new " << escape(m->d_name) << "() );" << endl;
out << ws(1) << "return s_inst.get();" << endl;
out << "}" << endl << endl;
foreach( const CodeModel::Procedure* v, m->d_procs )
{
emitProcBody(v,out);
}
// Constructor
out << escape(m->d_name) << "::" << escape(m->d_name) << "()" << endl << "{" << endl;
if( !m->d_body.isEmpty() )
out << ws(1) << "// BEGIN" << endl;
emitStatementSeq(m, m->d_body, out,1);
if( !m->d_body.isEmpty() )
out << ws(1) << "// END" << endl;
out << "}" << endl << endl;
// Destructor
out << escape(m->d_name) << "::~" << escape(m->d_name) << "()" << endl << "{" << endl;
out << ws(1) << "s_inst.release();" << endl;
out << "}" << endl << endl;
}
QString CppGen::includeFileName(const QString& modName)
{
QString path;
if( !d_mod.isEmpty() )
path = d_mod + "/";
if( !d_ns.isEmpty() )
path += d_ns;
path += modName;
return path;
}
QString CppGen::ws(int level)
{
return QString(level,QChar('\t'));
}
QString CppGen::basicType(const CodeModel::Type* t)
{
if( t == 0 )
return "int /* unknown type */";
switch( t->d_kind )
{
case CodeModel::Type::BOOLEAN:
return "bool";
case CodeModel::Type::CHAR:
return "char";
case CodeModel::Type::INTEGER:
return "int";
case CodeModel::Type::REAL:
return "float";
case CodeModel::Type::BYTE:
return "uint8_t";
case CodeModel::Type::SET:
return "_Set";
case CodeModel::Type::STRING:
return "_ValArray<char>";
case CodeModel::Type::NIL:
return "void*";
default:
break;
}
Q_ASSERT( false );
return QString();
}
void CppGen::emitType(const CodeModel::Unit* ds,const CodeModel::Type* t, QTextStream& out, int level )
{
if( t != 0 )
{
if( t->isBasicType() )
out << basicType(t);
else if( t->d_kind == CodeModel::Type::TypeRef )
{
const CodeModel::Type* b = t->d_type;
if( b && b->isBasicType() )
out << basicType(b);
else
{
CodeModel::Quali q = d_mdl->derefQualident( ds, t->d_st );
if( q.second.first )
{
if( q.first.first )
out << escape(q.first.first->d_name) << "::";
if( q.second.first )
out << escape(q.second.first->d_name);
}else
out << "Unknown";
}
}else if( t->d_kind == CodeModel::Type::Array )
{
if( t->d_type != 0 )
{
Q_ASSERT( t->d_type->d_name.isEmpty() );
if( t && ( t->d_type->d_kind == CodeModel::Type::TypeRef || t->d_type->d_kind == CodeModel::Type::Array ) )
{
out << "_FxArray<";
emitType(ds, t->d_type, out, level );
}else
{
// qDebug() << "Array Type" << SynTree::rToStr(t->d_type->d_def->d_tok.d_type);
// Erzeuge Namen und füge Type Decl ein
const QByteArray name = "_Type" + QByteArray::number(d_nameNr++);
out << "_FxArray<";
out << name;
}
}else
out << "_FxArray<Unknown";
if( t->d_st )
{
out << ",";
emitExpression(ds,t->d_st,out,level);
}else
out << ",0";
// if( t->d_type && t->d_type->d_kind == CodeModel::Type::Array )
// out << " ";
out << ">";
}else if( t->d_kind == CodeModel::Type::Record )
emitRecDecl(ds,t,QByteArray(),out,level);
else if( t->d_kind == CodeModel::Type::Pointer )
{
emitType(ds,t->d_type,out,level);
out << "*";
}
else if( t->d_kind == CodeModel::Type::ProcRef )
out << "/* ProcType not supported here */";
else
out << "int /* unknown type */";
}else
out << "int /* unknown type */";
}
void CppGen::emitProcType(const CodeModel::Unit* ds, const CodeModel::Type* p, const QByteArray& name, QTextStream& out, int level)
{
Q_ASSERT( p->d_kind == CodeModel::Type::ProcRef );
if( p->d_type == 0 )
out << "void ";
else
{
emitType(ds,p->d_type,out,level);
out << " ";
}
out << "(*" << name << ")(";
CodeModel::Type::Vals::const_iterator i;
for( i = p->d_vals.begin(); i != p->d_vals.end(); ++i )
{
if( i != p->d_vals.begin() )
out << ",";
const CodeModel::Element* par = i.value();
emitType(ds,par->d_type,out,level);
if( par->d_var )
out << "&";
}
out << ")";
}
void CppGen::emitFactor(const CodeModel::Unit* ds,const SynTree* st, QTextStream& out, int level )
{
Q_ASSERT( st != 0 && st->d_tok.d_type == SynTree::R_factor && !st->d_children.isEmpty() );
const SynTree* first = st->d_children.first();
switch( first->d_tok.d_type )
{
case SynTree::R_literal:
emitLiteral(ds,first,out, level);
break;
case Tok_Lpar:
out << "(";
Q_ASSERT(st->d_children.size() == 3);
emitExpression(ds,st->d_children[1],out,level);
out << ")";
break;
case Tok_Tilde:
out << "!";
Q_ASSERT(st->d_children.size() == 2 );
emitFactor(ds,st->d_children[1], out, level );
break;
case SynTree::R_variableOrFunctionCall:
emitDesig(ds,first->d_children.first(), false, out,level);
break;
default:
Q_ASSERT( false );
break;
}
}
void CppGen::emitLiteral(const CodeModel::Unit* ds,const SynTree* st, QTextStream& out, int level )
{
Q_ASSERT( st != 0 && st->d_tok.d_type == SynTree::R_literal && !st->d_children.isEmpty() );
const SynTree* first = st->d_children.first();
switch( first->d_tok.d_type )
{
case SynTree::R_set:
emitSet(ds,first,out, level);
break;
case SynTree::R_number:
Q_ASSERT( !st->d_children.first()->d_children.isEmpty() );
if( st->d_children.first()->d_children.first()->d_tok.d_val.endsWith('H') )
out << "0x" << st->d_children.first()->d_children.first()->d_tok.d_val.left(
st->d_children.first()->d_children.first()->d_tok.d_val.size() - 1 );
else
out << st->d_children.first()->d_children.first()->d_tok.d_val;
break;
#ifndef OB_BBOX
case Tok_TRUE:
out << "true";
break;
case Tok_FALSE:
out << "false";
break;
#endif
case Tok_NIL:
out << "0";
break;
case Tok_string:
if( first->d_tok.d_val.size() == 3 )
out << "'" << ( first->d_tok.d_val[1] == '\'' ? "\\" : "" ) << first->d_tok.d_val[1] << "'"; // CHAR
else
out << first->d_tok.d_val;
break;
case Tok_hexchar:
out << "0x" << first->d_tok.d_val.left(first->d_tok.d_val.size() - 1 );
break;
case Tok_hexstring:
out << "\"" << first->d_tok.d_val << "\"";
break;
default:
Q_ASSERT( false );
break;
}
}
bool CppGen::emitDesig(const CodeModel::Unit* ds, const SynTree* st, bool procCall, QTextStream& out, int level)
{
Q_ASSERT( st != 0 && st->d_tok.d_type == SynTree::R_designator );
CodeModel::DesigOpList dopl = d_mdl->derefDesignator(ds,st);
bool printedSomething = false;
bool lastIsPointer = false;
for( int i = 0; i < dopl.size(); i++ )
{
switch( dopl[i].d_op )
{
case CodeModel::IdentOp:
if( dopl[i].d_sym == 0 )
out << "/* ERROR: emitDesig: ident with no symbol: " << dopl[i].d_arg->d_tok.d_val << " */";
if( i == 0 && dynamic_cast<const CodeModel::Module*>(dopl[i].d_sym) )
{
out << escape(dopl[i].d_sym->d_name) + "::_inst()";
lastIsPointer = true;
printedSomething = true;
}else
{
const CodeModel::Element* e = dynamic_cast<const CodeModel::Element*>( dopl[i].d_sym );
if( e && e->isPredefProc() )
{
if( emitPredefProc( ds, dopl, out, level ) )
return true;
else
out << escape(e->d_name);
}else
{
if( i != 0 )
{
if( lastIsPointer )
out << "->";
else
out << ".";
lastIsPointer = false;
}
if( i == 0 && dynamic_cast<const CodeModel::Module*>(ds) == 0 // wir sind also nicht im Constructor
&& dopl[i].d_sym &&
dynamic_cast<const CodeModel::Module*>(dopl[i].d_sym->d_scope) != 0 // es ist also eine Modulvariable
)
out << "_this->";
if( dopl[i].d_sym )
out << escape(dopl[i].d_sym->d_name);
else
out << "???";
if( e && e->d_kind == CodeModel::Element::Variable )
{
const CodeModel::Type* t = derefed(e->d_type);
lastIsPointer = ( t != 0 && t->d_kind == CodeModel::Type::Pointer );
}
}
}
break;
case CodeModel::PointerOp:
lastIsPointer = true;
break;
case CodeModel::TypeOp:
{
if( lastIsPointer )
out << "->";
else
out << ".";
out << "_to<" << quali(dopl[i].d_arg) << ">()";
lastIsPointer = false;
const CodeModel::Type* t = derefed(dynamic_cast<const CodeModel::Type*>(dopl[i].d_sym));
if( t && t->d_kind == CodeModel::Type::Pointer )
lastIsPointer = true;
}
break;
case CodeModel::ProcedureOp:
out << "(";
if( dopl[i].d_arg )
{
Q_ASSERT( dopl[i].d_arg->d_tok.d_type == SynTree::R_ExpList );
for( int j = 0; j < dopl[i].d_arg->d_children.size(); j++ )
{
if( j != 0 )
out << ", ";
emitExpression(ds, dopl[i].d_arg->d_children[j], out, 0 );
}
}
out << ")";
break;
case CodeModel::ArrayOp:
Q_ASSERT( dopl[i].d_arg->d_tok.d_type == SynTree::R_ExpList );
for( int j = 0; j < dopl[i].d_arg->d_children.size(); j++ )
{
out << "[";
emitExpression(ds, dopl[i].d_arg->d_children[j], out, 0 );
out << "]"; // TODO: check for pointers?
}
break;
default:
break;
}
}
if( procCall && !dopl.isEmpty() && dopl.last().d_op != CodeModel::ProcedureOp )
{
bool isCallWithoutParams = false;
if( const CodeModel::Element* e = dynamic_cast<const CodeModel::Element*>(dopl.last().d_sym) )
{
isCallWithoutParams = ( e->d_kind == CodeModel::Element::StubProc ) ||
( e->d_type && e->d_type->d_kind == CodeModel::Type::ProcRef );
}else if( const CodeModel::Procedure* p = dynamic_cast<const CodeModel::Procedure*>(dopl.last().d_sym) )
isCallWithoutParams = true;
else if( const CodeModel::Type* t = dynamic_cast<const CodeModel::Type*>(dopl.last().d_sym) )
isCallWithoutParams = t->d_kind == CodeModel::Type::ProcRef;
if( isCallWithoutParams )
out << "()";
}
return printedSomething;
}
void CppGen::emitTypeDecl(const CodeModel::Unit* ds, const CodeModel::Type* t, QTextStream& out, int level)
{
Q_ASSERT( !t->d_name.isEmpty() );
out << ws(level);
if( t->d_kind == CodeModel::Type::Record )
{
emitRecDecl(ds,t,escape(t->d_name),out,level);
out << ";" << endl;
}else
{
out << "typedef ";
emitType( ds, t, out, level );
out << " " << escape(t->d_name) << ";" << endl;
}
}
void CppGen::emitVarDecl(const CodeModel::Unit* ds, const CodeModel::Element* v, QTextStream& out, int level)
{
// auch Unknowns kommen hier an Q_ASSERT( v->d_kind == CodeModel::Element::Variable );
out << ws(level);
if( v->d_type && v->d_type->d_kind == CodeModel::Type::ProcRef )
{
emitProcType(ds,v->d_type,escape(v->d_name),out,level);
out << ";" << endl;
}else
{
emitType( ds, v->d_type, out, level );
out << " " << escape(v->d_name) << ";" << endl;
}
}
void CppGen::emitStubProcDecl(const CodeModel::Unit* ds, const CodeModel::Element* v, QTextStream& out, int level)
{
Q_ASSERT( v->d_kind == CodeModel::Element::StubProc );
out << ws(level);
if( v->d_type == 0 )
out << "static void ";
else
{
emitType(ds,v->d_type,out,level);
out << " ";
}
out << escape(v->d_name);
emitProcParams( ds, v->d_vals, out );
out << ";" << endl;
}
void CppGen::emitRecDecl(const CodeModel::Unit* ds, const CodeModel::Type* r, const QByteArray& name,
QTextStream& out, int level)
{
Q_ASSERT( r->d_kind == CodeModel::Type::Record );
out << "struct " << name << ( name.isEmpty() ? "" : " " );
out << ": public ";
if( r->d_type )
emitType(ds,r->d_type,out,level);
else
out << "_Root";
out << " ";
out << "{" << endl;
foreach( const CodeModel::Element* v, r->d_vals )
{
emitVarDecl(ds,v,out,level+1);
}
out << ws(level) << "}";
}
void CppGen::emitProcDecl(const CodeModel::Procedure* p, QTextStream& out, int level)
{
out << ws(level);
if( p->d_type == 0 )
out << "static void ";
else
{
emitType(p,p->d_type,out,level);
out << " ";
}
out << escape(p->d_name);
emitProcParams(p, p->d_vals, out );
out << ";" << endl;
}
void CppGen::emitProcParams( const CodeModel::Unit* ds, const QList<CodeModel::Element*>& params, QTextStream& out)
{
out << "(";
for( int i = 0; i < params.size(); i++ )
{
if( i != 0 )
out << ", ";
const CodeModel::Element* par = params[i];
const CodeModel::Type* t = derefed(par->d_type);
if( t && t->d_kind == CodeModel::Type::Array )
{
if( par->d_var )
out << "_VarArray<";
else
out << "_ValArray<";
emitType(ds, t->d_type, out, 0 );
out << ">";
}else
{
const bool isSimple = isSimpleType( par->d_type );
if( !par->d_var && !isSimple )
out << "const ";
emitType(ds,par->d_type,out,0);
if( par->d_var || !isSimple )
out << "&";
}
out << " " << escape(par->d_name);
}
out << ")";
}
void CppGen::emitProcBody(const CodeModel::Procedure* p, QTextStream& out)
{
const CodeModel::Module* m = p->getModule();
Q_ASSERT( m != 0 );
emitComment(p->d_def,out,0);
if( p->d_type == 0 )
out << "void ";
else
{
// Return kann nur ein Qualident sein
Q_ASSERT( p->d_type->d_kind == CodeModel::Type::TypeRef && p->d_type->d_st != 0 );
// Hier einfach den Modulnamen vorstellen, falls d_type nicht bereits ein zweiteiliger Qualident ist
const CodeModel::Type* der = p->d_type->deref();
if( p->d_type->d_st->d_children.size() == 1 && der && !der->isBasicType() )
out << escape(p->d_scope->d_name) << "::";
emitType(p,p->d_type,out,0);
out << " ";
}
out << escape(m->d_name) << "::" << escape(p->d_name);
emitProcParams(p, p->d_vals, out );
out << endl << "{" << endl;
emitDecls(p,out,1);
if( !p->d_body.isEmpty() )
{
out << ws(1) << "// BEGIN" << endl;
out << ws(1) << escape(m->d_name) << "* _this = _inst();" << endl;
}
emitStatementSeq(p,p->d_body,out,1);
if( !p->d_body.isEmpty() )
out << ws(1) << "// END" << endl;
out << "}" << endl << endl;
}
void CppGen::emitDecls(const CodeModel::Unit* ds, QTextStream& out, int l)
{
QList<CodeModel::Element*> consts = ds->getConsts();
if( !consts.isEmpty() )
out << ws(l) << "// CONST" << endl;
foreach( const CodeModel::Element* c, consts )
{
emitComment( c->d_def, out,l );
out << ws(l) << "static const ";
const CodeModel::Type* type = d_mdl->typeOfExpression(ds,c->d_st);
if( type == 0 )
type = d_mdl->typeOfExpression(ds,c->d_st);
emitType( ds, type, out, l );
out << " " << escape(c->d_name) << " = ";
emitExpression( ds, c->d_st, out, l );
out << ";" << endl;
}
if( !consts.isEmpty() )
out << endl;
QList<CodeModel::Type*> namedTypes = ds->getNamedTypes();
if( !namedTypes.isEmpty() )
out << ws(l) << "// TYPE" << endl;
bool hasForwards = false;
foreach( const CodeModel::Type* t, namedTypes )
{
// forward declarations because of typedef pointer to record
if( t->d_kind == CodeModel::Type::Record )
{
out << ws(l) << "struct " << escape(t->d_name) << ";" << endl;
hasForwards = true;
}
}
if( hasForwards )
out << endl;
foreach( const CodeModel::Type* t, namedTypes )
{
emitComment( t->d_def, out,l );
emitTypeDecl(ds,t,out,l);
}
if( !namedTypes.isEmpty() )
out << endl;
QList<CodeModel::Element*> vars = ds->getVars();
if( !vars.isEmpty() )
out << ws(l) << "// VAR" << endl;
foreach( const CodeModel::Element* v, vars )
{
emitComment( v->d_def, out,l );
emitVarDecl(ds,v,out,l);
}
QList<CodeModel::Element*> uknw = ds->getUnknowns();
foreach( const CodeModel::Element* v, uknw )
{
emitVarDecl(ds,v,out,l);
}
if( !vars.isEmpty() )
out << endl;
foreach( const CodeModel::Element* v, ds->getStubProcs() )
{
emitStubProcDecl(ds,v,out,l);
}
}
void CppGen::emitStatementSeq(const CodeModel::Unit* ds, const QList<SynTree*>& seq, QTextStream& out, int level)
{
int count = 0;
foreach( const SynTree* s, seq )
{
if( s->d_tok.d_type == SynTree::R_statement )
{
Q_ASSERT( s->d_children.size() <= 1 );
if( s->d_children.isEmpty() )
continue;
else
s = s->d_children.first();
}
emitComment(s,out,level);
count++;
switch( s->d_tok.d_type )
{
case SynTree::R_assignmentOrProcedureCall:
Q_ASSERT( false ); // wurde bereits vorher korrigiert
break;
case SynTree::R_assignment_:
out << ws(level);
emitDesig(ds, s->d_children.first(), false, out, level);
out << " = ";
emitExpression(ds,s->d_children.last(), out, level );
out << ";" << endl;
break;
case SynTree::R_ProcedureCall_:
out << ws(level);
emitDesig(ds, s->d_children.first(), true, out, level);
out << ";" << endl;
break;
case SynTree::R_IfStatement:
emitIfStatement(ds, s, out, level );
break;
case SynTree::R_CaseStatement:
emitCaseStatement(ds,s,out,level);
break;
case SynTree::R_WhileStatement:
emitWhileStatement(ds,s,out,level);
break;
case SynTree::R_RepeatStatement:
emitRepeatStatement(ds,s,out,level);
break;
case SynTree::R_ForStatement:
emitForStatement(ds,s,out,level);
break;
case SynTree::R_ReturnStatement:
out << ws(level) << "return ";
if( s->d_children.size() == 2 && s->d_children.last()->d_tok.d_type == SynTree::R_expression )
emitExpression(ds, s->d_children.last(), out, level );
else
out << "/* ERROR: invalid return expression */";
out << ";" << endl;
break;
default:
out << ws(level) << "; // unknown statement " << SynTree::rToStr(s->d_tok.d_type) << endl;
warning( Errors::Generator, s,
tr("'%1' not yet supported").arg(SynTree::rToStr(s->d_tok.d_type)) );
break;
}
}
if( count == 0 )
{
out << ws(level) << "; // empty statement" << endl;
}
}
bool CppGen::emitPredefProc(const CodeModel::Unit* ds, const CodeModel::DesigOpList& dopl, QTextStream& out, int level)
{
Q_ASSERT( !dopl.isEmpty() );
const CodeModel::Element* pp = dopl.first().d_sym->to<CodeModel::Element>();
Q_ASSERT( pp != 0 && pp->isPredefProc() );
if( dopl.size() != 2 || dopl.last().d_op != CodeModel::ProcedureOp )
{
return error( Errors::Semantics, dopl.first().d_arg, tr("invalid call of built-in procedure '%1'").
arg(dopl.first().d_sym->d_name.data()) );
}
Q_ASSERT( dopl.last().d_arg->d_tok.d_type == SynTree::R_ExpList );
QList<SynTree*> args = dopl.last().d_arg->d_children;
switch( pp->d_kind )
{
case CodeModel::Element::NEW:
{
const SynTree* desig = ( args.isEmpty() ? 0 : CodeModel::flatten(args.first(), SynTree::R_designator ) );
if( args.size() != 1 || desig == 0 )
{
return error( Errors::Semantics, dopl.last().d_arg, tr("invalid arguments of 'NEW()'") );
}
CodeModel::DesigOpList arg = d_mdl->derefDesignator( ds, desig );
const CodeModel::Element* id = 0;
const CodeModel::Type* ptr = 0;
const CodeModel::Type* rec = 0;
if( arg.isEmpty() || arg.last().d_op != CodeModel::IdentOp ||
( id = arg.last().d_sym->to<CodeModel::Element>() ) == 0 ||
( ptr = derefed( id->d_type ) ) == 0 || ptr->d_kind != CodeModel::Type::Pointer ||
( rec = derefed( ptr->d_type ) ) == 0 || rec->d_kind != CodeModel::Type::Record )
{
error( Errors::Semantics, dopl.last().d_arg, tr("'NEW()' expects a POINTER to RECORD") );
return false;
}
emitDesig(ds, desig, false, out, level );
out << " = new ";
emitScopedName( ds, rec, out );
out << "()";
// if( rec->d_scope != ds )
// out << escape(rec->d_scope->d_name) << "::";
// out << escape(rec->d_name) << "()";
return true;
}
break;
case CodeModel::Element::INC:
if( args.size() == 1 )
{
emitExpression( ds, args.first(), out , level );
out << "++";
return true;
}else if( args.size() == 2 )
{
emitExpression( ds, args.first(), out , level );
out << " += ";
emitExpression( ds, args.last(), out , level );
return true;
}
error( Errors::Semantics, pp->d_def, tr("'INC()' with invalid arguments") );
break;
case CodeModel::Element::DEC:
if( args.size() == 1 )
{
emitExpression( ds, args.first(), out , level );
out << "--";
return true;
}else if( args.size() == 2 )
{
emitExpression( ds, args.first(), out , level );
out << " -= ";
emitExpression( ds, args.last(), out , level );
return true;
}
error( Errors::Semantics, dopl.last().d_arg, tr("'DEC()' with invalid arguments") );
break;
case CodeModel::Element::ORD:
if( args.size() == 1 )
{
const CodeModel::Type* t = d_mdl->typeOfExpression(ds, args.first() );
if( t == d_mdl->getGlobalScope().d_setType )
{
out << "( ";
emitExpression(ds, args.first(), out, level );
out << " ).to_ulong()";
return true;
}else
{
out << "int( ";
emitExpression(ds, args.first(), out, level );
out << " )";
return true;
}
}
error( Errors::Semantics, dopl.last().d_arg, tr("'ORD()' with invalid arguments") );
break;
case CodeModel::Element::CHR:
if( args.size() == 1 )
{
out << "char( ";
emitExpression(ds, args.first(), out, level );
out << " )";
return true;
}
error( Errors::Semantics, dopl.last().d_arg, tr("'CHR()' with invalid arguments") );
break;
case CodeModel::Element::ODD:
if( args.size() == 1 )
{
emitExpression(ds, args.first(), out, level );
out << " % 2 == 1";
return true;
}
error( Errors::Semantics, dopl.last().d_arg, tr("'ODD()' with invalid arguments") );
break;
default:
warning( Errors::Generator, dopl.last().d_arg,
tr("built-in '%1()' not yet supported").arg(pp->d_name.data()) );
break;
}
return false;
}
static inline bool ifNeedsBlock( SynTree* stats )
{
Q_ASSERT( stats->d_tok.d_type == SynTree::R_StatementSequence );
if( stats->d_children.isEmpty() )
return false;
SynTree* stat = stats->d_children.first();
Q_ASSERT( stat->d_tok.d_type == SynTree::R_statement );
if( stat->d_children.isEmpty() )
return false;
const int t = stat->d_children.first()->d_tok.d_type;
if( t == SynTree::R_IfStatement || t == SynTree::R_CaseStatement )
return true;
else
return stats->d_children.size() > 1;
}
void CppGen::emitIfStatement(const CodeModel::Unit* ds, const SynTree* st, QTextStream& out, int level)
{
Q_ASSERT( st != 0 && st->d_tok.d_type == SynTree::R_IfStatement && st->d_children.size() >= 4 &&
st->d_children[1]->d_tok.d_type == SynTree::R_expression &&
st->d_children[3]->d_tok.d_type == SynTree::R_StatementSequence );
out << ws(level) << "if( ";
emitExpression(ds,st->d_children[1],out,level);
out << " )" << endl;
SynTree* stats = st->d_children[3];
bool block = ifNeedsBlock(stats);
if( block )
out << ws(level) << "{" << endl;
emitStatementSeq(ds, stats->d_children, out, level + 1);
out << ws(level);
if( block )
out << "}";
for( int i = 4; i < st->d_children.size(); i++ )
{
if( st->d_children[i]->d_tok.d_type == SynTree::R_ElsifStatement )
{
SynTree* elif = st->d_children[i];
Q_ASSERT( elif->d_children.size() == 4 && elif->d_children[1]->d_tok.d_type == SynTree::R_expression &&
elif->d_children[3]->d_tok.d_type == SynTree::R_StatementSequence );
out << "else if( ";
emitExpression(ds,elif->d_children[1],out,level);
out << " )" << endl;
SynTree* stats = elif->d_children[3];
block = ifNeedsBlock(stats);