/**
* Evaluate the dynamic content of the one-offset index variables.
*/
std::vector< RevPtr<Variable> > SyntaxVariable::computeDynamicIndex( Environment& env )
{
std::vector< RevPtr<Variable> > indexVars;
std::list<SyntaxElement*>::const_iterator it;
for ( it = index->begin(); it != index->end(); ++it )
{
RevPtr<Variable> theIndex = ( *it )->evaluateDynamicContent( env );
// We ensure that the variables are of type Natural or can be converted to Natural numbers.
// No sense in checking indices against permissible range here; errors are thrown later by
// the container or member object if we are out of range.
if ( !theIndex->getRevObject().isTypeSpec( Natural::getClassTypeSpec() ) )
{
if( theIndex->getRevObject().isConstant() && theIndex->getRevObject().isConvertibleTo( Natural::getClassTypeSpec(), true ) &&
Natural::getClassTypeSpec().isDerivedOf( theIndex->getRevObjectTypeSpec() ) )
{
// Type promotion
theIndex->setRevObject( theIndex->getRevObject().convertTo( Natural::getClassTypeSpec() ) );
theIndex->setRevObjectTypeSpec( Natural::getClassTypeSpec() );
}
else if ( theIndex->getRevObject().isConvertibleTo( Natural::getClassTypeSpec(), false ) )
{
// Dynamic type conversion
ConverterNode<Natural>* converterNode = new ConverterNode<Natural>( "", theIndex, Natural::getClassTypeSpec() );
theIndex = new Variable( new Natural( converterNode ) );
}
else
{
throw RbException( "No known conversion of type '" + theIndex->getRevObject().getType() + "' to 'Natural', required for index");
}
}
indexVars.push_back( theIndex );
}
return indexVars;
}
/**
* Test if argument is valid. The boolean flag 'once' is used to signal whether the argument matching
* is done in a static or a dynamic context. If the rule is constant, then the argument matching
* is done in a static context (evaluate-x§once context) regardless of the setting of the once flag.
* If the argument is constant, we try type promotion if permitted by the variable required type.
*
* @todo See the TODOs for fitArgument(...)
*/
bool ArgumentRule::isArgumentValid(const RevPtr<const Variable> &var, bool once) const
{
if ( var == NULL )
{
return false;
}
// TODO: Use this code when the constant flag in ArgumentRule is used correctly
// if ( isConstant() || !var->isAssignable() )
// if ( isConstant() )
if ( evalType == BY_VALUE )
{
once = true;
}
for ( std::vector<TypeSpec>::const_iterator it = argTypeSpecs.begin(); it != argTypeSpecs.end(); ++it )
{
if ( var->getRevObject().isTypeSpec( *it ) )
{
return true;
}
else if ( var->getRevObject().isConvertibleTo( *it, once ) )
{
return true;
}
else if ( once == false && !var->isAssignable() &&
var->getRevObject().isConvertibleTo( *it, true ) &&
(*it).isDerivedOf( var->getRevObjectTypeSpec() )
)
{
return true;
}
}
return false;
}
/**
* Fit a variable into an argument according to the argument rule. If necessary and
* appropriate, we do type conversion or type promotion.
*
* @todo The constant flag is currently not used correctly in ArgumentRule. Therefore,
* we ignore it here for now. This needs to be changed.
*
* @todo We need to check whether workspace objects with member variables are
* modifiable by the user.
*
* @todo To conform to the old code we change the required type of the incoming
* variable wrapper here. We need to change this so that we do not change
* the wrapper here, but make sure that if the argument variable is inserted
* in a member variable or container element slot, that the slot variable
* wrapper, which should be unique (not the same as the incoming variable
* wrapper), has the right required type.
*/
Argument ArgumentRule::fitArgument( Argument& arg, bool once ) const
{
// TODO: Use this code when the constant flag in ArgumentRule is used correctly
// if ( isConstant() || !theVar->isAssignable() )
if ( evalType == BY_VALUE )
{
once = true;
}
RevPtr<Variable> theVar = arg.getVariable();
for ( std::vector<TypeSpec>::const_iterator it = argTypeSpecs.begin(); it != argTypeSpecs.end(); ++it )
{
if ( theVar->getRevObject().isTypeSpec( *it ) )
{
// For now, change the required type of the incoming variable wrapper
theVar->setRevObjectTypeSpec( *it );
if ( !isEllipsis() )
return Argument( theVar, getArgumentLabel(), evalType == BY_CONSTANT_REFERENCE );
else
return Argument( theVar, arg.getLabel(), true );
}
else if ( once == false &&
!theVar->isAssignable() &&
theVar->getRevObject().isConvertibleTo( *it, true ) &&
(*it).isDerivedOf( theVar->getRevObjectTypeSpec() )
)
{
// Fit by type promotion. For now, we also modify the type of the incoming variable wrapper.
RevObject* convertedObject = theVar->getRevObject().convertTo( *it );
theVar->setRevObject( convertedObject );
theVar->setRevObjectTypeSpec( *it );
if ( !isEllipsis() )
return Argument( theVar, getArgumentLabel(), evalType == BY_CONSTANT_REFERENCE );
else
return Argument( theVar, arg.getLabel(), true );
}
else if ( theVar->getRevObject().isConvertibleTo( *it, once ) )
{
// Fit by type conversion
if ( once || !theVar->getRevObject().hasDagNode() )
{
RevObject* convertedObject = theVar->getRevObject().convertTo( *it );
Variable* convertedVar = new Variable( convertedObject );
convertedVar->setRevObjectTypeSpec( *it );
if ( !isEllipsis() )
return Argument( convertedVar, getArgumentLabel(), evalType == BY_CONSTANT_REFERENCE );
else
return Argument( convertedVar, arg.getLabel(), true );
}
else
{
RevObject* conversionObject = theVar->getRevObject().convertTo( *it );
conversionObject->makeConversionValue( theVar );
Variable* conversionVar = new Variable( conversionObject );
conversionVar->setRevObjectTypeSpec( *it );
if ( !isEllipsis() )
return Argument( conversionVar, getArgumentLabel(), evalType == BY_CONSTANT_REFERENCE );
else
return Argument( conversionVar, arg.getLabel(), true );
}
}
}
throw RbException( "Argument type mismatch fitting a " + theVar->getRevObject().getType() + " argument to formal " +
getArgumentTypeSpec()[0].getType() + " " + getArgumentLabel() );
}
