TypeSymbol EmitGetCurrentHelper(CodeGenerator cg)
{
var getter = _currentValue ?? _current;
Debug.Assert(getter != null);
var t = VariableReferenceExtensions.EmitLoadValue(cg, getter, _enumeratorLoc);
if (t.Is_PhpValue())
{
if (_aliasedValues) // current() may get PhpAlias wrapped in PhpValue, make it PhpAlias again so it is handled properly
{
// .EnsureAlias()
cg.EmitPhpValueAddr();
t = cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureAlias_PhpValueRef);
}
else
{
// .GetValue()
cg.EmitPhpValueAddr();
t = cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.GetValue);
}
}
if (_aliasedValueLoc != null && (TypeSymbol)_aliasedValueLoc.Type == t)
{
// <_aliasedValue> = <STACK>
cg.Builder.EmitOpCode(ILOpCode.Dup);
cg.Builder.EmitLocalStore(_aliasedValueLoc);
}
return(t);
}
internal void EmitIteratorNext(CodeGenerator cg)
{
if (_iterator_next != null)
{
// Template: Iterator.next()
cg.EmitPop(VariableReferenceExtensions.EmitLoadValue(cg, _iterator_next, _enumeratorLoc));
}
}
internal void EmitGetCurrent(CodeGenerator cg, BoundReferenceExpression valueVar, BoundReferenceExpression keyVar)
{
Debug.Assert(_enumeratorLoc.IsValid);
// NOTE: PHP writes first to {valueVar} then to {keyVar}
if (_currentValue != null && _currentKey != null)
{
// PhpArray enumerator or Iterator
cg.EmitSequencePoint(valueVar.PhpSyntax);
valueVar.BindPlace(cg).EmitStore(cg, () => EmitGetCurrentHelper(cg), valueVar.TargetAccess());
if (keyVar != null)
{
cg.EmitSequencePoint(keyVar.PhpSyntax);
keyVar.BindPlace(cg).EmitStore(cg, () => VariableReferenceExtensions.EmitLoadValue(cg, _currentKey, _enumeratorLoc), keyVar.TargetAccess());
}
}
else
{
if (_current == null)
{
throw Roslyn.Utilities.ExceptionUtilities.UnexpectedValue(_current);
}
var valuetype = _current.ReturnType;
// ValueTuple<T1, T2> (Item1, Item2)
// KeyValuePair<TKey, TValue> (Key, Value)
if (IsAPairValue(valuetype, out var skey, out var svalue))
{
// tmp = current;
var tmp = cg.GetTemporaryLocal(valuetype);
VariableReferenceExtensions.EmitLoadValue(cg, _current, _enumeratorLoc);
cg.Builder.EmitLocalStore(tmp);
var tmploc = new LocalPlace(tmp);
var keyplace = skey switch
{
FieldSymbol fld => (IPlace) new FieldPlace(tmploc, fld, cg.Module),
PropertySymbol prop => new PropertyPlace(tmploc, prop, cg.Module),
_ => throw Roslyn.Utilities.ExceptionUtilities.Unreachable,
};
var valueplace = svalue switch
{
FieldSymbol fld => (IPlace) new FieldPlace(tmploc, fld, cg.Module),
PropertySymbol prop => new PropertyPlace(tmploc, prop, cg.Module),
_ => throw Roslyn.Utilities.ExceptionUtilities.Unreachable,
};
// value = tmp.Item2;
cg.EmitSequencePoint(valueVar.PhpSyntax);
valueVar.BindPlace(cg).EmitStore(cg, valueplace, valueVar.TargetAccess());
// key = tmp.Item1;
if (keyVar != null)
{
cg.EmitSequencePoint(keyVar.PhpSyntax);
keyVar.BindPlace(cg).EmitStore(cg, keyplace, keyVar.TargetAccess());
}
//
cg.ReturnTemporaryLocal(tmp);
}
internal void EmitGetCurrent(CodeGenerator cg, BoundReferenceExpression valueVar, BoundReferenceExpression keyVar)
{
Debug.Assert(_enumeratorLoc.IsValid);
// NOTE: PHP writes first to {valueVar} then to {keyVar}
if (_currentValue != null && _currentKey != null)
{
// PhpArray enumerator or Iterator
cg.EmitSequencePoint(valueVar.PhpSyntax);
valueVar.BindPlace(cg).EmitStore(cg, () => EmitGetCurrentHelper(cg), valueVar.Access);
if (keyVar != null)
{
cg.EmitSequencePoint(keyVar.PhpSyntax);
keyVar.BindPlace(cg).EmitStore(cg, () => VariableReferenceExtensions.EmitLoadValue(cg, _currentKey, _enumeratorLoc), keyVar.Access);
}
}
else
{
Debug.Assert(_current != null);
var valuetype = _current.ReturnType;
// ValueTuple (key, value)
// TODO: KeyValuePair<key, value> // the same
if (valuetype.Name == "ValueTuple" && valuetype.IsValueType && ((NamedTypeSymbol)valuetype).Arity == 2)
{
// tmp = current;
var tmp = cg.GetTemporaryLocal(valuetype);
VariableReferenceExtensions.EmitLoadValue(cg, _current, _enumeratorLoc);
cg.Builder.EmitLocalStore(tmp);
// TODO: ValueTuple Helper
var item1 = valuetype.GetMembers("Item1").Single() as FieldSymbol;
var item2 = valuetype.GetMembers("Item2").Single() as FieldSymbol;
var item1place = new FieldPlace(new LocalPlace(tmp), item1, cg.Module);
var item2place = new FieldPlace(new LocalPlace(tmp), item2, cg.Module);
// value = tmp.Item2;
cg.EmitSequencePoint(valueVar.PhpSyntax);
valueVar.BindPlace(cg).EmitStore(cg, item2place, valueVar.Access);
// key = tmp.Item1;
if (keyVar != null)
{
cg.EmitSequencePoint(keyVar.PhpSyntax);
keyVar.BindPlace(cg).EmitStore(cg, item1place, keyVar.Access);
}
//
cg.ReturnTemporaryLocal(tmp);
}
// just a value
else
{
cg.EmitSequencePoint(valueVar.PhpSyntax);
valueVar.BindPlace(cg).EmitStore(cg, () => EmitGetCurrentHelper(cg), valueVar.Access);
if (keyVar != null)
{
throw new InvalidOperationException();
}
}
}
}