public static void Go(OutputWriter writer, CastExpressionSyntax expression)
{
var symbol = TypeProcessor.GetSymbolInfo(expression);
var castingFrom = TypeProcessor.GetTypeInfo(expression.Expression).Type ??
TypeProcessor.GetTypeInfo(expression).Type;
var srcTypeDlang = TypeProcessor.ConvertType(castingFrom);
var destType = TypeProcessor.GetTypeInfo(expression.Type).Type;
var destTypeDlang = TypeProcessor.TryConvertType(expression.Type);
if (destTypeDlang == srcTypeDlang)
{
Core.Write(writer, expression.Expression);
}
else
//if (symbol.Symbol != null)// && srcTypeCpp != "int" && srcTypeCpp != "System.String" && srcTypeCpp != "bool")
{
// if (castingFrom != destType) // Check for implicit first then explicit
bool useType = true;
//We should start with exact converters and then move to more generic convertors i.e. base class or integers which are implicitly convertible
var correctConverter = destType.GetImplicitCoversionOp(destType, castingFrom, true);
// initializerType.Type.GetMembers("op_Implicit").OfType<IMethodSymbol>().FirstOrDefault(h => h.ReturnType == initializerType.Type && h.Parameters[0].Type == initializerType.ConvertedType);
if (correctConverter == null)
{
useType = false;
correctConverter =
castingFrom.GetImplicitCoversionOp(destType, castingFrom, true);
//.GetMembers("op_Implicit").OfType<IMethodSymbol>().FirstOrDefault(h => h.ReturnType == initializerType.Type && h.Parameters[0].Type == initializerType.ConvertedType);
}
if (correctConverter != null)
{
// Core.Write(writer, expression.Left);
// writer.Write(" = ");
if (correctConverter.ReturnType != destType)
{
writer.Write("Cast!(" + destTypeDlang + (destType.IsValueType ? "" : "") + ")(");
}
if (castingFrom.SpecialType == SpecialType.System_Decimal && destType.IsPrimitiveInteger())
{
}
else
{
if (useType)
{
writer.Write(TypeProcessor.ConvertType(destType) + "." + "op_Implicit_" +
TypeProcessor.ConvertType(correctConverter.ReturnType, false, true, false).Replace(".", "_"));
}
else
{
writer.Write(TypeProcessor.ConvertType(castingFrom) + "." + "op_Implicit_" +
TypeProcessor.ConvertType(correctConverter.ReturnType, false, true, false).Replace(".", "_"));
}
}
writer.Write("(");
Core.Write(writer, expression.Expression);
writer.Write(")");
if (correctConverter.ReturnType != destType)
{
writer.Write(")");
}
return;
}
useType = true;
//We should start with exact converters and then move to more generic convertors i.e. base class or integers which are implicitly convertible
correctConverter = destType.GetExplictCoversionOp(destType, castingFrom, true);
// initializerType.Type.GetMembers("op_Implicit").OfType<IMethodSymbol>().FirstOrDefault(h => h.ReturnType == initializerType.Type && h.Parameters[0].Type == initializerType.ConvertedType);
if (correctConverter == null)
{
useType = false;
correctConverter =
castingFrom.GetExplictCoversionOp(destType, castingFrom, true);
//.GetMembers("op_Implicit").OfType<IMethodSymbol>().FirstOrDefault(h => h.ReturnType == initializerType.Type && h.Parameters[0].Type == initializerType.ConvertedType);
}
if (correctConverter != null)
{
var iscast = correctConverter.ReturnType != destType;
if (iscast)
{
writer.Write("Cast!(" + destTypeDlang + ")(");
}
// Core.Write(writer, expression.Left);
// writer.Write(" = ");
if (castingFrom.SpecialType == SpecialType.System_Decimal && destType.IsPrimitiveInteger())
{
}
else
{
if (useType)
{
writer.Write(TypeProcessor.ConvertType(destType) + "." + "op_Explicit");
}
else
{
writer.Write(TypeProcessor.ConvertType(castingFrom) + "." + "op_Explicit");
}
}
writer.Write("(");
Core.Write(writer, expression.Expression);
writer.Write(")");
if (iscast)
{
writer.Write(")");
}
return;
}
if (TypeProcessor.IsPrimitiveType(srcTypeDlang) && TypeProcessor.IsPrimitiveType(destTypeDlang))
{//primitives can be directly cast
writer.Write("cast(" + destTypeDlang + ")");
Core.Write(writer, expression.Expression);
}
else
{
var convertedType = TypeProcessor.GetTypeInfo(expression).Type;
var type = TypeProcessor.GetTypeInfo(expression.Expression).Type;
if (type.IsValueType && !convertedType.IsValueType)
{
//We have to box then cast if not Object
if (destType.Name != "Object")
{
writer.Write("Cast!(" + destTypeDlang + ")(");
}
//Box
writer.Write("BOX!(" + TypeProcessor.ConvertType(type) + ")(");
//When passing an argument by ref or out, leave off the .Value suffix
// writer.Write(" >(");
Core.Write(writer, expression.Expression);
writer.Write(")");
if (destType.Name != "Object")
{
writer.Write(")");
}
}
else if (!type.IsValueType && convertedType.IsValueType)
{
//UnBox
// writer.Write("(Cast!( Boxed!(" + TypeProcessor.ConvertType(convertedType) + ") )(");
// Core.Write(writer, expression.Expression);
// writer.Write(")).Value");
writer.Write("UNBOX!(" + TypeProcessor.ConvertType(convertedType) + ")(");
Core.Write(writer, expression.Expression);
writer.Write(")");
}
else if (type.IsValueType && convertedType.IsValueType)
{
if (convertedType.TypeKind == TypeKind.Pointer)
{
//cannot use ascast here, its for boxed types and objects
writer.Write("cast(" + destTypeDlang + (destType.IsValueType ? "" : "") + ")(");
Core.Write(writer, expression.Expression);
writer.Write(")");
}
else
{
//cannot use ascast here, its for boxed types and objects
writer.Write("Cast!(" + destTypeDlang + (destType.IsValueType ? "" : "") + ")(");
Core.Write(writer, expression.Expression);
writer.Write(")");
}
}
else
{
writer.Write("Cast!(");
writer.Write(destTypeDlang);
writer.Write(")(");
Core.Write(writer, expression.Expression);
writer.Write(")");
}
}
}
}