private bool WriteCast(CCodeWriterBase c, out bool parenthesis)
{
parenthesis = false;
switch (this.ConversionKind)
{
case ConversionKind.MethodGroup:
var newDelegate = new DelegateCreationExpression {
Type = Type, MethodOwner = MethodOwner
};
newDelegate.Arguments.Add(this.Operand);
newDelegate.WriteTo(c);
return(false);
case ConversionKind.NullToPointer:
// The null pointer is represented as 0u.
c.TextSpan("(");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(")");
c.TextSpan("nullptr");
return(false);
case ConversionKind.Boxing:
c.TextSpan("__box");
if (Cs2CGenerator.DebugOutput)
{
c.TextSpan("_debug");
}
break;
case ConversionKind.Unboxing:
c.TextSpan("__unbox<");
c.WriteType(Type, true, false, true, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
break;
case ConversionKind.ExplicitReference:
case ConversionKind.ImplicitReference:
if (Type.TypeKind == TypeKind.TypeParameter)
{
c.TextSpan("cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
else if (Type.TypeKind == TypeKind.Interface && this.TypeSource.AllInterfaces.Contains((INamedTypeSymbol)Type))
{
c.TextSpan("interface_cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
else if (Type.TypeKind == TypeKind.Interface)
{
c.TextSpan("dynamic_interface_cast_or_throw<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
else if (this.TypeSource.IsDerivedFrom(Type))
{
c.TextSpan("static_cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
else if (this.TypeSource.TypeKind == TypeKind.Interface && Type.SpecialType == SpecialType.System_Object)
{
c.TextSpan("object_cast");
}
else if (this.TypeSource.TypeKind == TypeKind.Array && Type.TypeKind == TypeKind.Array)
{
c.TextSpan("reinterpret_cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
else
{
c.TextSpan("cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
}
break;
case ConversionKind.PointerToInteger:
case ConversionKind.IntegerToPointer:
case ConversionKind.PointerToPointer:
if (!Type.IsIntPtrType())
{
c.TextSpan("(");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(")");
parenthesis = true;
}
break;
case ConversionKind.Identity:
// for string
if (this.TypeSource.SpecialType == SpecialType.System_String && Type.TypeKind == TypeKind.Pointer)
{
c.TextSpan("&");
this.Operand.WriteTo(c);
c.TextSpan("->m_firstChar");
return(false);
}
return(true);
default:
if (this.Checked)
{
c.TextSpan("checked_");
}
c.TextSpan("static_cast<");
c.WriteType(Type, containingNamespace: MethodOwner?.ContainingNamespace);
c.TextSpan(">");
break;
}
return(true);
}
