/// <summary>
/// Creates a new property in the target assembly, but doesn't set its accessors.
/// </summary>
/// <param name="targetType">Type of the target.</param>
/// <param name="yourProperty">Your property.</param>
/// <param name="newPropAttr">The new property attribute.</param>
/// <exception cref="PatchDeclerationException">Thrown if this member collides with another member, and the error cannot be resolved.</exception>
private NewMemberStatus CreateNewProperty(TypeDefinition targetType, PropertyDefinition yourProperty,
NewMemberAttribute newPropAttr)
{
if (newPropAttr.IsImplicit)
{
Log_implicitly_creating_member("property", yourProperty);
}
else
{
Log_creating_member("property", yourProperty);
}
var maybeDuplicate = targetType.GetProperty(yourProperty.Name,
yourProperty.Parameters.Select(x => x.ParameterType));
if (maybeDuplicate != null)
{
Log_duplicate_member("property", yourProperty, maybeDuplicate);
if ((DebugOptions & DebugFlags.CreationOverwrites) != 0)
{
Log_overwriting();
return(NewMemberStatus.Continue);
}
if (newPropAttr.IsImplicit)
{
return(NewMemberStatus.InvalidItem);
}
throw Errors.Duplicate_member("property", yourProperty.FullName, maybeDuplicate.FullName);
}
var targetPropertyType = FixTypeReference(yourProperty.PropertyType);
var targetProperty = new PropertyDefinition(yourProperty.Name,
yourProperty.Attributes,
targetPropertyType)
{
HasThis = yourProperty.HasThis,
Constant = yourProperty.Constant,
HasDefault = yourProperty.HasDefault
};
targetType.Properties.Add(targetProperty);
foreach (var param in yourProperty.Parameters)
{
targetProperty.Parameters.Add(new ParameterDefinition(param.Name, param.Attributes,
FixTypeReference(param.ParameterType)));
}
return(NewMemberStatus.Continue);
}
/// <summary>
/// Creates a new field in the target assembly, for the specified type.
/// </summary>
/// <param name="targetDeclaringType">The target declaring type.</param>
/// <param name="yourField">Your field.</param>
/// <param name="attr">The action attribute.</param>
/// <exception cref="PatchDeclerationException">Thrown if this member collides with another member, and the error cannot be resolved.</exception>
/// <returns></returns>
private NewMemberStatus CreateNewField(TypeDefinition targetDeclaringType, FieldDefinition yourField,
NewMemberAttribute attr)
{
if (attr.IsImplicit)
{
Log_implicitly_creating_member("field", yourField);
}
else
{
Log_creating_member("field", yourField);
}
var maybeDuplicate = targetDeclaringType.GetField(yourField.Name);
if (maybeDuplicate != null)
{
Log_duplicate_member("field", yourField, maybeDuplicate);
if ((DebugOptions & DebugFlags.CreationOverwrites) != 0)
{
Log_overwriting();
return(NewMemberStatus.Continue);
}
if (attr.IsImplicit)
{
return(NewMemberStatus.InvalidItem);
}
throw Errors.Duplicate_member("type", yourField.FullName, maybeDuplicate.FullName);
}
var targetField =
new FieldDefinition(yourField.Name, yourField.Resolve().Attributes, FixTypeReference(yourField.FieldType))
{
InitialValue = yourField.InitialValue, //probably for string consts
Constant = yourField.Constant
};
targetDeclaringType.Fields.Add(targetField);
return(NewMemberStatus.Continue);
}
/// <summary>
/// Creates a new method in the target assembly, for the specified type.
/// </summary>
/// <param name="targetDeclaringType">The type declaring the method in the target assembly.</param>
/// <param name="yourMethod">Your method, which describes the method to create..</param>
/// <param name="actionAttribute">The action attribute ordering creation.</param>
/// <returns></returns>
/// <exception cref="PatchDeclerationException">Thrown if this member collides with another member, and the error cannot be resolved.</exception>
private NewMemberStatus CreateNewMethod(TypeDefinition targetDeclaringType, MethodDefinition yourMethod,
NewMemberAttribute actionAttribute)
{
if (actionAttribute.IsImplicit)
{
Log_implicitly_creating_member("method", yourMethod);
}
else
{
Log_creating_member("method", yourMethod);
}
var maybeDuplicate = targetDeclaringType.GetMethodsLike(yourMethod).FirstOrDefault();
if (maybeDuplicate != null)
{
Log_duplicate_member("method", yourMethod, maybeDuplicate);
if ((DebugOptions & DebugFlags.CreationOverwrites) != 0)
{
Log_overwriting();
//this only okay for controlled testing code.
return(NewMemberStatus.Continue);
}
if (actionAttribute.IsImplicit)
{
return(NewMemberStatus.InvalidItem);
}
throw Errors.Duplicate_member("type", yourMethod.FullName, maybeDuplicate.FullName);
}
var targetMethod = new MethodDefinition(yourMethod.Name, yourMethod.Attributes,
yourMethod.ReturnType)
{
ImplAttributes = yourMethod.ImplAttributes,
SemanticsAttributes = yourMethod.SemanticsAttributes,
CallingConvention = yourMethod.CallingConvention,
//all the Attributes and Conventions take care of most of the IsX/HasY properties, except for a few.
//this can be seen by looking at the Cecil code, where you can see which fields MethodDefinition has.
HasThis = yourMethod.HasThis,
ExplicitThis = yourMethod.ExplicitThis,
NoInlining = yourMethod.NoInlining,
NoOptimization = yourMethod.NoOptimization,
ReturnType = yourMethod.ReturnType //<---- this is temporary (setting it again to emphasize)
};
targetMethod.SecurityDeclarations.AddRange(yourMethod.SecurityDeclarations.Select(x => new SecurityDeclaration(x.Action, x.GetBlob())));
targetDeclaringType.Methods.Add(targetMethod);
//First we add the parameters to the method so its signature is correct.
//Note that we do not fix the types at this stage.
//This is because FixType calls can end up looking for the method we're adding right now
//if any of the parameter types are MVars. The signature has to be similar to yourMethod's signature
//if FixType is to find this definition.
//this may seem needlessly complicated and rather risky, and I thought so too, but there really isn't any way around it
//or at least, I'm not clever enough to come up with one that doesn't introduce more problems
//(believe me, I've tried all sorts of things)
foreach (var yourParam in yourMethod.Parameters)
{
targetMethod.Parameters.Add(new ParameterDefinition(yourParam.ParameterType));
}
//Note we're not adding any constraints yet because doing that involves FixType calls
//also, the T : S constraint involves 2 MVars, so unless we add all the MVars first, FixType calls could never be resolved.
var genList = new List <GenericParameter>();
foreach (var yourTypeParam in yourMethod.GenericParameters)
{
var targetTypeParam = new GenericParameter(yourTypeParam.Name, targetMethod)
{
Attributes = yourTypeParam.Attributes //includes non-type constraints
};
genList.Add(targetTypeParam);
}
targetMethod.GenericParameters.AddRange(genList);
//NOW we're adding constraints, when the signature is stable and when all MVars have been declared.
for (int i = 0; i < targetMethod.GenericParameters.Count; i++)
{
foreach (var constraint in yourMethod.GenericParameters[i].Constraints)
{
targetMethod.GenericParameters[i].Constraints.Add(FixTypeReference(constraint));
}
}
// note that we don't add the parameters to the method directly, at least not at first.
//this is because we're making FixType calls, and again, they can end up looking up targetMethod
//changing the signature will just end up with FixType not finding it.
var parList = new List <ParameterDefinition>();
foreach (var yourParam in yourMethod.Parameters)
{
var targetParamType = FixTypeReference(yourParam.ParameterType);
var targetParam = new ParameterDefinition(yourParam.Name, yourParam.Attributes, targetParamType)
{
Constant = yourParam.Constant,
};
parList.Add(targetParam);
}
//we reset the parameters after we're done with that in as near an atomic operation as possible, and without any FixType calls.
targetMethod.Parameters.Clear();
targetMethod.Parameters.AddRange(parList);
//we also fix this guy:
targetMethod.ReturnType = FixTypeReference(yourMethod.ReturnType);
//note that YOU DO NOT do targetMethod.Parameters.AddRangE(yourMethod.Parameters)
//ParameterDefinitions are mutable! and doing this can mutate them...
return(NewMemberStatus.Continue);
}
