private Expression WithEventCheck(GetMemberDynamicCSharpExpression member, string accessor)
{
var obj = member.Object;
var name = member.Name;
var args = member.Arguments;
Debug.Assert(args.Count == 0);
var lhs = Expression.Parameter(obj.Type, "__objTemp");
var left = Left.Update(member.Update(lhs, args));
var isEventBinder = Binder.IsEvent(CSharpBinderFlags.None, name, Context);
var isEventCheck = DynamicHelpers.MakeDynamic(typeof(bool), isEventBinder, new[] { lhs }, null);
var accessorName = accessor + name;
var accessorArgs = new[]
{
CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null),
CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null),
};
var invokeAccessorBinder = Binder.InvokeMember(CSharpBinderFlags.InvokeSpecialName | CSharpBinderFlags.ResultDiscarded, accessorName, null, Context, accessorArgs);
var invokeAccessor = DynamicHelpers.MakeDynamic(typeof(object), invokeAccessorBinder, new[] { lhs, Right.Expression }, null);
var ifNotEvent = ReduceCore(left);
var res =
Expression.Block(
new[] { lhs },
Expression.Assign(lhs, obj),
Expression.Condition(isEventCheck, invokeAccessor, ifNotEvent)
);
return(res);
}
private static Expression ReduceDynamicMember(GetMemberDynamicCSharpExpression member, Func <Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix)
{
var args = default(DynamicCSharpArgument[]);
var block = default(Expression[]);
var temps = default(ParameterExpression[]);
var i = CopyArguments(member.Object, member.Arguments, prefix, out args, out block, out temps);
member = member.Update(temps[0], new TrueReadOnlyCollection <DynamicCSharpArgument>(args));
if (prefix)
{
block[i++] = member.ReduceAssignment(functionalOp(member), flags);
}
else
{
var lastTemp = temps[i] = Expression.Parameter(member.Type, "__temp");
block[i] = Expression.Assign(temps[i], member);
i++;
block[i++] = member.ReduceAssignment(functionalOp(lastTemp), flags);
block[i++] = lastTemp;
}
var res = Expression.Block(temps, block);
return(res);
}
private static Expression ReduceDynamicMember(GetMemberDynamicCSharpExpression member, Func<Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix)
{
var args = default(DynamicCSharpArgument[]);
var block = default(Expression[]);
var temps = default(ParameterExpression[]);
var i = CopyArguments(member.Object, member.Arguments, prefix, out args, out block, out temps);
member = member.Update(temps[0], new TrueReadOnlyCollection<DynamicCSharpArgument>(args));
if (prefix)
{
block[i++] = member.ReduceAssignment(functionalOp(member), flags);
}
else
{
var lastTemp = temps[i] = Expression.Parameter(member.Type, "__temp");
block[i] = Expression.Assign(temps[i], member);
i++;
block[i++] = member.ReduceAssignment(functionalOp(lastTemp), flags);
block[i++] = lastTemp;
}
var res = Expression.Block(temps, block);
return res;
}
private Expression ReduceAssign()
{
var lhs = Left.Expression;
return(lhs switch
{
GetMemberDynamicCSharpExpression getMember => getMember.ReduceAssignment(Right.Expression, Flags, Left.Flags, Right.Flags),
GetIndexDynamicCSharpExpression getIndex => getIndex.ReduceAssignment(Right.Expression, Flags, Left.Flags, Right.Flags),
_ => ReduceStaticAssign(),
});
public static Expression ReduceDynamicAssignment(DynamicCSharpArgument left, Func <Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix = true)
{
var lhs = MakeWriteable(left.Expression);
return(lhs switch
{
GetMemberDynamicCSharpExpression dynamicMember => ReduceDynamicMember(dynamicMember, functionalOp, flags, prefix),
GetIndexDynamicCSharpExpression dynamicIndex => ReduceDynamicIndex(dynamicIndex, functionalOp, flags, prefix),
_ => Helpers.ReduceAssignment(lhs, functionalOp, prefix),
});
protected internal override Expression VisitDynamicGetMember(GetMemberDynamicCSharpExpression node)
{
var args = new List <object>();
args.Add(new XAttribute(nameof(node.Name), node.Name));
VisitDynamicCSharpExpression(node, args);
args.Add(new XElement(nameof(node.Object), Visit(node.Object)));
return(Push(node, args));
}
private static Expression ReduceDynamicMember(GetMemberDynamicCSharpExpression member, Func <Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix)
{
var i = CopyArguments(member.Object, member.Arguments, prefix, out DynamicCSharpArgument[] args, out Expression[] block, out ParameterExpression[] temps);
public GetMemberDynamicCSharpExpressionProxy(GetMemberDynamicCSharpExpression node)
{
_node = node;
}
private Expression WithEventCheck(GetMemberDynamicCSharpExpression member, string accessor)
{
var obj = member.Object;
var name = member.Name;
var args = member.Arguments;
Debug.Assert(args.Count == 0);
var lhs = Expression.Parameter(obj.Type, "__objTemp");
var left = Left.Update(member.Update(lhs, args));
var isEventBinder = Binder.IsEvent(CSharpBinderFlags.None, name, Context);
var isEventCheck = DynamicHelpers.MakeDynamic(typeof(bool), isEventBinder, new[] { lhs }, null);
var accessorName = accessor + name;
var accessorArgs = new[]
{
CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null),
CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null),
};
var invokeAccessorBinder = Binder.InvokeMember(CSharpBinderFlags.InvokeSpecialName | CSharpBinderFlags.ResultDiscarded, accessorName, null, Context, accessorArgs);
var invokeAccessor = DynamicHelpers.MakeDynamic(typeof(object), invokeAccessorBinder, new[] { lhs, Right.Expression }, null);
var ifNotEvent = ReduceCore(left);
var res =
Expression.Block(
new[] { lhs },
Expression.Assign(lhs, obj),
Expression.Condition(isEventCheck, invokeAccessor, ifNotEvent)
);
return res;
}
protected internal virtual Expression VisitDynamicGetMember(GetMemberDynamicCSharpExpression node)
{
return(node.Update(Visit(node.Object), Visit(node.Arguments, VisitDynamicArgument)));
}
public GetMemberDynamicCSharpExpressionProxy(GetMemberDynamicCSharpExpression node)
{
_node = node;
}
protected internal virtual Expression VisitDynamicGetMember(GetMemberDynamicCSharpExpression node)
{
return node.Update(Visit(node.Object), Visit(node.Arguments, VisitDynamicArgument));
}