private static Expression ReduceDynamicIndex(GetIndexDynamicCSharpExpression index, Func <Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix)
{
var args = default(DynamicCSharpArgument[]);
var block = default(Expression[]);
var temps = default(ParameterExpression[]);
var i = CopyArguments(index.Object, index.Arguments, prefix, out args, out block, out temps);
index = index.Update(temps[0], new TrueReadOnlyCollection <DynamicCSharpArgument>(args));
if (prefix)
{
block[i++] = index.ReduceAssignment(functionalOp(index), flags);
}
else
{
var lastTemp = temps[i] = Expression.Parameter(index.Type, "__index");
block[i] = Expression.Assign(temps[i], index);
i++;
block[i++] = index.ReduceAssignment(functionalOp(lastTemp), flags);
block[i++] = lastTemp;
}
var res = Expression.Block(temps, block);
return(res);
}
private static Expression ReduceDynamicIndex(GetIndexDynamicCSharpExpression index, Func<Expression, Expression> functionalOp, CSharpBinderFlags flags, bool prefix)
{
var args = default(DynamicCSharpArgument[]);
var block = default(Expression[]);
var temps = default(ParameterExpression[]);
var i = CopyArguments(index.Object, index.Arguments, prefix, out args, out block, out temps);
index = index.Update(temps[0], new TrueReadOnlyCollection<DynamicCSharpArgument>(args));
if (prefix)
{
block[i++] = index.ReduceAssignment(functionalOp(index), flags);
}
else
{
var lastTemp = temps[i] = Expression.Parameter(index.Type, "__index");
block[i] = Expression.Assign(temps[i], index);
i++;
block[i++] = index.ReduceAssignment(functionalOp(lastTemp), flags);
block[i++] = lastTemp;
}
var res = Expression.Block(temps, block);
return res;
}
protected internal override Expression VisitDynamicGetIndex(GetIndexDynamicCSharpExpression node)
{
var args = VisitDynamicCSharpExpression(node);
args.Add(new XElement(nameof(node.Object), Visit(node.Object)));
args.Add(Visit(nameof(node.Arguments), node.Arguments, Visit));
return(Push(node, args));
}
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),
});
public GetIndexDynamicCSharpExpressionProxy(GetIndexDynamicCSharpExpression node)
{
_node = node;
}
protected internal virtual Expression VisitDynamicGetIndex(GetIndexDynamicCSharpExpression node)
{
return(node.Update(Visit(node.Object), Visit(node.Arguments, VisitDynamicArgument)));
}
public GetIndexDynamicCSharpExpressionProxy(GetIndexDynamicCSharpExpression node)
{
_node = node;
}
protected internal virtual Expression VisitDynamicGetIndex(GetIndexDynamicCSharpExpression node)
{
return node.Update(Visit(node.Object), Visit(node.Arguments, VisitDynamicArgument));
}