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 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(),
});
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;
}