I have a simple function that generates code, for a generated function I want to make:

```
function issite_gen(operation, N)
ex = :($operation(arr[1]))
for i in 2:N
ex = :($ex | $operation(arr[$i]))
end
ex
end
```

It does things like this:

```
julia> issite_gen(:count_ones, 1)
:(count_ones(arr[1]))
julia> issite_gen(:count_ones, 2)
:(count_ones(arr[1]) | count_ones(arr[2]))
julia> issite_gen(:count_ones, 3)
:((count_ones(arr[1]) | count_ones(arr[2])) | count_ones(arr[3]))
```

I wanted to see if I could change the `|`

operator using a parameter e.g, make it a + insteadof |, but it messes up the expression generated:

```
function issite_gen(operation, N, op)
ex = :($operation(arr[1]))
for i in 2:N
ex = :($ex $op $operation(arr[$i]))
end
ex
end
julia> issite_gen(:count_ones, 1, :+)
:(count_ones(arr[1]))
julia> issite_gen(:count_ones, 2, :+)
:((count_ones(arr[1]) $ op) $ operation(arr[2]))
julia> issite_gen(:count_ones, 3, :+)
:((((count_ones(arr[1]) $ op) $ operation(arr[2])) $ op) $ operation(arr[3]))
```

Does anybody know what the issue is I’m missing?