OpenMP Constructs
* `parallel`
* `for`
* `sections`
* `threadprivate`
* `single`
* `master`
* `critical`
* `atomic`
* `ordered`

Clauses
* `private(`list`)`
* `shared(`list`)`
* `default(none`|`shared)`
* `num_threads(`n`)`
* `schedule(static, n)`
* `schedule(dynamic, n)`
* ...