Implement replace regex using boost

[JordanHendersonMusic]

Purpose and Motivation

https://scsynth.org/t/testing-a-draft-of-replaceregexp

Types of changes

• Documentation
• New feature

To-do list

• Code is tested
• All tests are passing
• Updated documentation
• This PR is ready for review

[JordanHendersonMusic]

Does anyone know if the object previously at the return slot needs to be free'd manually gc?

Edit: no it doesn't

[smoge]

I would guess not because of GC. But I have a question. When the code runs into a problem, like receiving the wrong type of data or encountering an issue while processing a regular expression, is SetNil(slot_this) enough? if some data to return but then hits a snag, does the cleanup system still works without manually deallocating output_string? In other words, was it assigned to a slot for GC to manage?

(This is not a review, but just a question)

[JordanHendersonMusic]

I would guess not because of GC. But I have a question. When the code runs into a problem, like receiving the wrong type of data or encountering an issue while processing a regular expression, is SetNil(slot_this) enough? if some data to return but then hits a snag, does the cleanup system still works without manually deallocating output_string? In other words, was it assigned to a slot for GC to manage?

(This is not a review, but just a question)

I have no idea... just copied to conventions in the other primitives 🙂

[JordanHendersonMusic]

Coming back to this after learning more... in his case no it doesn't because there isn't any point of failure between creating the string and assigning it to a slot, but in general yes. It is quite common to push any temporary variables onto the end of the stack for this reason.

[JordanHendersonMusic]

I've updated this now with tests and documentation.