Move crsql_createCrr to Rust

[Azarattum]

Closes https://github.com/vlcn-io/cr-sqlite/issues/325.

Functions moved to rust:

• getTableInfo -> pull_table_info (found a todo comment to rename this one)
• freeTableInfo -> free_table_info
• isTableCompatible -> is_table_compatible
• createCrr -> create_crr

Table info is implemented with raw pointers to ensure compatibility with C counterparts. Therefore all the C tests verify the new Rust implementations.

Also we can convert the entire tableinfo.c as long as we convert get-table.c (as it is its only dependency). I can continue doing that here or start a new issue/PR for that.

[tantaman]

also -- I'm assuming you can address the two issues and update the PR even though I approved the pull request?

That was a flow we often used at Facebook (approved with comments to be addressed) but idk if it works on GitHub.

[tantaman]

Also we can convert the entire tableinfo.c as long as we convert get-table.c (as it is its only dependency). I can continue doing that here or start a new issue/PR for that.

Lets do it in a new PR.

[Azarattum]

I love it and learned some idiomatic rust today.

This is curious... I expected to get some things wrong. The big reason why I took this PR is that I wanted to start learning Rust. Actually this is my first real code in Rust 😅

[tantaman]

This is curious...

haha, well I learned more ways to use generic traits and about map_err

[tantaman]

Actually this is my first real code in Rust

Could have fooled me but I took a second look over and found some things that should be addressed.

[Azarattum]

@tantaman what do you think? I've added a Countable util trait since that code repeated too often. is_table_compatible function is considerably simpler now.

[tantaman]

is_table_compatible function is considerably simpler now.

👍