issues-280 Rewrite drivers using proc-macro

[ikrivosheev]

PR Info

• Closes The trait is not implemented for #280

Fixes

Rewrite drivers for: rusqlite, sqlx_* from macro_rules to proc-macro. In proc-macro we can use cfg instead of blank method for types, which enable by crate features and fix: #280

I add cfg for implementation methods which enable by feature like: with-*.

Breaking Changes

1. Remove methods Value::is_json and Value::as_ref_json when feature: with-json is disabled
2. Remove methods Value::is_time_* and Value::as_ref_time_* when feature: with-time is disabled
3. Remove methods Value::is_chrono_* and Value::as_ref_chrono* when feature: with-chrono is disabled
4. Remove methods Value::is_decimal, Value::as_ref_decimal and Value::decimal_to_f64 when feature: with-rust_decimal is disabled
5. Remove methods Value::is_big_decimal, Value::as_ref_big_decimal and Value::big_decimal_to_f64 when feature: with-bigdecimal is disabled
6. Remove methods Value::is_uuid and Value::as_ref_uuid when feature: with-uuid is disabled
7. Remove methods Value::is_array and Value::as_ref_array when feature: postgres-array is disabled

[tyt2y3]

Thank you. This looked extremely brilliant!
Does that mean the examples stay the same with no change?
Btw we might want to add it to the workspace? https://github.com/SeaQL/sea-query/blob/master/Cargo.toml#L2
The only nitpick might be.. can we name the crate sea-query-drivers ?

[ikrivosheev]

@tyt2y3 thank you for review. Done, renamed!

Yes, all examples work as before. But, for example, if feature: with-json does not enable, Value does not have methods: is_json, as_json_ref.

[ikrivosheev]

@tyt2y3 i rebase branch with master.

[tyt2y3]

Thank you for the explanation. I think it also obeys the rule of "feature addition"

[ikrivosheev]

@tyt2y3 what should i do?

[tyt2y3]

Oh, nothing more has to be done. Great work indeed. I was thinking the scenario where two downstream creates each with a different feature set in their dependencies. And that would work in theory

[ikrivosheev]

@tyt2y3 I have seen similar approach in other libraries (for example syn, when features add new functions and methods into crate and types. It is very comfortable and works well in rust.

[ikrivosheev]

@billy1624 @tyt2y3 I have corrected the description