Derives

[TonalidadeHidrica]

What macros do we have to derive for structs?

[qryxip]

• Clone, Debug We should implement Clone and Debug for all of the types.
• Copy If a type can implement Copy and is small enough, we should implement Copy for it.
  • clippy::trivially_copy_pass_by_ref
• Default
  • clippy::new_without_default
• Hash We cannot insert into Hash{Set, Map} without Hash implementation.
• (Partial)Eq Required for ==, != operators.
• (Partial)Ord Required for comperation operators such as <, <=. Also types without Ord implementation cannot be store in BTree{Set, Map} or BinaryHeap.
• From, Into, TryFrom, TryInto (No derive macro in std) With these implementations, we can easiliy convert types with .into().
• FromStr (No derive macro in std) We can get values from stdin directly.
• Display (No derive macro in std) We can println! the values directly.
• FromIterator (No derive macro in std) Collection-like types should be implement this, as we can construct them with elements.collect::<Foo>().
• IntoIterator (No derive macro in std) Collection-like types should be implement this, as we can iterate elements with for elem in &foo { .. } or for elem in foo { .. }.
• As{Ref, Mut}, Index{Mut}, binary operators, ... (No derive macro in std)

[TonalidadeHidrica]

Thanks a lot. I'll consider implementing those traits. Should I close it now?

[qryxip]

Yes. We may discuss such a general topic in rust-jp.slack.com.

[qryxip]

We should discuss in each PR.