cplusplus / cplusplus/draft

[tuple], [variant] Use pack indexing

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Description

https://eel.is/c++draft/tuple.cnstr and https://eel.is/c++draft/variant.ctor#1 provide an invented syntax $T_i$ to denote the $i^{th}$ type in a pack Types.

This invented syntax is completely unnecessary now that we have pack indexing; we could simply write Types...[i], and probably should do so.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the tuple constructors clause at https://eel.is/c++draft/tuple.cnstr and the variant constructor clause at https://eel.is/c++draft/variant.ctor#1. Check how each currently describes the invented $T_i$ syntax, then update both references to use pack indexing consistently; done means the two clauses no longer rely on that invented notation.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
documentation
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

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