rust-lang / rust-lang/rfcs

Proposal: Allow optional `type` keyword in generic

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Description

We have 3 kinds of generic parameters at present : type, lifetime and const value.

struct GenericType<T, 'a, const U> {}

Lifetime and const value starts with significant obvious punctuation and keyword, but normal type does not.

I'm proposing to allow type keyword in this situation.

// Multiply kinds of generic parameters involved
struct GenericType<type T, 'a, const U> {}

// only type parameter involved
struct GenericType<T1, T2> {}

Is there anybody agree with me that this may be clearer?

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Research direction

Start with the proposed generic-parameter syntax in this issue and review the repository's RFC process; no implementation files or tests are named. Done would require a resolved proposal and accepted RFC direction for allowing an optional type keyword, rather than a localized code change.

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Assessment

Tech stack
rust
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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