rust-lang / rust-lang/rfcs

type inference for consts/statics

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Description

We shouldn't require types for consts and statics unless necessary. const FOO = "foo"; or static bar = 42; should just work. I propose that we try to infer based only on the RHS, i.e., we do not look at uses of consts/statics. Type error if we can't infer based on that. Although this would break the rule that items must be fully annotated, it would make static/const more consistent with let.

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Research direction

No files, tests, or entry points are named. Read the 38-comment thread and the repository's RFC process first; a completed proposal would resolve whether consts and statics may infer types from their RHS and define the behavior when inference fails.

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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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