Tracking issue for FromStr trait usage in const fn
#59133
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A-const-fn
Area: const fn foo(..) {..}. Pure functions which can be applied at compile time.
C-tracking-issue
Category: A tracking issue for an RFC or an unstable feature.
T-libs-api
Relevant to the library API team, which will review and decide on the PR/issue.
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jonas-schievink
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Isn't this just #67792 / rust-lang/rfcs#2632? |
This was referenced Jul 16, 2022
Dylan-DPC
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Mar 30, 2024
Make {integer}::from_str_radix constant
This commit makes FromStr on integers constant so that `const x: u32 = "23".parse();` works. More practical use-case is with environment variables at build time as discussed in rust-lang/rfcs#1907.
Tracking issue rust-lang#59133.
ACP: rust-lang/libs-team#74
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Because Rust already have macros that evaluate on compile time to strings I think converting them to ints in a
const fnis a very nice feature.e.g.
env!("SOMETHING").parse::<usize>().unwrap()I opened this Issue as part of: #57563
Interested to hear if other people want this and if it's already exists as part of a different issue/RFC
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