Clarify that free constants are always evaluated at compile time #1328
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See rust-lang/rust#93838 It seems like everyone is onboard with blessing this behavior as stable.
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I don't think we want to do any special-casing based on the name (or lack thereof) of a constant. This rule applies to all non-associated constants and should be documented as such. |
Especially since it seems that there is no test in rust-lang/rust that covers the unamed constant case (even though the implementation covers it). rust-lang/rust#93838 (comment)
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scottmcm
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Mar 14, 2023
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Discussed in the @rust-lang/lang meeting and concluded that this represents existing consensus. Ship it! |
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Update books ## rust-lang/nomicon 1 commits in 1f3e4cd4fd88b5b5d45feb86a11b6d2f93e5a974..b5f7500fc40775096c2bbd204eae096612cf9047 2023-03-27 13:47:36 UTC to 2023-03-27 13:47:36 UTC - Fix typo in 3.8 Subtyping and Variance (rust-lang/nomicon#395) ## rust-lang/reference 4 commits in 24c87f6663aed55b05d2cc286878f28f21918825..3c47807a3131b3c7cacb508f52632078d253cd0a 2023-03-26 18:42:43 UTC to 2023-03-14 18:28:23 UTC - Relax ordering rules for `asm!` operands (rust-lang/reference#1323) - Improve labeled blocks documentation (rust-lang/reference#1342) - Inline assembly: Fix repeated and unordered items in guaranteed directives (rust-lang/reference#1341) - Clarify that free constants are always evaluated at compile time (rust-lang/reference#1328) ## rust-lang/rust-by-example 7 commits in af0998b7473839ca75563ba3d3e7fd0160bef235..cfbfd648ce33926c3490f24de9a5b56cce404b88 2023-03-21 12:05:17 UTC to 2023-03-21 11:58:20 UTC - Fix two typos in the asm chapter (rust-lang/rust-by-example#1692) - Change `runtime` error to `compile time` error (rust-lang/rust-by-example#1690) - Fix tests running on non-x86 platforms. (rust-lang/rust-by-example#1687) - Remove trailing semicolon from macro expression (rust-lang/rust-by-example#1683) - Explained why it should not work in Chapter 4.1 (rust-lang/rust-by-example#1682) - Fix comment to mention the correct type of error (rust-lang/rust-by-example#1680) - Improve the content for `read_lines` (rust-lang/rust-by-example#1679) ## rust-lang/rustc-dev-guide 9 commits in b1b6d69..d08baa1 2023-03-26 17:55:53 UTC to 2023-03-14 03:50:20 UTC - Add locale_resources (rust-lang/rustc-dev-guide#1651) - Don't require $GITHUB_TOKEN to build locally (rust-lang/rustc-dev-guide#1652) - bootsrapping stages overview list (rust-lang/rustc-dev-guide#1555) - Update labels overview (rust-lang/rustc-dev-guide#1639) - first mention of type, and add a link (rust-lang/rustc-dev-guide#1643) - Add SIP solution for macOS users (rust-lang/rustc-dev-guide#1636) - Add chapter on fuzzing (rust-lang/rustc-dev-guide#1646) - Fix "Crate disambiguator" in libs-and-metadata.md (rust-lang/rustc-dev-guide#1648) - Update rustdoc-internals.md (rust-lang/rustc-dev-guide#1644)
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See rust-lang/rust#93838
It seems like everyone is onboard with blessing this (useful) behavior as stable.