document #![feature(const_generics_defaults)]
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ehuss
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Thanks for the PR! There seems to be some information missing, and I was wondering if you could incorporate some more? For example, some of the following are things that I've noticed:
- What are the restrictions for the expression in the default?
- Restrictions on the type of the default expression. I believe it must be the same type as the declaration, but can there be any coercion? Is it essentially a constant expression?
And anything else you can think of?
I understand that default generic parameters are not documented at all (#24). Although it would be great to have that, I think it's fine to not include it now.
Also, it can usually be helpful to provide some links to more information in the PR. I found the stabilization report which is very useful.
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matthiaskrgr
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Feb 16, 2022
Update books ## nomicon 3 commits in 9493715a6280a1f74be759c7e1ef9999b5d13e6f..90993eeac93dbf9388992de92965f99cf6f29a03 2022-01-27 19:00:32 -0800 to 2022-02-13 12:44:12 +0900 - Fix a small typo in exception-safety.md (rust-lang/nomicon#341) - Make `Vec::new` public in vec-alloc.md (rust-lang/nomicon#336) - Fix a syntax error in leaking.md (rust-lang/nomicon#335) ## reference 6 commits in 411c2f0d5cebf48453ae2d136ad0c5e611d39aec..70fc73a6b908e08e66aa0306856c5211312f6c05 2022-01-30 12:46:37 -0800 to 2022-02-14 19:33:01 -0800 - Document pre-Rust-2021 special case for IntoIterator method lookup (rust-lang/reference#1154) - Mention std::is_aarch64_feature_detected (rust-lang/reference#1061) - Fix link to the Bastion of the Turbofish (rust-lang/reference#1161) - Improve associated constant item CTFE timing section (rust-lang/reference#1147) - document `#![feature(const_generics_defaults)]` (rust-lang/reference#1098) - Update patterns allowed in @ patterns (rust-lang/reference#1158) ## book 6 commits in 98904efaa4fc968db8ff59cf2744d9f7ed158166..67b768c0b660a069a45f0e5d8ae2f679df1022ab 2022-01-29 21:22:31 -0500 to 2022-02-09 21:52:41 -0500 - Snapshot of ch18 for nostarch - Remove mention of destructuring references as that's not covered currently - Add note that exhaustiveness checking doesn't extend to match guards - Change match guard example to actually be unexpressable with patterns alone - Corrected listing number from 9-10 to 9-13 - Remove duplicate paragraph after No Starch related changes ## rustc-dev-guide 3 commits in 8763adb62c712df69b1d39ea3e692b6d696cc4d9..62f58394ba7b203f55ac35ddcc4c0b79578f5706 2022-01-26 14:01:40 -0800 to 2022-02-11 08:42:50 -0500 - Correction, building stage3 compiler (rust-lang/rustc-dev-guide#1298) - Triage some date references (rust-lang/rustc-dev-guide#1293) - mention test folders for cfg(bootstrap) (rust-lang/rustc-dev-guide#1294)
matthiaskrgr
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Feb 16, 2022
Update books ## nomicon 3 commits in 9493715a6280a1f74be759c7e1ef9999b5d13e6f..90993eeac93dbf9388992de92965f99cf6f29a03 2022-01-27 19:00:32 -0800 to 2022-02-13 12:44:12 +0900 - Fix a small typo in exception-safety.md (rust-lang/nomicon#341) - Make `Vec::new` public in vec-alloc.md (rust-lang/nomicon#336) - Fix a syntax error in leaking.md (rust-lang/nomicon#335) ## reference 6 commits in 411c2f0d5cebf48453ae2d136ad0c5e611d39aec..70fc73a6b908e08e66aa0306856c5211312f6c05 2022-01-30 12:46:37 -0800 to 2022-02-14 19:33:01 -0800 - Document pre-Rust-2021 special case for IntoIterator method lookup (rust-lang/reference#1154) - Mention std::is_aarch64_feature_detected (rust-lang/reference#1061) - Fix link to the Bastion of the Turbofish (rust-lang/reference#1161) - Improve associated constant item CTFE timing section (rust-lang/reference#1147) - document `#![feature(const_generics_defaults)]` (rust-lang/reference#1098) - Update patterns allowed in @ patterns (rust-lang/reference#1158) ## book 6 commits in 98904efaa4fc968db8ff59cf2744d9f7ed158166..67b768c0b660a069a45f0e5d8ae2f679df1022ab 2022-01-29 21:22:31 -0500 to 2022-02-09 21:52:41 -0500 - Snapshot of ch18 for nostarch - Remove mention of destructuring references as that's not covered currently - Add note that exhaustiveness checking doesn't extend to match guards - Change match guard example to actually be unexpressable with patterns alone - Corrected listing number from 9-10 to 9-13 - Remove duplicate paragraph after No Starch related changes ## rustc-dev-guide 3 commits in 8763adb62c712df69b1d39ea3e692b6d696cc4d9..62f58394ba7b203f55ac35ddcc4c0b79578f5706 2022-01-26 14:01:40 -0800 to 2022-02-11 08:42:50 -0500 - Correction, building stage3 compiler (rust-lang/rustc-dev-guide#1298) - Triage some date references (rust-lang/rustc-dev-guide#1293) - mention test folders for cfg(bootstrap) (rust-lang/rustc-dev-guide#1294)
matthiaskrgr
added a commit
to matthiaskrgr/rust
that referenced
this pull request
Feb 16, 2022
Update books ## nomicon 3 commits in 9493715a6280a1f74be759c7e1ef9999b5d13e6f..90993eeac93dbf9388992de92965f99cf6f29a03 2022-01-27 19:00:32 -0800 to 2022-02-13 12:44:12 +0900 - Fix a small typo in exception-safety.md (rust-lang/nomicon#341) - Make `Vec::new` public in vec-alloc.md (rust-lang/nomicon#336) - Fix a syntax error in leaking.md (rust-lang/nomicon#335) ## reference 6 commits in 411c2f0d5cebf48453ae2d136ad0c5e611d39aec..70fc73a6b908e08e66aa0306856c5211312f6c05 2022-01-30 12:46:37 -0800 to 2022-02-14 19:33:01 -0800 - Document pre-Rust-2021 special case for IntoIterator method lookup (rust-lang/reference#1154) - Mention std::is_aarch64_feature_detected (rust-lang/reference#1061) - Fix link to the Bastion of the Turbofish (rust-lang/reference#1161) - Improve associated constant item CTFE timing section (rust-lang/reference#1147) - document `#![feature(const_generics_defaults)]` (rust-lang/reference#1098) - Update patterns allowed in @ patterns (rust-lang/reference#1158) ## book 6 commits in 98904efaa4fc968db8ff59cf2744d9f7ed158166..67b768c0b660a069a45f0e5d8ae2f679df1022ab 2022-01-29 21:22:31 -0500 to 2022-02-09 21:52:41 -0500 - Snapshot of ch18 for nostarch - Remove mention of destructuring references as that's not covered currently - Add note that exhaustiveness checking doesn't extend to match guards - Change match guard example to actually be unexpressable with patterns alone - Corrected listing number from 9-10 to 9-13 - Remove duplicate paragraph after No Starch related changes ## rustc-dev-guide 3 commits in 8763adb62c712df69b1d39ea3e692b6d696cc4d9..62f58394ba7b203f55ac35ddcc4c0b79578f5706 2022-01-26 14:01:40 -0800 to 2022-02-11 08:42:50 -0500 - Correction, building stage3 compiler (rust-lang/rustc-dev-guide#1298) - Triage some date references (rust-lang/rustc-dev-guide#1293) - mention test folders for cfg(bootstrap) (rust-lang/rustc-dev-guide#1294)
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stabilisation report for this feautre
cc @rust-lang/project-const-generics