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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /compiler/rustc_error_codes/src/error_codes/E0741.md | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_error_codes/src/error_codes/E0741.md')
-rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0741.md | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0741.md b/compiler/rustc_error_codes/src/error_codes/E0741.md new file mode 100644 index 000000000..70d963cd4 --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0741.md @@ -0,0 +1,25 @@ +A non-structural-match type was used as the type of a const generic parameter. + +Erroneous code example: + +```compile_fail,E0741 +#![feature(adt_const_params)] + +struct A; + +struct B<const X: A>; // error! +``` + +Only structural-match types (that is, types that derive `PartialEq` and `Eq`) +may be used as the types of const generic parameters. + +To fix the previous code example, we derive `PartialEq` and `Eq`: + +``` +#![feature(adt_const_params)] + +#[derive(PartialEq, Eq)] // We derive both traits here. +struct A; + +struct B<const X: A>; // ok! +``` |