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Diffstat (limited to 'compiler/rustc_error_codes/src/error_codes/E0625.md')
-rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0625.md | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0625.md b/compiler/rustc_error_codes/src/error_codes/E0625.md new file mode 100644 index 000000000..7db857723 --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0625.md @@ -0,0 +1,28 @@ +A compile-time const variable is referring to a thread-local static variable. + +Erroneous code example: + +```compile_fail,E0625 +#![feature(thread_local)] + +#[thread_local] +static X: usize = 12; + +const Y: usize = 2 * X; +``` + +Static and const variables can refer to other const variables but a const +variable cannot refer to a thread-local static variable. In this example, +`Y` cannot refer to `X`. To fix this, the value can be extracted as a const +and then used: + +``` +#![feature(thread_local)] + +const C: usize = 12; + +#[thread_local] +static X: usize = C; + +const Y: usize = 2 * C; +``` |