Error code E0014
Note: this error code is no longer emitted by the compiler.
Constants can only be initialized by a constant value or, in a future version of Rust, a call to a const function. This error indicates the use of a path (like a::b, or x) denoting something other than one of these allowed items.
Erroneous code example:
#![allow(unused)] fn main() { const FOO: i32 = { let x = 0; x }; // 'x' isn't a constant nor a function! }
To avoid it, you have to replace the non-constant value:
#![allow(unused)] fn main() { const FOO: i32 = { const X : i32 = 0; X }; // or even: const FOO2: i32 = { 0 }; // but brackets are useless here }