https://errorvault.dev/tags/e0207/ Recent content in E0207 on ErrorVault — Developer Error Code Dictionary Hugo en-us Fri, 17 Jul 2026 07:56:04 +0800 https://errorvault.dev/rust/rust-e0207-const-parameter-copy-type/ Fri, 17 Jul 2026 07:56:04 +0800 https://errorvault.dev/rust/rust-e0207-const-parameter-copy-type/ <h1 id="fix-e0207-const-parameter-type-must-be-copy-in-rust">Fix E0207: Const Parameter Type Must Be Copy in Rust</h1> <p>Rust&rsquo;s const generics provide powerful compile-time computation capabilities, but they come with strict requirements on what types can be used as const parameters. Error code E0207 specifically indicates that a const generic parameter has been declared with a type that does not implement the <code>Copy</code> trait. This limitation exists because const parameters must be evaluable at compile time, and only <code>Copy</code> types guarantee deterministic, repeatable evaluation without side effects.</p>