Rust errors / Types and traits
Rust compiler error · checked with rustc 1.99.0
Rust error E0094: intrinsic has wrong number of type parameters: found 2, expected 1
What it meansAn invalid number of generic parameters was passed to an intrinsic function.
What rustc prints
error[E0094]: intrinsic has wrong number of type parameters: found 2, expected 1
--> main.rs:5:11
|
5 | fn size_of<T, U>() -> usize; // error: intrinsic has wrong number
| ^^^^^^ expected 1 type parameterReal output of rustc 1.99.0 compiling the official example below (2021 edition). Your names and line numbers will differ; the first line is the part to match.
E0094Types and traits
Activein rustc 1.99.0
8related errors linked below
The compiler team's explanation
An invalid number of generic parameters was passed to an intrinsic function.
Erroneous code example:
#![feature(intrinsics)]
#![allow(internal_features)]
#[rustc_intrinsic]
fn size_of<T, U>() -> usize; // error: intrinsic has wrong number
// of type parametersPlease check that you provided the right number of type parameters and verify with the function declaration in the Rust source code. Example:
#![feature(intrinsics)]
#![allow(internal_features)]
#[rustc_intrinsic]
fn size_of<T>() -> usize; // ok!From rustc --explain E0094 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.
Related errors
- E0308mismatched types
- E0277the trait bound is not satisfied
- E0599no method named X found in the current scope
- E0433failed to resolve
- E0077SIMD vector element type should be a primitive scalar (integer/float/pointer) type
- E0091type parameter `T` is never used
- E0107missing generics for struct `Foo`
- E0109type arguments are not allowed on builtin type `u32`
Up next
Often hit nextE0308: mismatched typesA related error from the same family.Read it next →Did this answer your question?