You are calling a function in a const or static context that is not marked as const fn. Only const fn functions can be evaluated at compile time.

Mark the function as const fn if possible. Move the computation to runtime (use lazy_static! or once_cell). Use a literal value instead of a function call in const contexts.

E0015 — E0015 — Calls in Constants Are Limited | Error Code Encyclopedia | akousa.net

Rust-Compiler-FehlerFehler

E0716

E0716 — Temporary Value Dropped While Borrowed

A reference is held to a temporary value that is immediately dropped.

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Rust-Compiler-FehlerFehler

E0308

E0308 — Result Type Mismatch

The function returns a Result with the wrong Ok or Err type.

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Rust-Compiler-FehlerWarnung

clippy::needless_return

Clippy — Needless Return

A return keyword is used unnecessarily at the end of a function.

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Rust-Compiler-FehlerFehler

E0405

E0405 — Cannot Find Trait in This Scope

A trait name is used but not defined or imported in the current scope.

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Rust-Compiler-FehlerFatal

panic-slice-index-out-of-range

Panic — Slice Index Out of Range

The program panicked because a slice range is out of bounds.

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Rust-Compiler-FehlerFehler

E0308

E0308 — Closure Return Type Mismatch

The closure returns a different type than expected by the context.

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E0015 — Calls in Constants Are Limited

Was verursacht diesen Fehler

So beheben Sie ihn

Verwandte Fehlercodes

E0716 — Temporary Value Dropped While Borrowed

E0308 — Result Type Mismatch

Clippy — Needless Return

E0405 — Cannot Find Trait in This Scope

Panic — Slice Index Out of Range

E0308 — Closure Return Type Mismatch

E0015 — Calls in Constants Are Limited

Was verursacht diesen Fehler

So beheben Sie ihn

Verwandte Fehlercodes

E0716 — Temporary Value Dropped While Borrowed

E0308 — Result Type Mismatch

Clippy — Needless Return

E0405 — Cannot Find Trait in This Scope

Panic — Slice Index Out of Range

E0308 — Closure Return Type Mismatch