Struct CompileTimeGuaranteedError 

pub struct CompileTimeGuaranteedError {
    pub token_name: &'static str,
    pub target_features: &'static str,
    pub disable_flags: &'static str,
}

Error returned when attempting to disable a token whose features are compile-time enabled.

When all required features are enabled via -Ctarget-cpu or -Ctarget-feature, the compiler has already elided the runtime detection — summon() unconditionally returns Some. Disabling the token would have no effect and silently produce incorrect behavior.

Resolution

To use dangerously_disable_token_process_wide, compile without the target features enabled. For example:

• Remove -Ctarget-cpu=native from RUSTFLAGS
• Use the disable_flags string to disable specific features

Fields

token_name: &'static str

The token type that cannot be disabled.

target_features: &'static str

Comma-delimited target features (e.g., "avx2,fma,bmi1,bmi2,f16c,lzcnt"). Empty for ScalarToken.

disable_flags: &'static str

RUSTFLAGS to disable these features (e.g., "-Ctarget-feature=-avx2,-fma,..."). Empty for ScalarToken.

Trait Implementations

impl Clone for CompileTimeGuaranteedError

fn clone(&self) -> CompileTimeGuaranteedError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CompileTimeGuaranteedError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for CompileTimeGuaranteedError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for CompileTimeGuaranteedError

Available on crate feature std only.

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.