Enum BddBuildError 

pub enum BddBuildError {
    TooLarge {
        budget: usize,
        during: &'static str,
    },
    CnfTooLarge {
        limit: usize,
        during: &'static str,
    },
    TooManyBits {
        bits: usize,
    },
    Ir(IrError),
    StateUnknown(StateId),
    UnboundState(StateId),
    UnboundVar(VarId),
    Unexpanded,
    VarWidthMismatch {
        var: VarId,
        declared: u32,
        used: u32,
    },
}

Why a constraint set could not be turned into a BDD.

Variants

TooLarge

A BDD operation would exceed the node budget; the engine falls back to SAT.

Fields

budget: usize

The budget that was exceeded.

during: &'static str

The IR operation being blasted when it was exceeded.

CnfTooLarge

The CNF the SAT fallback would build exceeds its clause limit.

Fields

limit: usize

The clause limit that was exceeded.

during: &'static str

The IR operation being blasted when it was exceeded.

TooManyBits

More random-variable bits than the BDD library has variables.

Fields

bits: usize

Total bits requested.

Ir(IrError)

The IR is ill-typed (a builder bug).

StateUnknown(StateId)

A state variable read has an X/Z bit (LRM 18.3, decision E9).

UnboundState(StateId)

The IR names a state variable the caller did not supply.

UnboundVar(VarId)

The IR names a random variable the caller did not declare.

Unexpanded

The IR still holds an array-level node (a run-time expansion bug).

VarWidthMismatch

The IR uses a random variable at a width other than its declaration.

Fields

var: VarId

The variable.

declared: u32

Its declared width.

used: u32

The width the expression reads it at.

Trait Implementations

impl Clone for BddBuildError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BddBuildError

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

Formats the value using the given formatter.

impl Display for BddBuildError

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

Formats the value using the given formatter.

impl Eq for BddBuildError

impl Error for BddBuildError

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.

impl From<BddBuildError> for SolveError

fn from(e: BddBuildError) -> Self

Converts to this type from the input type.

impl From<IrError> for BddBuildError

fn from(e: IrError) -> Self

Converts to this type from the input type.

impl PartialEq for BddBuildError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for BddBuildError