Enum TacticError 

pub enum TacticError {
    NoGoals,
    DoesNotApply {
        tactic: &'static str,
        goal: Goal,
        why: String,
    },
    GoalsRemain(Vec<Goal>),
    Kernel(KernelError),
}

Why a tactic did nothing, or why there is no proof yet.

Variants

NoGoals

Every goal is closed.

DoesNotApply

The tactic does not apply to the focused goal.

Fields

tactic: &'static str

goal: Goal

why: String

GoalsRemain(Vec<Goal>)

qed with goals still open.

Kernel(KernelError)

The kernel refused a term: the statement at GoalState::new, the proof at GoalState::qed.

Trait Implementations

impl Debug for TacticError

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

Formats the value using the given formatter.

impl Display for TacticError

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

Formats the value using the given formatter.

impl Error for TacticError

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.