Struct ra_ap_cfg::DnfExpr

pub struct DnfExpr { /* fields omitted */ }

A #[cfg] directive in Disjunctive Normal Form (DNF).

Implementations

impl DnfExpr

pub fn new(expr: CfgExpr) -> Self

pub fn why_inactive(&self, opts: &CfgOptions) -> Option<InactiveReason>

Computes a list of present or absent atoms in opts that cause this expression to evaluate to false.

Note that flipping a subset of these atoms might be sufficient to make the whole expression evaluate to true. For that, see compute_enable_hints.

Returns None when self is already true, or contains errors.

pub fn compute_enable_hints<'a>(
    &'a self,
    opts: &'a CfgOptions
) -> impl Iterator<Item = CfgDiff> + 'a

Returns CfgDiff objects that would enable this directive if applied to opts.

Trait Implementations

impl Display for DnfExpr

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

Formats the value using the given formatter.