Enum Polarity 

pub enum Polarity {
    Ifdef,
    Ifndef,
}

2026-09-30: Whether a guarded region compiles when its macro is defined or when it is not.

Variants

Ifdef

2026-09-30: #ifdef M / #if defined(M): compiled only where M is defined.

Ifndef

2026-09-30: #ifndef M: compiled only where M is not defined.

Trait Implementations

impl Clone for Polarity

fn clone(&self) -> Polarity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Polarity

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

Formats the value using the given formatter.

impl PartialEq for Polarity

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Polarity

impl Eq for Polarity

impl StructuralPartialEq for Polarity