Enum CfgExpr 

pub enum CfgExpr {
    Invalid,
    Atom(CfgAtom),
    All(Box<[CfgExpr]>),
    Any(Box<[CfgExpr]>),
    Not(Box<CfgExpr>),
}

Variants

Invalid

Atom(CfgAtom)

All(Box<[CfgExpr]>)

Any(Box<[CfgExpr]>)

Not(Box<CfgExpr>)

Implementations

impl CfgExpr

pub fn parse<S>(tt: &TopSubtree<S>) -> CfgExpr

where S: Copy,

pub fn parse_from_iter<S>(tt: &mut TtIter<'_, S>) -> CfgExpr

where S: Copy,

pub fn parse_from_ast(ast: &mut Peekable<TokenTreeChildren>) -> CfgExpr

pub fn fold(&self, query: &dyn Fn(&CfgAtom) -> bool) -> Option<bool>

Fold the cfg by querying all basic Atom and KeyValue predicates.

Trait Implementations

impl Clone for CfgExpr

fn clone(&self) -> CfgExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CfgExpr

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

Formats the value using the given formatter.

impl From<CfgAtom> for CfgExpr

fn from(atom: CfgAtom) -> CfgExpr

Converts to this type from the input type.

impl Hash for CfgExpr

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CfgExpr

fn eq(&self, other: &CfgExpr) -> 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 Eq for CfgExpr

impl StructuralPartialEq for CfgExpr