Enum cfg_expr::expr::lexer::Token

pub enum Token<'a> {
    Key(&'a str),
    Value(&'a str),
    Equals,
    All,
    Any,
    Not,
    OpenParen,
    CloseParen,
    Comma,
}

A single token in a cfg expression https://doc.rust-lang.org/reference/conditional-compilation.html

Variants

Key(&'a str)

A single contiguous term

Value(&'a str)

A single continguous value, without its surrounding quotes

Equals

A ‘=’, joining a key and a value

All

Beginning of an all() predicate list

Any

Beginning of an any() predicate list

Not

Beginning of a not() predicate

OpenParen

A ( for starting a predicate list

CloseParen

A ) for ending a predicate list

Comma

A , for separating predicates in a predicate list

Trait Implementations

impl<'a> Clone for Token<'a>

fn clone(&self) -> Token<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Token<'a>

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

Formats the value using the given formatter.

impl<'a> Display for Token<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq<Token<'a>> for Token<'a>

fn eq(&self, other: &Token<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl<'a> Eq for Token<'a>

impl<'a> StructuralEq for Token<'a>

impl<'a> StructuralPartialEq for Token<'a>