Enum cfg_expr::error::Reason

pub enum Reason {
    InvalidNot(usize),
    InvalidCharacters,
    UnclosedParens,
    UnopenedParens,
    UnclosedQuotes,
    UnopenedQuotes,
    Empty,
    Unexpected(&'static [&'static str]),
    InvalidInteger,
    MultipleRootPredicates,
    UnknownBuiltin,
}

The particular reason for a ParseError

Variants

InvalidNot

not() takes exactly 1 predicate, unlike all() and any()

Tuple Fields of InvalidNot

0: usize

InvalidCharacters

The characters are not valid in an cfg expression

UnclosedParens

An opening parens was unmatched with a closing parens

UnopenedParens

A closing parens was unmatched with an opening parens

UnclosedQuotes

An opening quotes was unmatched with a closing quotes

UnopenedQuotes

A closing quotes was unmatched with an opening quotes

Empty

The expression does not contain any valid terms

Unexpected

Found an unexpected term, which wasn’t one of the expected terms that is listed

Tuple Fields of Unexpected

0: &'static [&'static str]

InvalidInteger

Failed to parse an integer value

MultipleRootPredicates

The root cfg() may only contain a single predicate

UnknownBuiltin

An element was not part of the builtin information in rustc

Trait Implementations

impl Debug for Reason

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

Formats the value using the given formatter.

impl Display for Reason

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

Formats the value using the given formatter.

impl PartialEq<Reason> for Reason

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

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

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

This method tests for !=.

impl StructuralPartialEq for Reason