Enum cfg_expr::error::Reason

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

The particular reason for a ParseError

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InvalidNot(usize)

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

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InvalidCharacters

The characters are not valid in an cfg expression

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UnclosedParens

An opening parens was unmatched with a closing parens

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UnopenedParens

A closing parens was unmatched with an opening parens

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UnclosedQuotes

An opening quotes was unmatched with a closing quotes

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UnopenedQuotes

A closing quotes was unmatched with an opening quotes

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Empty

The expression does not contain any valid terms

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Unexpected(&'static [&'static str])

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

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InvalidInteger

Failed to parse an integer value

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MultipleRootPredicates

The root cfg() may only contain a single predicate

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InvalidHasAtomic

A target_has_atomic predicate didn’t correctly parse.

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UnknownBuiltin

An element was not part of the builtin information in rustc

Trait Implementations§

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impl Debug for Reason

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

Formats the value using the given formatter. Read more
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impl Display for Reason

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

Formats the value using the given formatter. Read more
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impl PartialEq for Reason

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

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

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impl StructuralEq for Reason

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impl StructuralPartialEq for Reason

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.