SubstIf

derive_deftly_macros::syntax

Struct SubstIf 

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pub struct SubstIf<O: SubstParseContext> {
    pub tests: Vec<(Subst<BooleanContext>, Template<O>)>,
    pub otherwise: Option<Box<Template<O>>>,
    pub kw_span: Span,
}

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§tests: Vec<(Subst<BooleanContext>, Template<O>)>

A series of test/result pairs.

The test that gives “true” short-circuits the rest.

§otherwise: Option<Box<Template<O>>>

A final element to expand if all tests fail.

§kw_span: Span

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impl<O> SubstIf<O>
where Template<O>: ExpandInfallible<O>, O: ExpansionOutput,

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fn expand_select1<'c>(&self, ctx: GeneralContext<'c>, out: &mut O) -> Result<()>

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impl<O: SubstParseContext> SubstIf<O>

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fn parse(input: ParseStream<'_>, kw_span: Span) -> Result<Self>

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impl<O: SubstParseContext> AnalyseRepeat for SubstIf<O>

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fn analyse_repeat(&self, visitor: &mut RepeatAnalysisVisitor) -> Result<()>

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impl<O: Debug + SubstParseContext> Debug for SubstIf<O>

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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<O> Expand<O> for SubstIf<O>
where Template<O>: ExpandInfallible<O>, O: ExpansionOutput,

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fn expand<'c>(&self, ctx: GeneralContext<'c>, out: &mut O) -> Result<()>

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impl<O: SubstParseContext> FindRecogMetas for SubstIf<O>

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fn find_recog_metas(&self, acc: &mut Recognised)

Search for fmeta(..) etc. expansions Read more

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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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.