ValidationCtx

Struct ValidationCtx 

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pub struct ValidationCtx { /* private fields */ }
Expand description

A context for collecting validation error.

This is responsible for tracking the position in the tree at which a given error is reported.

§paths/locations

As validation travels down through the object graph, the path is recorded via appropriate calls to methods like in_table and in_field.

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impl ValidationCtx

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pub fn in_table( &mut self, name: &'static str, f: impl FnOnce(&mut ValidationCtx), )

Run the provided closer in the context of a new table.

Errors reported in the closure will include the provided identifier in their path.

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pub fn in_field( &mut self, name: &'static str, f: impl FnOnce(&mut ValidationCtx), )

Run the provided closer in the context of a new field.

Errors reported in the closure will be associated with the field.

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pub fn with_array_items<'a, T: 'a>( &mut self, iter: impl Iterator<Item = &'a T>, f: impl FnMut(&mut ValidationCtx, &T), )

Run the provided closer for each item in an array.

This handles tracking the active item, so that validation errors can be associated with the correct index.

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pub fn report(&mut self, msg: impl Display)

Report a new error, associating it with the current path.

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impl Clone for ValidationCtx

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fn clone(&self) -> ValidationCtx

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ValidationCtx

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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 Default for ValidationCtx

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fn default() -> ValidationCtx

Returns the “default value” for a type. Read more

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<U, T> ToOwnedObj<U> for T
where U: FromObjRef<T>,

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fn to_owned_obj(&self, data: FontData<'_>) -> U

Convert this type into T, using the provided data to resolve any offsets.
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impl<U, T> ToOwnedTable<U> for T
where U: FromTableRef<T>,

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fn to_owned_table(&self) -> U

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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.