Visitor

xmlity::de

Trait Visitor 

Source 
pub trait Visitor<'de>: Sized {
    type Value: Deserialize<'de>;

    // Required method
    fn expecting(&self, formatter: &mut Formatter<'_>) -> Result;

    // Provided methods
    fn visit_text<E, V>(self, value: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlText<'de> { ... }
    fn visit_cdata<E, V>(self, value: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlCData<'de> { ... }
    fn visit_element<A>(self, element: A) -> Result<Self::Value, A::Error>
       where A: ElementAccess<'de> { ... }
    fn visit_attribute<A>(self, attribute: A) -> Result<Self::Value, A::Error>
       where A: AttributeAccess<'de> { ... }
    fn visit_seq<S>(self, sequence: S) -> Result<Self::Value, S::Error>
       where S: SeqAccess<'de> { ... }
    fn visit_pi<E, V>(self, pi: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlProcessingInstruction { ... }
    fn visit_decl<E, V>(self, declaration: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlDeclaration { ... }
    fn visit_comment<E, V>(self, comment: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlComment<'de> { ... }
    fn visit_doctype<E, V>(self, doctype: V) -> Result<Self::Value, E>
       where E: Error,
             V: XmlDoctype<'de> { ... }
    fn visit_none<E>(self) -> Result<Self::Value, E>
       where E: Error { ... }
}
Expand description

Visitor trait that lets you define how to handle different types of XML nodes.

Required Associated Types§

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type Value: Deserialize<'de>

The type of value that this visitor will produce.

Required Methods§

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fn expecting(&self, formatter: &mut Formatter<'_>) -> Result

Returns a description of the type that this visitor expects.

Provided Methods§

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fn visit_text<E, V>(self, value: V) -> Result<Self::Value, E>
where E: Error, V: XmlText<'de>,

Visits an XML text node.

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fn visit_cdata<E, V>(self, value: V) -> Result<Self::Value, E>
where E: Error, V: XmlCData<'de>,

Visits an XML CDATA node.

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fn visit_element<A>(self, element: A) -> Result<Self::Value, A::Error>
where A: ElementAccess<'de>,

Visits an XML element.

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fn visit_attribute<A>(self, attribute: A) -> Result<Self::Value, A::Error>
where A: AttributeAccess<'de>,

Visits an XML attribute.

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fn visit_seq<S>(self, sequence: S) -> Result<Self::Value, S::Error>
where S: SeqAccess<'de>,

Visits a sequence of values.

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fn visit_pi<E, V>(self, pi: V) -> Result<Self::Value, E>
where E: Error, V: XmlProcessingInstruction,

Visits an XML PI node.

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fn visit_decl<E, V>(self, declaration: V) -> Result<Self::Value, E>
where E: Error, V: XmlDeclaration,

Visits a declaration.

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fn visit_comment<E, V>(self, comment: V) -> Result<Self::Value, E>
where E: Error, V: XmlComment<'de>,

Visits a comment.

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fn visit_doctype<E, V>(self, doctype: V) -> Result<Self::Value, E>
where E: Error, V: XmlDoctype<'de>,

Visits a doctype declaration.

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fn visit_none<E>(self) -> Result<Self::Value, E>
where E: Error,

Visits nothing. This is used when a value is not present.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§