Struct Traversal

pub struct Traversal {
    pub expr: Expression,
    pub operators: Vec<TraversalOperator>,
}

Traverse an expression to access attributes, object keys or element indices.

Fields

expr: Expression

The expression that the access operator is applied to.

operators: Vec<TraversalOperator>

The traversal operators to apply to expr one of the other.

Implementations

impl Traversal

pub fn new<E, I>(expr: E, operators: I) -> Self

where E: Into<Expression>, I: IntoIterator, I::Item: Into<TraversalOperator>,

Creates a new Traversal structure from an expression and traversal operators that should be applied to it.

pub fn builder<T>(expr: T) -> TraversalBuilder

where T: Into<Expression>,

Create a new TraversalBuilder for the given expression.

Trait Implementations

impl Clone for Traversal

fn clone(&self) -> Traversal

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Traversal

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Traversal

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Evaluate for Traversal

type Output = Value

The type that is returned by evaluate on success.

fn evaluate(&self, ctx: &Context<'_>) -> EvalResult<Self::Output>

Recursively evaluates all HCL templates and expressions in the implementing type using the variables and functions declared in the Context.

fn evaluate_in_place(&mut self, ctx: &Context<'_>) -> EvalResult<(), Errors>

Recursively tries to evaluate all nested expressions in place.

impl Format for Traversal

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

where W: Write,

Formats a HCL structure using a formatter and writes the result to the provided writer.

fn format_vec<W>(&self, fmt: &mut Formatter<'_, W>) -> Result<Vec<u8>>

where W: Write + AsMut<Vec<u8>>,

Formats a HCL structure using a formatter and returns the result as a Vec<u8>.

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

where W: Write + AsMut<Vec<u8>>,

Formats a HCL structure using a formatter and returns the result as a String.

impl From<Traversal> for Expression

fn from(traversal: Traversal) -> Self

Converts to this type from the input type.

impl From<Traversal> for Traversal

fn from(value: Traversal) -> Self

Converts to this type from the input type.

impl From<Traversal> for Traversal

fn from(value: Traversal) -> Self

Converts to this type from the input type.

impl<'de> IntoDeserializer<'de, Error> for Traversal

type Deserializer = MapAccessDeserializer<TraversalAccess>

The type of the deserializer being converted into.

fn into_deserializer(self) -> Self::Deserializer

Convert this value into a deserializer.

impl PartialEq for Traversal

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Traversal

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Traversal

impl StructuralPartialEq for Traversal