Enum hcl::expr::TraversalOperator

pub enum TraversalOperator {
    AttrSplat,
    FullSplat,
    GetAttr(Identifier),
    Index(Expression),
    LegacyIndex(u64),
}

The expression traversal operators that are supported by HCL.

Variants

AttrSplat

The attribute-only splat operator supports only attribute lookups into the elements from a list, but supports an arbitrary number of them.

FullSplat

The full splat operator additionally supports indexing into the elements from a list, and allows any combination of attribute access and index operations.

GetAttr(Identifier)

The attribute access operator returns the value of a single attribute in an object value.

Index(Expression)

The index operator returns the value of a single element of a collection value based on the result of the expression.

LegacyIndex(u64)

The legacy index operator returns the value of a single element of a collection value. Exists only for compatibility with the precursor language HIL. Use the Index variant instead.

Trait Implementations

impl Clone for TraversalOperator

fn clone(&self) -> TraversalOperator

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TraversalOperator

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TraversalOperator

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
    __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserializer<'de> for TraversalOperator

type Error = Error

The error type that can be returned if some error occurs during deserialization.

fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input.

fn deserialize_enum<V>(
    self,
    _name: &'static str,
    _variants: &'static [&'static str],
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.

fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a bool value.

fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an i8 value.

fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an i16 value.

fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an i32 value.

fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an i64 value.

fn deserialize_i128<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an i128 value.

fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a u8 value.

fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a u16 value.

fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a u32 value.

fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a u64 value.

fn deserialize_u128<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an u128 value.

fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a f32 value.

fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a f64 value.

fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a char value.

fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting an optional value.

fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a unit value.

fn deserialize_unit_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a unit struct with a particular name.

fn deserialize_newtype_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a newtype struct with a particular name.

fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a sequence of values.

fn deserialize_tuple<V>(
    self,
    len: usize,
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.

fn deserialize_tuple_struct<V>(
    self,
    name: &'static str,
    len: usize,
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.

fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a map of key-value pairs.

fn deserialize_struct<V>(
    self,
    name: &'static str,
    fields: &'static [&'static str],
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting a struct with a particular name and fields.

fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.

fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored.

fn is_human_readable(&self) -> bool

Determine whether Deserialize implementations should expect to deserialize their human-readable form.

impl<'de> EnumAccess<'de> for TraversalOperator

type Error = Error

The error type that can be returned if some error occurs during deserialization.

type Variant = TraversalOperator

The Visitor that will be used to deserialize the content of the enum variant.

fn variant_seed<T>(
    self,
    seed: T
) -> Result<(T::Value, Self::Variant), Self::Error>where
    T: DeserializeSeed<'de>,

variant is called to identify which variant to deserialize.

fn variant<V>(self) -> Result<(V, Self::Variant), Self::Error>where
    V: Deserialize<'de>,

variant is called to identify which variant to deserialize.

impl Format for TraversalOperator

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<Expression> for TraversalOperator

fn from(value: Expression) -> TraversalOperator

Converts to this type from the input type.

impl<T> From<T> for TraversalOperatorwhere
    T: Into<Identifier>,

fn from(value: T) -> TraversalOperator

Converts to this type from the input type.

impl From<u64> for TraversalOperator

fn from(value: u64) -> TraversalOperator

Converts to this type from the input type.

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

type Deserializer = TraversalOperator

The type of the deserializer being converted into.

fn into_deserializer(self) -> Self::Deserializer

Convert this value into a deserializer.

impl PartialEq<TraversalOperator> for TraversalOperator

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

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

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.

impl Serialize for TraversalOperator

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>where
    __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'de> VariantAccess<'de> for TraversalOperator

type Error = Error

The error type that can be returned if some error occurs during deserialization. Must match the error type of our EnumAccess.

fn unit_variant(self) -> Result<(), Self::Error>

Called when deserializing a variant with no values.

fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>where
    T: DeserializeSeed<'de>,

Called when deserializing a variant with a single value.

fn tuple_variant<V>(
    self,
    _len: usize,
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Called when deserializing a tuple-like variant.

fn struct_variant<V>(
    self,
    _fields: &'static [&'static str],
    visitor: V
) -> Result<V::Value, Self::Error>where
    V: Visitor<'de>,

Called when deserializing a struct-like variant.

fn newtype_variant<T>(self) -> Result<T, Self::Error>where
    T: Deserialize<'de>,

Called when deserializing a variant with a single value.

impl Eq for TraversalOperator

impl StructuralEq for TraversalOperator

impl StructuralPartialEq for TraversalOperator