Trait ValueExt 

pub trait ValueExt {
    // Required methods
    fn jmespath_type(&self) -> JmespathType;
    fn is_truthy(&self) -> bool;
    fn get_field(&self, name: &str) -> Value;
    fn get_index(&self, idx: usize) -> Value;
    fn get_negative_index(&self, idx: usize) -> Value;
    fn slice(
        &self,
        start: Option<i32>,
        stop: Option<i32>,
        step: i32,
    ) -> Option<Vec<Value>>;
    fn compare(&self, comparator: &Comparator, other: &Value) -> Option<bool>;
    fn is_expref(&self) -> bool;
}

Extension trait providing JMESPath operations on serde_json::Value.

Required Methods

fn jmespath_type(&self) -> JmespathType

Returns the JMESPath type name.

fn is_truthy(&self) -> bool

Returns true if the value is “truthy” per the JMESPath spec.

• null is falsy
• false is falsy
• "" (empty string) is falsy
• [] (empty array) is falsy
• {} (empty object) is falsy
• Everything else is truthy

fn get_field(&self, name: &str) -> Value

Extracts a named field from an object; returns Value::Null if not found.

fn get_index(&self, idx: usize) -> Value

Extracts an element by positive index; returns Value::Null if out of range.

fn get_negative_index(&self, idx: usize) -> Value

Extracts an element by negative index (counting from end).

fn slice( &self, start: Option<i32>, stop: Option<i32>, step: i32, ) -> Option<Vec<Value>>

Slices an array with start/stop/step, per the JMESPath spec. Returns None if the value is not an array.

fn compare(&self, comparator: &Comparator, other: &Value) -> Option<bool>

Compares two values using a JMESPath comparator. Returns None if the comparison is not valid for these types.

fn is_expref(&self) -> bool

Returns true if this is an expref sentinel.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl ValueExt for Value

fn jmespath_type(&self) -> JmespathType

fn is_truthy(&self) -> bool

fn get_field(&self, name: &str) -> Value

fn get_index(&self, idx: usize) -> Value

fn get_negative_index(&self, idx: usize) -> Value

fn slice( &self, start: Option<i32>, stop: Option<i32>, step: i32, ) -> Option<Vec<Value>>

fn compare(&self, comparator: &Comparator, other: &Value) -> Option<bool>

fn is_expref(&self) -> bool

Implementors