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.

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