Trait TriboolExt 

pub trait TriboolExt<T> {
    // Required methods
    fn define(&self, default: Option<T>) -> Option<T>
       where T: Clone;
    fn apply_to_json(&self, obj: &mut Map<String, JsonValue>, key: &str) -> bool
       where T: Into<JsonValue> + Clone;
    fn apply_to_json_value(&self, obj: &mut JsonValue, key: &str) -> bool
       where T: Into<JsonValue> + Clone;
}

Extension trait for Option that adds tribool-like functionality

Required Methods

fn define(&self, default: Option<T>) -> Option<T>

where T: Clone,

Define a value if the current value is None (undefined)

Similar to the tribool.define() function in C++, this method will set the value to the provided default only if the current value is None.

Arguments

• default - The value to use if self is None

Returns

The existing value if Some, otherwise the default value

fn apply_to_json(&self, obj: &mut Map<String, JsonValue>, key: &str) -> bool

where T: Into<JsonValue> + Clone,

Apply this tribool value to a JSON object if it’s defined (Some)

Arguments

• obj - The JSON object to modify
• key - The key to set in the JSON object

Returns

true if the value was applied, false if it was undefined (None)

fn apply_to_json_value(&self, obj: &mut JsonValue, key: &str) -> bool

where T: Into<JsonValue> + Clone,

Apply this tribool value to a JSON Value object if it’s defined (Some)

Arguments

• obj - The JSON Value object to modify (must be an object type)
• key - The key to set in the JSON object

Returns

true if the value was applied, false if it was undefined (None) or the target wasn’t a JSON object

Implementations on Foreign Types

impl<T> TriboolExt<T> for Option<T>

fn define(&self, default: Option<T>) -> Option<T>

where T: Clone,

fn apply_to_json(&self, obj: &mut Map<String, JsonValue>, key: &str) -> bool

where T: Into<JsonValue> + Clone,

fn apply_to_json_value(&self, obj: &mut JsonValue, key: &str) -> bool

where T: Into<JsonValue> + Clone,

Implementors