Struct Bool 

pub struct Bool;

Returns true if the given value is “truthy”.

For each type, the following values are considered “truthy”:

• Float: any value except 0.0 and NaN
• Integer: any value except 0
• Complex: any value except 0.0 + 0.0i and NaN + NaNi
• Bool: true
• Unit: never true; always false
• List: lists with at least one element; element(s) does not have to be truthy
• Function: always true

Implementations

impl Bool

pub fn eval_static(v: Value) -> bool

Trait Implementations

impl Builtin for Bool

fn name(&self) -> &'static str

Returns the name of the function.

fn sig(&self) -> &'static [BuiltinParam]

The function’s signature, indicating all parameters, whether they are required or optional, and the expected typenames.

fn sig_str(&self) -> &'static str

The function’s signature as a string, used for error messages.

fn eval( &self, trig_mode: TrigMode, args: Vec<Value>, ) -> Result<Value, BuiltinError>

Evaluates the function.

impl Debug for Bool

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

Formats the value using the given formatter.