Struct evalexpr::EmptyContext

pub struct EmptyContext;

A context that returns None for each identifier.

Trait Implementations

impl Context for EmptyContext

fn get_value(&self, _identifier: &str) -> Option<&Value>

Returns the value that is linked to the given identifier.

fn call_function(
    &self,
    identifier: &str,
    _argument: &Value
) -> EvalexprResult<Value>

Calls the function that is linked to the given identifier with the given argument. If no function with the given identifier is found, this method returns EvalexprError::FunctionIdentifierNotFound.

impl Debug for EmptyContext

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

Formats the value using the given formatter.

impl Default for EmptyContext

fn default() -> EmptyContext

Returns the “default value” for a type.