Struct partial_function::LowerPartialFunction

pub struct LowerPartialFunction<B, O> where
    B: PartialOrd,  { /* fields omitted */ }

A lower partial function is a function that is defined by segments valid from [x..infinite[, or until it hits another function's start. It starts searching at -infinity and goes up to infinity, and takes the last seen function that contains the desired invariable value (x).

Example: [0..infinity[ = 5 [1..infinity[ = 10

f(0.5) = 5 f(1) = 10 f(70) = 10

Implementations

impl<B, O> LowerPartialFunction<B, O> where
    B: PartialOrd, 

pub fn new() -> LowerPartialFunctionBuilder<B, O>

Creates a new LowerPartialFunctionBuilder.

pub fn eval(&self, x: B) -> Option<O>

Evaluates the partial function. Returns None if no function is defined for the searched invariable value (x).