Struct Roman 

pub struct Roman { /* private fields */ }

A sequence of Roman numerals.

Implementations

impl Roman

pub fn parse(input: &str) -> Option<Self>

Parses a string of characters into a sequence of numerals. Returns None if there’s a character in the input string that doesn’t map to a numeral.

This accepts either uppercase or lowercase ASCII characters.

pub fn value(&self) -> i16

Converts this string of numerals into a i32 actual number.

Panics

• This function panics when passed in a negative number or zero, as the Romans didn’t have a way to write those down!

pub fn value_checked(&self) -> Option<i16>

Converts this string of numerals into a i32 actual number. Unlike value, this returns None on numbers that can’t be converted to an i32.

Trait Implementations

impl Debug for Roman

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

Formats the value using the given formatter.

impl From<Vec<Numeral>> for Roman

fn from(numerals: Vec<Numeral>) -> Self

Converts to this type from the input type.

impl From<i16> for Roman

fn from(number: i16) -> Self

Converts to this type from the input type.

impl LowerHex for Roman

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

Formats the value using the given formatter.

impl PartialEq for Roman

fn eq(&self, other: &Roman) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl UpperHex for Roman

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

Formats the value using the given formatter.

impl StructuralPartialEq for Roman