Struct versions::Mess

pub struct Mess {
    pub chunks: Vec<MChunk>,
    pub next: Option<(Sep, Box<Mess>)>,
}

A complex version number with no specific structure.

Like Version this is a descriptive scheme, but it is based on examples of stupidly crafted, near-lawless version numbers used in the wild. Versions like this are a considerable burden to package management software.

With Mess, groups of letters/numbers are separated by a period, but can be further separated by the symbols _-+:.

Unfortunately, Chunk cannot be used here, as some developers have numbers like 1.003.04 which make parsers quite sad.

Some Mess values have a shape that is tantalizingly close to a SemVer. Example: 1.6.0a+2014+m872b87e73dfb-1. For values like these, we can extract the SemVer-compatible values out with Mess::nth.

In general this is not guaranteed to have well-defined ordering behaviour, but existing tests show sufficient consistency. Mess::nth is used internally where appropriate to enhance accuracy.

Examples

use versions::{Mess, SemVer, Version};

let mess = "20.0026.1_0-2+0.93";

let s = SemVer::new(mess);
let v = Version::new(mess);
let m = Mess::new(mess);

assert!(s.is_none());
assert!(v.is_none());
assert_eq!(Some(mess.to_string()), m.map(|v| format!("{}", v)));

Fields

chunks: Vec<MChunk>

The first section of a Mess.

next: Option<(Sep, Box<Mess>)>

The rest of the Mess.

Implementations

impl Mess

pub fn new(s: &str) -> Option<Mess>

Parse a Mess from some input.

pub fn nth(&self, x: usize) -> Option<u32>

Try to extract a position from the Mess as a nice integer, as if it were a SemVer.

use versions::Mess;

let mess = Mess::new("1.6a.0+2014+m872b87e73dfb-1").unwrap();
assert_eq!(Some(1), mess.nth(0));
assert_eq!(None, mess.nth(1));
assert_eq!(Some(0), mess.nth(2));

pub fn parse(i: &str) -> IResult<&str, Mess>

The raw nom parser for Mess. Feel free to use this in combination with other general nom parsers.

Trait Implementations

impl Clone for Mess

fn clone(&self) -> Mess

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Mess

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

Formats the value using the given formatter.

impl Default for Mess

fn default() -> Mess

Returns the “default value” for a type.

impl Display for Mess

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

Formats the value using the given formatter.

impl FromStr for Mess

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Mess

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Mess

Build metadata does not affect version precendence, and pre-release versions have lower precedence than normal versions.

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Mess

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Mess

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<&str> for Mess

fn try_from(value: &str) -> Result<Self, Self::Error>

use versions::Mess;

let orig = "1.2.3.4_123_abc+101a";
let prsd: Mess = orig.try_into().unwrap();
assert_eq!(orig, prsd.to_string());

type Error = Error

The type returned in the event of a conversion error.

impl Eq for Mess

impl StructuralPartialEq for Mess