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auto merge of #9413 : bytbox/rust/master, r=alexcrichton

This commit is contained in:
bors 2013-09-22 20:20:52 -07:00
parent 8c45423a8a a5cf9fdb61
commit 40834a0c23
1 changed files with 30 additions and 4 deletions
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34
src/libextra/semver.rs
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@ -8,10 +8,25 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Semver parsing and logic
#[allow(missing_doc)];
//! Semantic version parsing and comparison.
//!
//! Semantic versioning (see http://semver.org/) is a set of rules for
//! assigning version numbers intended to convey meaning about what has
//! changed, and how much. A version number has five parts:
//!
//! * Major number, updated for incompatible API changes
//! * Minor number, updated for backwards-compatible API additions
//! * Patch number, updated for backwards-compatible bugfixes
//! * Pre-release information (optional), preceded by a hyphen (`-`)
//! * Build metadata (optional), preceded by a plus sign (`+`)
//!
//! The three mandatory components are required to be decimal numbers. The
//! pre-release information and build metadata are required to be a
//! period-separated list of identifiers containing only alphanumeric
//! characters and hyphens.
//!
//! An example version number with all five components is
//! `0.8.1-rc.3.0+20130922.linux`.
use std::char;
use std::cmp;
@ -20,6 +35,8 @@ use std::io;
use std::option::{Option, Some, None};
use std::to_str::ToStr;
/// An identifier in the pre-release or build metadata. If the identifier can
/// be parsed as a decimal value, it will be represented with `Numeric`.
#[deriving(Clone, Eq)]
pub enum Identifier {
Numeric(uint),
@ -49,12 +66,20 @@ impl ToStr for Identifier {
}
/// Represents a version number conforming to the semantic versioning scheme.
#[deriving(Clone, Eq)]
pub struct Version {
/// The major version, to be incremented on incompatible changes.
major: uint,
/// The minor version, to be incremented when functionality is added in a
/// backwards-compatible manner.
minor: uint,
/// The patch version, to be incremented when backwards-compatible bug
/// fixes are made.
patch: uint,
/// The pre-release version identifier, if one exists.
pre: ~[Identifier],
/// The build metadata, ignored when determining version precedence.
build: ~[Identifier],
}
@ -202,6 +227,7 @@ fn parse_reader(rdr: @io::Reader) -> Version {
}
/// Parse a string into a semver object.
pub fn parse(s: &str) -> Option<Version> {
if !s.is_ascii() {
return None;