Struct semver::Version

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pub struct Version {
    pub major: u64,
    pub minor: u64,
    pub patch: u64,
    pub pre: Prerelease,
    pub build: BuildMetadata,
}
Expand description

SemVer version as defined by https://semver.org.

§Syntax

  • The major, minor, and patch numbers may be any integer 0 through u64::MAX. When representing a SemVer version as a string, each number is written as a base 10 integer. For example, 1.0.119.

  • Leading zeros are forbidden in those positions. For example 1.01.00 is invalid as a SemVer version.

  • The pre-release identifier, if present, must conform to the syntax documented for Prerelease.

  • The build metadata, if present, must conform to the syntax documented for BuildMetadata.

  • Whitespace is not allowed anywhere in the version.

§Total ordering

Given any two SemVer versions, one is less than, greater than, or equal to the other. Versions may be compared against one another using Rust’s usual comparison operators.

  • The major, minor, and patch number are compared numerically from left to right, lexicographically ordered as a 3-tuple of integers. So for example version 1.5.0 is less than version 1.19.0, despite the fact that “1.19.0” < “1.5.0” as ASCIIbetically compared strings and 1.19 < 1.5 as real numbers.

  • When major, minor, and patch are equal, a pre-release version is considered less than the ordinary release: version 1.0.0-alpha.1 is less than version 1.0.0.

  • Two pre-releases of the same major, minor, patch are compared by lexicographic ordering of dot-separated components of the pre-release string.

    • Identifiers consisting of only digits are compared numerically: 1.0.0-pre.8 is less than 1.0.0-pre.12.

    • Identifiers that contain a letter or hyphen are compared in ASCII sort order: 1.0.0-pre12 is less than 1.0.0-pre8.

    • Any numeric identifier is always less than any non-numeric identifier: 1.0.0-pre.1 is less than 1.0.0-pre.x.

Example: 1.0.0-alpha < 1.0.0-alpha.1 < 1.0.0-alpha.beta < 1.0.0-beta < 1.0.0-beta.2 < 1.0.0-beta.11 < 1.0.0-rc.1 < 1.0.0

Fields§

§major: u64§minor: u64§patch: u64§pre: Prerelease§build: BuildMetadata

Implementations§

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impl Version

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pub const fn new(major: u64, minor: u64, patch: u64) -> Self

Create Version with an empty pre-release and build metadata.

Equivalent to:

Version {
    major,
    minor,
    patch,
    pre: Prerelease::EMPTY,
    build: BuildMetadata::EMPTY,
}
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pub fn parse(text: &str) -> Result<Self, Error>

Create Version by parsing from string representation.

§Errors

Possible reasons for the parse to fail include:

  • 1.0 — too few numeric components. A SemVer version must have exactly three. If you are looking at something that has fewer than three numbers in it, it’s possible it is a VersionReq instead (with an implicit default ^ comparison operator).

  • 1.0.01 — a numeric component has a leading zero.

  • 1.0.unknown — unexpected character in one of the components.

  • 1.0.0- or 1.0.0+ — the pre-release or build metadata are indicated present but empty.

  • 1.0.0-alpha_123 — pre-release or build metadata have something outside the allowed characters, which are 0-9, A-Z, a-z, -, and . (dot).

  • 23456789999999999999.0.0 — overflow of a u64.

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

Compare the major, minor, patch, and pre-release value of two versions, disregarding build metadata. Versions that differ only in build metadata are considered equal. This comparison is what the SemVer spec refers to as “precedence”.

§Example
use semver::Version;

let mut versions = [
    "1.20.0+c144a98".parse::<Version>().unwrap(),
    "1.20.0".parse().unwrap(),
    "1.0.0".parse().unwrap(),
    "1.0.0-alpha".parse().unwrap(),
    "1.20.0+bc17664".parse().unwrap(),
];

// This is a stable sort, so it preserves the relative order of equal
// elements. The three 1.20.0 versions differ only in build metadata so
// they are not reordered relative to one another.
versions.sort_by(Version::cmp_precedence);
assert_eq!(versions, [
    "1.0.0-alpha".parse().unwrap(),
    "1.0.0".parse().unwrap(),
    "1.20.0+c144a98".parse().unwrap(),
    "1.20.0".parse().unwrap(),
    "1.20.0+bc17664".parse().unwrap(),
]);

// Totally order the versions, including comparing the build metadata.
versions.sort();
assert_eq!(versions, [
    "1.0.0-alpha".parse().unwrap(),
    "1.0.0".parse().unwrap(),
    "1.20.0".parse().unwrap(),
    "1.20.0+bc17664".parse().unwrap(),
    "1.20.0+c144a98".parse().unwrap(),
]);

Trait Implementations§

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impl Clone for Version

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fn clone(&self) -> Version

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Version

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for Version

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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Display for Version

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

Formats the value using the given formatter. Read more
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impl FromStr for Version

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type Err = Error

The associated error which can be returned from parsing.
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fn from_str(text: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for Version

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Version

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

This method returns an Ordering between self and other. Read more
1.21.0 · source§

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

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Version

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Serialize for Version

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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for Version

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impl StructuralPartialEq for Version

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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Creates owned data from borrowed data, usually by cloning. Read more
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Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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Performs the conversion.
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where T: for<'de> Deserialize<'de>,