Enum version_compare::comp_op::CompOp[−][src]

pub enum CompOp {
    Eq,
    Ne,
    Lt,
    Le,
    Ge,
    Gt,
}

Expand description

Enum of supported comparison operators.

Variants

Eq

Equal (==, =). When version A is equal to B.

Ne

Not equal (!=, !, <>). When version A is not equal to B.

Lt

Less than (<). When version A is less than B but not equal.

Le

Less or equal (<=). When version A is less than or equal to B.

Ge

Greater or equal (>=). When version A is greater than or equal to B.

Gt

Greater than (>). When version A is greater than B but not equal.

Implementations

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impl CompOp

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pub fn from_sign(sign: &str) -> Result<CompOp, ()>

Get a comparison operator by it’s sign. Whitespaces are stripped from the sign string. An error is returned if the sign isn’t recognized.

The following signs are supported:

== or = -> Eq
!= or ! or <> -> Ne
< -> Lt
<= -> Le
>= -> Ge
> -> Gt

Examples

use version_compare::CompOp;

assert_eq!(CompOp::from_sign("=="), Ok(CompOp::Eq));
assert_eq!(CompOp::from_sign("<"), Ok(CompOp::Lt));
assert_eq!(CompOp::from_sign("  >=   "), Ok(CompOp::Ge));
assert!(CompOp::from_sign("*").is_err());

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pub fn from_name(sign: &str) -> Result<CompOp, ()>

Get a comparison operator by it’s name. Names are case-insensitive, and whitespaces are stripped from the string. An error is returned if the name isn’t recognized.

Examples

use version_compare::CompOp;

assert_eq!(CompOp::from_name("eq"), Ok(CompOp::Eq));
assert_eq!(CompOp::from_name("lt"), Ok(CompOp::Lt));
assert_eq!(CompOp::from_name("  Ge   "), Ok(CompOp::Ge));
assert!(CompOp::from_name("abc").is_err());

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pub fn from_ord(ord: Ordering) -> CompOp

Get the comparison operator from Rusts Ordering enum.

The following comparison operators are returned:

Ordering::Less -> Lt
Ordering::Equal -> Eq
Ordering::Greater -> Gt

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pub fn name(&self) -> &str

Get the name of this comparison operator.

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.name(), "eq");
assert_eq!(CompOp::Lt.name(), "lt");
assert_eq!(CompOp::Ge.name(), "ge");

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pub fn as_inverted(&self) -> Self

Covert to the inverted comparison operator.

This uses the following bidirectional rules:

Eq <-> Ne
Lt <-> Ge
Le <-> Gt

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.as_inverted(), CompOp::Ne);
assert_eq!(CompOp::Lt.as_inverted(), CompOp::Ge);
assert_eq!(CompOp::Gt.as_inverted(), CompOp::Le);

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pub fn invert(&self) -> Self

Get the inverted comparison operator.

This uses the following bidirectional rules:

Eq <-> Ne
Lt <-> Ge
Le <-> Gt

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.invert(), CompOp::Ne);
assert_eq!(CompOp::Lt.invert(), CompOp::Ge);
assert_eq!(CompOp::Gt.invert(), CompOp::Le);

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pub fn as_opposite(&self) -> Self

Convert to the opposite comparison operator.

This uses the following bidirectional rules:

Eq <-> Ne
Lt <-> Gt
Le <-> Ge

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.as_opposite(), CompOp::Ne);
assert_eq!(CompOp::Lt.as_opposite(), CompOp::Gt);
assert_eq!(CompOp::Ge.as_opposite(), CompOp::Le);

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pub fn opposite(&self) -> Self

Get the opposite comparison operator.

This uses the following bidirectional rules:

Eq <-> Ne
Lt <-> Gt
Le <-> Ge

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.opposite(), CompOp::Ne);
assert_eq!(CompOp::Lt.opposite(), CompOp::Gt);
assert_eq!(CompOp::Ge.opposite(), CompOp::Le);

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pub fn as_flipped(&self) -> Self

Convert to the flipped comparison operator.

This uses the following bidirectional rules:

Lt <-> Gt
Le <-> Ge
Other operators are returned as is.

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.as_flipped(), CompOp::Eq);
assert_eq!(CompOp::Lt.as_flipped(), CompOp::Gt);
assert_eq!(CompOp::Ge.as_flipped(), CompOp::Le);

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pub fn flip(&self) -> Self

Get the flipped comparison operator.

This uses the following bidirectional rules:

Lt <-> Gt
Le <-> Ge
Other operators are returned as is.

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.flip(), CompOp::Eq);
assert_eq!(CompOp::Lt.flip(), CompOp::Gt);
assert_eq!(CompOp::Ge.flip(), CompOp::Le);

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pub fn sign(&self) -> &'static str

Get the sign for this comparison operator.

The following signs are returned:

Eq -> ==
Ne -> !=
Lt -> <
Le -> <=
Ge -> >=
Gt -> >

Note: Some comparison operators also support other signs, such as = for Eq and ! for Ne, these are never returned by this method however as the table above is used.

Examples

use version_compare::CompOp;

assert_eq!(CompOp::Eq.sign(), "==");
assert_eq!(CompOp::Lt.sign(), "<");
assert_eq!(CompOp::Ge.flip().sign(), "<=");

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pub fn factor(&self) -> i8

Get a factor (number) for this comparison operator. These factors can be useful for quick calculations.

The following factor numbers are returned:

Eq or Ne -> 0
Lt or Le -> -1
Gt or Ge -> 1

Examples

use version_compare::Version;

let ver_a = Version::from("1.2.3").unwrap();
let ver_b = Version::from("1.3").unwrap();

assert_eq!(ver_a.compare(&ver_b).factor(), -1);
assert_eq!(10 * ver_b.compare(&ver_a).factor(), 10);

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pub fn ord(&self) -> Option<Ordering>

Get Rust’s ordering for this comparison operator.

The following comparison operators are supported:

Eq -> Ordering::Equal
Lt -> Ordering::Less
Gt -> Ordering::Greater

For other comparison operators None is returned.

Examples

use std::cmp::Ordering;
use version_compare::Version;

let ver_a = Version::from("1.2.3").unwrap();
let ver_b = Version::from("1.3").unwrap();

assert_eq!(ver_a.compare(&ver_b).ord().unwrap(), Ordering::Less);