Function split_canonical_version 

pub fn split_canonical_version(version: &str) -> Option<(&str, Option<&str>)>

Splits the full version into its canonical version and the remaining version suffix, as used by canonical interface names in the component model.

The returned canonical version and version suffix are subslices of version whose concatenation is version. In a canonical interface name the canonical version is the version in the name, e.g. the 0.2 in a:b/c@0.2, and the version suffix, if any, is its versionsuffix. With version of the form major.minor.patch(-pre)(+build) the canonical version is:

• major, if there’s no -pre and major isn’t 0.
• 0.minor, if there’s no -pre and minor isn’t 0.
• version without +build otherwise, i.e. for 0.0.patch or when there’s a -pre.

The version suffix is the rest of version, which always includes the +build, or None if that’s empty.

Returns None if version isn’t a valid semantic version.

Examples

use wasmparser::names::split_canonical_version;

assert_eq!(split_canonical_version("1.2.3+abc"), Some(("1", Some(".2.3+abc"))));
assert_eq!(split_canonical_version("0.2.1"), Some(("0.2", Some(".1"))));
assert_eq!(split_canonical_version("0.0.1"), Some(("0.0.1", None)));
assert_eq!(split_canonical_version("0.0.1+b"), Some(("0.0.1", Some("+b"))));
assert_eq!(split_canonical_version("1.0.0-rc1"), Some(("1.0.0-rc1", None)));
assert_eq!(split_canonical_version("1.2"), None);