Restrict pattern for prerelease component to match SemVer 2.0.0.

The specification §9 says, in part: “[…] Numeric identifiers MUST NOT include leading zeroes. […]”.
2016-10-19 00:35:21 +11:00 · 2016-10-19 00:35:21 +11:00 · 69e9125cfe
commit 69e9125cfe
parent 5746d91dfb
1 changed files with 2 additions and 2 deletions
--- a/semver.py
+++ b/semver.py
@ -16,8 +16,8 @@ _REGEX = re.compile(
        \.
        (?P<patch>(?:0|[1-9][0-9]*))
        (\-(?P<prerelease>
-            [0-9A-Za-z-]+
-            (\.[0-9A-Za-z-]+)*
+            [1-9A-Za-z-][0-9A-Za-z-]*
+            (\.[1-9A-Za-z-][0-9A-Za-z-]*)*
        ))?
        (\+(?P<build>
            [0-9A-Za-z-]+