require 'semantic'

version = Semantic::Version.new '1.6.5'
version.major             # => 1
version.minor             # => 6
version.patch             # => 5

newer_version = Semantic::Version.new '1.7.0'
version > newer_version   # => false
newer_version <=> version # => 1

complex_version = Semantic::Version.new '3.7.9-pre.1+revision.15723'
complex_version.pre       # => "pre.1"
complex_version.build     # => "revision.15623"

# semantic supports Pessimistic Operator
version.satisfies? '~> 1.5'    # => true
version.satisfies? '~> 1.6.0'  # => true

# incrementing version numbers
version = Semantic::Version.new('0.1.0')
new_version = version.increment!(:major)    # 1.1.0
new_version = version.increment!(:minor)    # 0.2.0
new_version = version.increment!(:patch)    # 0.1.1

new_version = version.major!                # 1.1.0
new_version = version.minor!                # 0.2.0
new_version = version.patch!                # 0.1.1
# (note: increment! & friends return a copy and leave the original unchanged)

require 'semantic'
require 'semantic/core_ext'

"1.8.7-pre.123".to_version