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Raised by Gem::Validator when something is not right in a gem.

Raised to indicate that a system exit should occur with the specified exit_code

Top level class for building the gem repository index.

A RequestSet groups a request to activate a set of dependencies.

nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6'
pg = Gem::Dependency.new 'pg', '~> 0.14'

set = Gem::RequestSet.new nokogiri, pg

requests = set.resolve

p requests.map { |r| r.full_name }
#=> ["nokogiri-1.6.0", "mini_portile-0.5.1", "pg-0.17.0"]

S3URISigner implements AWS SigV4 for S3 Source to avoid a dependency on the aws-sdk-* gems More on AWS SigV4: docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html

The SourceList represents the sources rubygems has been configured to use. A source may be created from an array of sources:

Gem::SourceList.from %w[https://rubygems.example https://internal.example]

Or by adding them:

sources = Gem::SourceList.new
sources << 'https://rubygems.example'

The most common way to get a SourceList is Gem.sources.

Gem::StubSpecification reads the stub: line from the gemspec. This prevents us having to eval the entire gemspec in order to find out certain information.

The Uri handles rubygems source URIs.

The UriFormatter handles URIs from user-input and escaping.

uf = Gem::UriFormatter.new 'example.com'

p uf.normalize #=> 'http://example.com'

Not a URI component.

URI is valid, bad usage is not.

Base class for all URI classes. Implements generic URI syntax as per RFC 2396.

YAML::Store provides the same functionality as PStore, except it uses YAML to dump objects instead of Marshal.

Example

require 'yaml/store'

Person = Struct.new :first_name, :last_name

people = [Person.new("Bob", "Smith"), Person.new("Mary", "Johnson")]

store = YAML::Store.new "test.store"

store.transaction do
  store["people"] = people
  store["greeting"] = { "hello" => "world" }
end

After running the above code, the contents of “test.store” will be:

---
people:
- !ruby/struct:Person
  first_name: Bob
  last_name: Smith
- !ruby/struct:Person
  first_name: Mary
  last_name: Johnson
greeting:
  hello: world

Raised when a mathematical function is evaluated outside of its domain of definition.

For example, since cos returns values in the range -1..1, its inverse function acos is only defined on that interval:

Math.acos(42)

produces:

Math::DomainError: Numerical argument is out of domain - "acos"

Process::Status encapsulates the information on the status of a running or terminated system process. The built-in variable $? is either nil or a Process::Status object.

fork { exit 99 }   #=> 26557
Process.wait       #=> 26557
$?.class           #=> Process::Status
$?.to_i            #=> 25344
$? >> 8            #=> 99
$?.stopped?        #=> false
$?.exited?         #=> true
$?.exitstatus      #=> 99

Posix systems record information on processes using a 16-bit integer. The lower bits record the process status (stopped, exited, signaled) and the upper bits possibly contain additional information (for example the program’s return code in the case of exited processes). Pre Ruby 1.8, these bits were exposed directly to the Ruby program. Ruby now encapsulates these in a Process::Status object. To maximize compatibility, however, these objects retain a bit-oriented interface. In the descriptions that follow, when we talk about the integer value of stat, we’re referring to this 16 bit value.

ConditionVariable objects augment class Mutex. Using condition variables, it is possible to suspend while in the middle of a critical section until a resource becomes available.

Example:

mutex = Thread::Mutex.new
resource = Thread::ConditionVariable.new

a = Thread.new {
   mutex.synchronize {
     # Thread 'a' now needs the resource
     resource.wait(mutex)
     # 'a' can now have the resource
   }
}

b = Thread.new {
   mutex.synchronize {
     # Thread 'b' has finished using the resource
     resource.signal
   }
}

Raised by Encoding and String methods when a transcoding operation fails.

Raised by Encoding and String methods when the string being transcoded contains a byte invalid for the either the source or target encoding.

An internal representation of the backtrace. The user will never interact with objects of this class directly, but class methods can be used to get backtrace settings of the current session.

File::Constants provides file-related constants. All possible file constants are listed in the documentation but they may not all be present on your platform.

If the underlying platform doesn’t define a constant the corresponding Ruby constant is not defined.

Your platform documentations (e.g. man open(2)) may describe more detailed information.

Adds Windows type aliases to the including class for use with Fiddle::Importer.

The aliases added are:

• ATOM

• BOOL

• BYTE

• DWORD

• DWORD32

• DWORD64

• HANDLE

• HDC

• HINSTANCE

• HWND

• LPCSTR

• LPSTR

• PBYTE

• PDWORD

• PHANDLE

• PVOID

• PWORD

• UCHAR

• UINT

• ULONG

• WORD

exception to wait for reading. see IO.select.