module Contracts::Support

Public Class Methods

contract_id(contract) click to toggle source
# File lib/contracts/support.rb, line 30
def contract_id(contract)
  contract.object_id
end
eigenclass?(target) click to toggle source
# File lib/contracts/support.rb, line 42
def eigenclass?(target)
  module_eigenclass?(target) ||
    target <= eigenclass_of(Object)
end
eigenclass_hierarchy_supported?() click to toggle source
# File lib/contracts/support.rb, line 34
def eigenclass_hierarchy_supported?
  RUBY_PLATFORM != "java" || RUBY_VERSION.to_f >= 2.0
end
eigenclass_of(target) click to toggle source
# File lib/contracts/support.rb, line 38
def eigenclass_of(target)
  class << target; self; end
end
indent_string(string, amount) click to toggle source
# File lib/contracts/support.rb, line 47
def indent_string(string, amount)
  string.gsub(
    /^(?!$)/,
    (string[/^[ \t]/] || " ") * amount,
  )
end
method_name(method) click to toggle source
# File lib/contracts/support.rb, line 17
def method_name(method)
  method.is_a?(Proc) ? "Proc" : method.name
end
method_position(method) click to toggle source
# File lib/contracts/support.rb, line 6
def method_position(method)
  return method.method_position if method.is_a?(MethodReference)

  file, line = method.source_location
  if file.nil? || line.nil?
    ""
  else
    "#{file}:#{line}"
  end
end
unique_id() click to toggle source

Generates unique id, which can be used as a part of identifier

Example:

Contracts::Support.unique_id   # => "i53u6tiw5hbo"
# File lib/contracts/support.rb, line 25
def unique_id
  # Consider using SecureRandom.hex here, and benchmark which one is better
  (Time.now.to_f * 1000).to_i.to_s(36) + rand(1_000_000).to_s(36)
end

Private Class Methods

module_eigenclass?(target) click to toggle source

Module eigenclass can be detected by its ancestor chain containing a Module

# File lib/contracts/support.rb, line 58
def module_eigenclass?(target)
  target < Module
end