class Rubic::Environment

Public Class Methods

new(outer=nil) click to toggle source
# File lib/rubic/environment.rb, line 3
def initialize(outer=nil)
  @outer = outer
  @table = {}
end

Public Instance Methods

[](name)
Alias for: refvar
[]=(name, value)
Alias for: defvar
assign(name, value) click to toggle source
# File lib/rubic/environment.rb, line 22
def assign(name, value)
  if @table.key? name
    @table[name] = value
  elsif @outer
    @outer.assign(name, value)
  else
    raise Rubic::NameError, "undefined variable `#{name}'"
  end
end
bind(params, args) click to toggle source
# File lib/rubic/environment.rb, line 32
def bind(params, args)
  if params.size != args.size
    raise Rubic::ArgumentError, "wrong number of arguments (#{args.size} for #{params.size})"
  end

  params.each.with_index do |name, i|
    @table[name] = args[i]
  end
end
defvar(name, value) click to toggle source
# File lib/rubic/environment.rb, line 8
def defvar(name, value)
  @table[name] = value
end
Also aliased as: []=
extend(klass) click to toggle source
# File lib/rubic/environment.rb, line 42
def extend(klass)
  ext = klass.new
  klass.instance_methods(false).each do |mname|
    defvar(mname, ext.method(mname))
  end
end
refvar(name) click to toggle source
# File lib/rubic/environment.rb, line 12
def refvar(name)
  if @table.key? name
    @table[name]
  elsif @outer
    @outer.refvar(name)
  else
    raise Rubic::NameError, "undefined variable `#{name}'"
  end
end
Also aliased as: []