Class: O

Inherits:
Object
  • Object
show all
Includes:
HashMethodFix, Semantics
Defined in:
lib/o.rb,
lib/o/parser.rb,
lib/o/version.rb,
lib/o/semantics.rb,
lib/o/hash_method_fix.rb

Overview

<#O> is a node, it has _child, _parent and _root attribute.

Rc = O do
  a.b 1
  a.c do
    d 2
  end
end

p Rc
#=> <#O
   :a => <#O
     :b => 1
     :c => <#O
       :d => 2>>>

Rc.a #=> <#O>
Rc.a._child #=> {:b => 1, :c => <#O>}
Rc.a._parent #=> is Rc
Rc.a._root #=> is Rc

Rc._parent #=>  nil
Rc._root #=> is Rc

Defined Under Namespace

Modules: HashMethodFix, Semantics, VERSION Classes: Parser

Constant Summary collapse

Error = 
Class.new Exception
LoadError = 
Class.new Error
BUILTIN_METHODS = 
[ :p, :raise, :sleep, :rand, :srand, :exit, :require, :at_exit, :autoload, :open]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from HashMethodFix

#_merge, #_merge!

Methods included from Semantics

#no, #yes

Constructor Details

#initialize(default = nil, options = {}, &blk) ⇒ O

Returns a new instance of O.

Parameters:

  • (nil) (Object) —

    default create a new hash with the defalut value



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# File 'lib/o.rb', line 143

def initialize(default=nil, options={}, &blk)
  @_root = options[:_root]
  @_child = Hash.new(default)

  if blk
    method = _blk2method(&blk)
    if blk.arity == 0
      method.call
    else
      method.call self
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &blk) ⇒ Object

everything goes here.

.name? 
.name= value 
.name value 
._name

.c 
.a.b.c



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# File 'lib/o.rb', line 232

def method_missing(name, *args, &blk)
  # path: root
  if name == :_
    return _root

  # relative path: __
  elsif name =~ /^__+$/
    num = name.to_s.count('_') - 1
    node = self
    num.times {
      return unless node
      node = node._parent
    }
    return node

  # .name=
  elsif name =~ /(.*)=$/
    return @_child[$1.to_sym] = args[0]

  # ._name
  elsif name =~ /^_(.*)/
    name = $1.to_sym
    args.map!{|arg| O===arg ? arg._child : arg} 
    return @_child.send(name, *args, &blk)

  # .name?
  elsif name =~ /(.*)\?$/
    return !! @_child[$1.to_sym]

  elsif Proc === @_child[name]
    return @_child[name].call *args

  # a.c  # return data if has :c
  # a.c  # create new <#O> if no :c 
  #
  elsif args.empty?

    # a.b.c 1
    # a.b do
    #   c 2
    # end
    if @_child.has_key?(name)
      o = @_child[name]
      o.instance_eval(&blk) if blk
      return o

    else
      next_o = O.new(nil, {_root: _root})
      next_o._parent = self
      self._child[name] = next_o
      next_o.instance_eval(&blk) if blk
      return next_o
    end

  # .name value
  else
    @_child[name] = args[0]
    return args[0]
  end
end

Instance Attribute Details

#_child ⇒ Object

child node, a hash data



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# File 'lib/o.rb', line 137

def _child
  @_child
end

#_parent ⇒ Object

parent node, a <#O>



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# File 'lib/o.rb', line 134

def _parent
  @_parent
end

#_root ⇒ Object

root node, a <#O>



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# File 'lib/o.rb', line 140

def _root
  @_root
end

Class Method Details

.[](data) ⇒ O

convert Hash, O to O

Parameters:

  • data (O, Hash)

Returns:

  • (O) 


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# File 'lib/o.rb', line 59

def [](data)
  case data
  when O
    data
  when Hash
    o = O.new
    o._child = data
    o
  end
end

.eval(content = nil, &blk) ⇒ O

eval a file/string configuration.

Returns:

  • (O) —

    configuration



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# File 'lib/o.rb', line 49

def eval(content=nil, &blk)
  o = O.new nil
  content ? o.instance_eval(Parser.compile(content)) : o.instance_eval(&blk)

  o._root
end

.get(obj) ⇒ Hash

get Hash data from any object

Parameters:

  • obj (O, Hash)

Returns:

  • (Hash) 


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# File 'lib/o.rb', line 74

def get(obj)
  case obj
  when Hash
    obj
  when O
    obj._child
  end
end

.require(name) ⇒ O

load a configuration file, use $: and support ‘~/.gutenrc’

Examples:

Rc = O.require("~/.gutenrc")

Rc = O.require("/absolute/path/rc.rb")

Rc = O.require("guten/rc") #=> load 'APP/lib/guten/rc.rb'
# first try 'guten/rc.rb', then 'guten/rc'

Parameters:

  • name (String)

Returns:

  • (O)

Raises:



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# File 'lib/o.rb', line 96

def require(name)
  path = nil

  # ~/.gutenrc
  if name =~ /^~/
    file = File.expand_path(name)
    path = file if File.exists?(file)

  # /absolute/path/to/rc
  elsif File.absolute_path(name) == name
    path = name if File.exists?(name)

  # relative/rc
  else
    catch :break do
      $:.each { |p|
        ['.rb', ''].each { |ext|
          file = File.join(p, name+ext)
          if File.exists? file
            path = file
            throw :break
          end
        }
      }
    end
  end

  raise LoadError, "can't find file -- #{name}" unless path

  O.eval File.read(path)
end

Instance Method Details

#+(other) ⇒ Object

Raises:



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# File 'lib/o.rb', line 216

def +(other)
  raise Error, "not support type for + -- #{other.inspect}" unless O === other

  O.new _child, other._child
end

#==(other) ⇒ Object 



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# File 'lib/o.rb', line 192

def ==(other)
  _child == other._child
end

#[](key) ⇒ Object

get data



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# File 'lib/o.rb', line 186

def [](key)
  key = key.respond_to?(:to_sym) ? key.to_sym : key

  @_child[key]
end

#[]=(key, value) ⇒ Object

set data



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# File 'lib/o.rb', line 179

def []=(key, value)
  key = key.respond_to?(:to_sym) ? key.to_sym : key

  @_child[key] = value
end

#_dup ⇒ O

duplicate

Returns:

  • (O) —

    new <#O>



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# File 'lib/o.rb', line 199

def _dup
  o = O.new
  o._child = _child.dup

  o
end

#_replace(obj) ⇒ O

replace with a new data

Parameters:

  • obj (Hash, O)

Returns:

  • (O) —

    self



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# File 'lib/o.rb', line 210

def _replace(obj)
  self._child = O.get(obj)

  self
end

#_temp(&blk) ⇒ Object

a temporarily change



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# File 'lib/o.rb', line 158

def _temp(&blk)
  data = _child.dup
  blk.call
  self._child = data

  self
end

#inspect(indent = " ") ⇒ Object Also known as: to_s

pretty print

<#O 
  :b => 1
  :c => 2
  :d => <#O
    :c => 2>>



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# File 'lib/o.rb', line 300

def inspect(indent="  ")
  o={rst: ""}
  o[:rst] << "<#O\n"
  _child.each { |k,v|
    o[:rst] << "#{indent}#{k.inspect} => "
    o[:rst] << (O === v ? "#{v.inspect(indent+"  ")}\n" : "#{v.inspect}\n")
  }
  o[:rst].rstrip! << ">"

  o[:rst]
end