Class: CastOff::Compiler::Configuration::BindingWrapper

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/cast_off/compile/configuration.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#bug, #dlog, #todo, #vlog

Constructor Details

#initialize(bind) ⇒ BindingWrapper

Returns a new instance of BindingWrapper.



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# File 'lib/cast_off/compile/configuration.rb', line 31

def initialize(bind)
  bug() unless bind.instance_of?(Binding)
  @bind = bind
  nest = eval("Module.nesting", @bind)
  pre = ""
  @nest = nest.reverse.map{|n|
    n = n.to_s
    if n[pre]
      replen = pre.length
      replen += 2 unless pre.empty?
      pre = n
      n.slice(replen, n.length - replen)
    else
      n
    end
  }
  begin
    marshal_load(@nest) # validation
  rescue NameError => e
    raise(UnsupportedError.new(<<-EOS))

Failed to construct binding from Module.nesting result (#{nest}).
Currently, CastOff doesn't support binding which cannot construct from Module.nesting result.
CastOff constructs binding with the following process.

--- binding construction process ---
o = Object
#{@nest.map{|n| "o = o.const_get(:#{n})" }.join("\n")}

--- error message ---
#{e.message}
    EOS
  rescue => e
    bug("e = #{e}, @nest = #{@nest}, nest = #{nest}")
  end
end

Instance Attribute Details

#bind ⇒ Object (readonly)

Returns the value of attribute bind.



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# File 'lib/cast_off/compile/configuration.rb', line 29

def bind
  @bind
end

#nest ⇒ Object (readonly)

Returns the value of attribute nest.



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# File 'lib/cast_off/compile/configuration.rb', line 29

def nest
  @nest
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/cast_off/compile/configuration.rb', line 110

def ==(other)
  eql?(other)
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cast_off/compile/configuration.rb', line 105

def eql?(other)
  return false unless other.instance_of?(BindingWrapper)
  @nest == other.nest
end

#hash ⇒ Object 



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# File 'lib/cast_off/compile/configuration.rb', line 114

def hash()
  BindingWrapper.hash
end

#marshal_dump ⇒ Object 



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# File 'lib/cast_off/compile/configuration.rb', line 68

def marshal_dump()
  @nest
end

#marshal_load(nest) ⇒ Object 



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# File 'lib/cast_off/compile/configuration.rb', line 72

def marshal_load(nest)
  o = Object
  ary = []
  nest.each do |n|
    n.split("::").each do |__n|
      o = o.const_get(__n)
    end
    ary << [n, o]
  end
  s0 = []
  s1 = []
  ary.each_with_index do |no, idx|
    n, o = no
    case o
    when Class
      decl = "class"
    when Module
      decl = "module"
    else
      bug("obj = #{o}")
    end
    indent = "  " * idx
    s0 << indent + "#{decl} #{n}"
    s1 << indent + "end"
  end
  indent = "  " * ary.size
  eval_str = s0.join("\n") + "\n#{indent}binding\n" + s1.reverse.join("\n")
  bind = eval(eval_str, TOPLEVEL_BINDING)
  bug() unless bind.instance_of?(Binding)
  @bind = bind
  @nest = nest
end