Class: SexpProcessor::Environment

Inherits:
Object
  • Object
show all
Defined in:
lib/sexp_processor.rb

Overview

I really hate this here, but I hate subdirs in my lib dir more… I guess it is kinda like shaving… I’ll split this out when it itches too much…

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/sexp_processor.rb', line 351

def initialize
  @env = []
  @env.unshift({})
end

Instance Method Details

#[](name) ⇒ Object

TODO: depth_of



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# File 'lib/sexp_processor.rb', line 366

def [] name
  hash = @env.find { |closure| closure.has_key? name }
  hash[name] if hash
end

#[]=(name, val) ⇒ Object 



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# File 'lib/sexp_processor.rb', line 371

def []= name, val
  hash = @env.find { |closure| closure.has_key? name } || current
  hash[name] = val
end

#all ⇒ Object 



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# File 'lib/sexp_processor.rb', line 356

def all
  @env.reverse.inject { |env, scope| env.merge scope }
end

#current ⇒ Object 



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# File 'lib/sexp_processor.rb', line 376

def current
  @env.first
end

#depth ⇒ Object 



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# File 'lib/sexp_processor.rb', line 360

def depth
  @env.length
end

#scope ⇒ Object 



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# File 'lib/sexp_processor.rb', line 380

def scope
  @env.unshift({})
  begin
    yield
  ensure
    @env.shift
    raise "You went too far unextending env" if @env.empty?
  end
end