Class: FunWith::Gems::ConstantBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/fun_with/gems/constant_builder.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.build_constant(*args, &block) ⇒ Object 



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# File 'lib/fun_with/gems/constant_builder.rb', line 4

def self.build_constant( *args, &block )
  self.new.build_constant( *args, &block )
end

Instance Method Details

#build_constant(c) ⇒ Object

Expecting that constants will only be passed as strings when the constants hasn't been previously defined.

returns the constant



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# File 'lib/fun_with/gems/constant_builder.rb', line 11

def build_constant( c )
  if c.is_a?( String )
    #create the module
    const = Object
    
    # go down the ::Module stack, creating modules along the way
    full_const_name = ""
    c.split("::").each do |module_name|
      full_const_name << "::" unless full_const_name.fwf_blank?
      full_const_name << module_name
      
      if eval( "defined?(#{full_const_name})")
        const = eval( full_const_name )
      else
        const = const.const_set( module_name, Module.new )
      end
    end
  
    eval( c )
  else
    c
  end
end