Module: Main::Cast

Defined in:
lib/main/cast.rb

Constant Summary collapse

List = 
[]

Class Method Summary collapse

Class Method Details

.[](sym) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/main/cast.rb', line 88

def self.[] sym
  prefix = sym.to_s.downcase.to_sym
  candidates = List.select{|m| m =~ %r/^#{ prefix }/i}
  m = candidates.shift
  raise ArgumentError, "unsupported cast: #{ sym.inspect } (#{ List.join ',' })" unless
    m
  raise ArgumentError, "ambiguous cast: #{ sym.inspect } (#{ List.join ',' })" unless
    candidates.empty? or m.to_s == sym.to_s
  this = self
  lambda{|obj| method(m).call obj}
end

.cast(m, &b) ⇒ Object 



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# File 'lib/main/cast.rb', line 10

def self.cast m, &b
  define_method m, &b
  export m
  List << m.to_s
end

.export(m) ⇒ Object 



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# File 'lib/main/cast.rb', line 3

def self.export m
  module_function m
  public m
end