Class: Dryml::ScopedVariables

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

Instance Method Summary collapse

Constructor Details

#initialize(variables = nil) ⇒ ScopedVariables

Returns a new instance of ScopedVariables.



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# File 'lib/dryml/scoped_variables.rb', line 5

def initialize(variables=nil)
  @scopes = variables ? [variables] : []
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object 



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# File 'lib/dryml/scoped_variables.rb', line 32

def method_missing(name, *args)
  if name.to_s =~ /=$/
    self[name.to_s[0..-2].to_sym] = args.first
  else
    self[name]
  end
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/dryml/scoped_variables.rb', line 9

def [](key)
 s = scope_with_key(key) and s[key]
end

#[]=(key, val) ⇒ Object 



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# File 'lib/dryml/scoped_variables.rb', line 13

def []=(key, val)
  s = scope_with_key(key) or raise ArgumentError, "no such scoped variable: #{key}"
  s[key] = val
end

#new_scope(variables) ⇒ Object 



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# File 'lib/dryml/scoped_variables.rb', line 18

def new_scope(variables)
  @scopes << variables.dup
  res = yield
  @scopes.pop
  res
end

#scope_with_key(key) ⇒ Object 



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# File 'lib/dryml/scoped_variables.rb', line 25

def scope_with_key(key)
  @scopes.reverse_each do |s|
    return s if s.has_key?(key)
  end
  nil
end