Class: Fabulator::Expr::StatementList

Inherits:
Object
  • Object
show all
Defined in:
lib/fabulator/expr/statement_list.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ StatementList

Returns a new instance of StatementList.



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# File 'lib/fabulator/expr/statement_list.rb', line 4

def initialize
  @statements = [ ]
  @ensures = [ ]
  @catches = [ ]
  @context = nil
end

Instance Method Details

#add_catch(s) ⇒ Object 



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# File 'lib/fabulator/expr/statement_list.rb', line 23

def add_catch(s)
  @catches << s
end

#add_ensure(s) ⇒ Object 



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# File 'lib/fabulator/expr/statement_list.rb', line 19

def add_ensure(s)
  @ensures << s
end

#add_statement(s) ⇒ Object 



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# File 'lib/fabulator/expr/statement_list.rb', line 15

def add_statement(s)
  @statements << s if !s.nil?
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fabulator/expr/statement_list.rb', line 31

def empty?
  @statements.empty? && @ensures.empty?
end

#is_noop? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fabulator/expr/statement_list.rb', line 27

def is_noop?
  @statements.empty? && @ensures.empty?
end

#run(context, autovivify = false) ⇒ Object 



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# File 'lib/fabulator/expr/statement_list.rb', line 35

def run(context, autovivify = false)
  if !@context.nil?
    context = @context
  end
  result = [ ]
  begin
    if !@statements.nil?
      (@statements - [nil]).each do |s| 
        result = s.run(context, autovivify)
      end
    end
  rescue Fabulator::StateChangeException => e
    raise e
  rescue => e
    result = []
    caught = false
    ex = nil
    if e.is_a?(Fabulator::Expr::Exception) 
      ex = e.node
    else
      ex = context.root.anon_node(e.to_s, [ FAB_NS, 'string' ])
      ex.set_attribute('class', 'ruby.' + e.class.to_s.gsub(/::/, '.'))
    end
    if !@catches.nil?
      @catches.each do |s|
        if !s.nil? && s.run_test(ex)
          caught = true
          result = s.run(context.with_root(ex), autovivify)
        end
      end
    end

    raise e unless caught
  ensure
    if !@ensures.nil? && !@ensures.empty?
      @ensures.each do |s|
        s.run(context, autovivify) unless s.nil?
      end
    end
  end

  return result
end

#use_context(c) ⇒ Object 



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# File 'lib/fabulator/expr/statement_list.rb', line 11

def use_context(c)
  @context = c
end