Class: RedParse::LoopNode

Inherits:
ValueNode show all
Defined in:
lib/redparse/node.rb

Constant Summary

Constants included from FlattenedIvars

FlattenedIvars::EXCLUDED_IVARS

Instance Attribute Summary

Attributes inherited from Node

#endline, #errors, #offset, #parent, #startline

Attributes included from Stackable::Meta

#boolean_identity_params, #identity_params

Instance Method Summary collapse

Methods inherited from ValueNode

#lvalue

Methods inherited from Node

#+, #+@, #==, [], #[]=, #add_parent_links!, #begin_parsetree, create, #data, #deep_copy, #delete_extraneous_ivars!, #delete_linenums!, #depthwalk, #depthwalk_nodes, #error?, #evalable_inspect, #fixup_multiple_assignments!, #fixup_rescue_assignments!, #initialize_ivars, inline_symbols, #inspect, #lhs_unparse, #linerange, #lvalue, #lvars_defined_in, #merge_replacement_session, namelist, #negate, #original_brackets_assign, param_names, #parsetrees, #pretty_print, #prohibit_fixup, #replace_ivars_and_self, #replace_value, #rescue_parsetree, #to_parsetree, #to_parsetree_and_warnings, #unary, #walk, #xform_tree!

Methods included from Stackable::Meta

#build_exemplars, #enumerate_exemplars, #identity_param

Methods included from FlattenedIvars

#flattened_ivars, #flattened_ivars_equal?

Methods included from Stackable

#identity_name

Constructor Details

#initialize(loopword, condition, thenword, body, endtok) ⇒ LoopNode

Returns a new instance of LoopNode.



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# File 'lib/redparse/node.rb', line 4170

def initialize(loopword,condition,thenword,body,endtok)
  @offset=loopword.offset
  condition.special_conditions! if condition.respond_to? :special_conditions!
  super(condition,body)
  @reverse=  loopword.ident=="until"
  @loopword_offset=loopword.offset
end

Instance Method Details

#image ⇒ Object 



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# File 'lib/redparse/node.rb', line 4180

def image; "(#{loopword})" end

#parsetree(o) ⇒ Object 



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# File 'lib/redparse/node.rb', line 4203

def parsetree(o)
  cond=condition.rescue_parsetree(o)
  if cond.first==:not
    reverse=!@reverse
    cond=cond.last
  else
    reverse=@reverse
  end 
  [reverse ? :until : :while, cond, body&&body.parsetree(o), true]
end

#to_lisp ⇒ Object 



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# File 'lib/redparse/node.rb', line 4198

def to_lisp
  body=body()
  "(#{@reverse ? :until : :while} #{condition.to_lisp}\n#{body.to_lisp})"
end

#unparse(o = default_unparse_options) ⇒ Object 



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# File 'lib/redparse/node.rb', line 4182

def unparse o=default_unparse_options
  [@reverse? "until " : "while ",
   condition.unparse(o), unparse_nl(body||self,o),
   body&&body.unparse(o),
   ";end"
  ].join
end

#until ⇒ Object 



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# File 'lib/redparse/node.rb', line 4194

def until
  @reverse ? condition : negate(condition, @loopword_offset)
end

#while ⇒ Object 



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# File 'lib/redparse/node.rb', line 4190

def while
  @reverse ? negate(condition, @loopword_offset) : condition
end