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Class: Racc::Grammar::PrecedenceDefinitionEnv

Relationships & Source Files
Inherits: Object
Defined in: lib/racc/grammar.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(g) ⇒ PrecedenceDefinitionEnv

[ GitHub ] 

  


# File 'lib/racc/grammar.rb', line 361



def initialize(g)
  @grammar = g
  @prechigh_seen = false
  @preclow_seen = false
  @reverse = false
end


  







Instance Attribute Details



  

    #reverse   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 368



attr_reader :reverse


  







Instance Method Details



  

    #higher  
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 370



def higher
  if @prechigh_seen
    raise CompileError, "prechigh used twice"
  end
  @prechigh_seen = true
end


  








  

    #left(*syms)  
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 387



def left(*syms)
  @grammar.declare_precedence :Left, syms.map {|s| @grammar.intern(s) }
end


  








  

    #lower  
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 377



def lower
  if @preclow_seen
    raise CompileError, "preclow used twice"
  end
  if @prechigh_seen
    @reverse = true
  end
  @preclow_seen = true
end


  








  

    #nonassoc(*syms)  
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 395



def nonassoc(*syms)
  @grammar.declare_precedence :Nonassoc, syms.map {|s| @grammar.intern(s)}
end


  








  

    #right(*syms)  
  

  [ GitHub ]


  

  


# File 'lib/racc/grammar.rb', line 391



def right(*syms)
  @grammar.declare_precedence :Right, syms.map {|s| @grammar.intern(s) }
end