Racc::LocationPointer

A set of rule and position in it’s RHS. Note that the number of pointers is more than rule’s RHS array, because pointer points right edge of the final symbol when reducing.

Attributes

rule[R]

index[R]

symbol[R]

ident[R]

reduce[R]

Public Class Methods

new(rule, i, sym) click to toggle source

     # File lib/racc/grammar.rb, line 811
811:     def initialize(rule, i, sym)
812:       @rule   = rule
813:       @index  = i
814:       @symbol = sym
815:       @ident  = @rule.hash + i
816:       @reduce = sym.nil?
817:     end

Public Instance Methods

==(ot) click to toggle source

Alias for: eql?

before(len) click to toggle source

     # File lib/racc/grammar.rb, line 853
853:     def before(len)
854:       @rule.ptrs[@index - len] or ptr_bug!
855:     end

eql?(ot) click to toggle source

     # File lib/racc/grammar.rb, line 837
837:     def eql?(ot)
838:       @hash == ot.hash
839:     end

Also aliased as: ==

head?() click to toggle source

     # File lib/racc/grammar.rb, line 843
843:     def head?
844:       @index == 0
845:     end

increment() click to toggle source

Alias for: next

inspect() click to toggle source

Alias for: to_s

next() click to toggle source

     # File lib/racc/grammar.rb, line 847
847:     def next
848:       @rule.ptrs[@index + 1] or ptr_bug!
849:     end

Also aliased as: increment

to_s() click to toggle source

     # File lib/racc/grammar.rb, line 830
830:     def to_s
831:       sprintf('(%d,%d %s)',
832:               @rule.ident, @index, (reduce?() ? '#' : @symbol.to_s))
833:     end

Also aliased as: inspect

Private Instance Methods

ptr_bug!() click to toggle source

     # File lib/racc/grammar.rb, line 859
859:     def ptr_bug!
860:       raise "racc: fatal: pointer not exist: self: #{to_s}"
861:     end

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Racc::LocationPointer

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Private Instance Methods