class Racc::SymbolTable

# File lib/racc/grammar.rb, line 873
def initialize
  @symbols = []   # :: [Racc::Sym]
  @cache   = {}   # :: {(String|Symbol) => Racc::Sym}
  @dummy  = intern(:$start, true)
  @anchor = intern(false, true)     # Symbol ID = 0
  @error  = intern(:error, false)   # Symbol ID = 1
end

# File lib/racc/grammar.rb, line 885
def [](id)
  @symbols[id]
end

# File lib/racc/grammar.rb, line 901
def delete(sym)
  @symbols.delete sym
  @cache.delete sym.value
end

# File lib/racc/grammar.rb, line 912
def each(&block)
  @symbols.each(&block)
end

# File lib/racc/grammar.rb, line 928
def each_nonterminal(&block)
  @nterms.each(&block)
end

# File lib/racc/grammar.rb, line 920
def each_terminal(&block)
  @terms.each(&block)
end

# File lib/racc/grammar.rb, line 932
def fix
  terms, nterms = @symbols.partition {|s| s.terminal? }
  @symbols = terms + nterms
  @terms = terms
  @nterms = nterms
  @nt_base = terms.size
  fix_ident
  check_terminals
end

# File lib/racc/grammar.rb, line 889
def intern(val, dummy = false)
  @cache[val] ||=
      begin
        sym = Sym.new(val, dummy)
        @symbols.push sym
        sym
      end
end

# File lib/racc/grammar.rb, line 924
def nonterminals
  @symbols[@nt_base, @symbols.size - @nt_base]
end

# File lib/racc/grammar.rb, line 908
def nt_max
  @symbols.size
end

# File lib/racc/grammar.rb, line 916
def terminals(&block)
  @symbols[0, @nt_base]
end