A class to manage a state to know whether the current token is for Symbol or not.
Return true if the token is a part of Symbol.
# File irb/color.rb, line 209 def scan_token(token) prev_state = @stack.last case token when :on_symbeg, :on_symbols_beg, :on_qsymbols_beg @stack << true when :on_ident, :on_op, :on_const, :on_ivar, :on_cvar, :on_gvar, :on_kw if @stack.last # Pop only when it's Symbol @stack.pop return prev_state end when :on_tstring_beg @stack << false when :on_embexpr_beg @stack << false return prev_state when :on_tstring_end # :on_tstring_end may close Symbol @stack.pop return prev_state when :on_embexpr_end @stack.pop end @stack.last end