class_docstr: For DCPU-16 Assembly.
  
  .. versionadded:: 2.4
code: def guess_identifier(lexer, match):
      ident = match.group(0)
      klass = (
          Name.Variable
          if ident.upper() in lexer.REGISTERS
          else Name.Label
      )
      yield match.start(), klass, ident
  
imports: import re
  from pygments.lexer import RegexLexer, include, bygroups, using, words, DelegatingLexer, default
  from pygments.lexers.c_cpp import CppLexer, CLexer
  from pygments.lexers.d import DLexer
  from pygments.token import Text, Name, Number, String, Comment, Punctuation, Other, Keyword, Operator, Whitespace
label_desc: Use image node_id 1 for calling the Dasm16Lexer obj's underlying member method code with example usage: obj.guess_identifier(lexer, match) without return types