+ uint32_t lex_hex (int min, int max);
+ uint32_t lex_escape (int is_byte);
+ int lex_operator (YYSTYPE *lvalp);
+ void push_back (char c);
+
+ void update_innermost_block (struct block_symbol sym);
+ struct block_symbol lookup_symbol (const char *name,
+ const struct block *block,
+ const domain_enum domain);