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   lex.1p    ( 1 )

генерировать программы для лексических задач (РАЗРАБОТКА) (generate programs for lexical tasks (DEVELOPMENT))

Стандартный вывод (Stdout)

If the -t option is specified, the text file of C source code
       output of lex shall be written to standard output.

If the -t option is not specified:

* Implementation-defined informational, error, and warning messages concerning the contents of lex source code input shall be written to either the standard output or standard error.

* If the -v option is specified and the -n option is not specified, lex statistics shall also be written to either the standard output or standard error, in an implementation- defined format. These statistics may also be generated if table sizes are specified with a '%' operator in the Definitions section, as long as the -n option is not specified.