STDERR Pipe (?) Token

Pipes STDERR from the left hand command to STDIN of the right hand command

Description

This token swaps the STDOUT and STDERR streams of the left hand command.

Please note that this token is only effective when it is prefixed by white space.

Examples

» err Hello, world! ? regexp s/world/Earth/
Hello, Earth!

In following example the first command is writing to STDOUT rather than STDERR so Hello, world! doesn't get pipelined and thus isn't affected by regexp:

» out Hello, world! ? regexp s/world/Earth/
Hello, world!

In following example the STDERR token isn't whitespace padded so is treated like any ordinary printable character:

» err Hello, world!? regexp s/world/Earth/
Hello, world!? regexp s/world/Earth/

See Also

• Arrow Pipe (->) Token: Pipes STDOUT from the left hand command to STDIN of the right hand command
• Generic Pipe (=>) Token: Pipes a reformatted STDOUT stream from the left hand command to STDIN of the right hand command
• POSIX Pipe (|) Token: Pipes STDOUT from the left hand command to STDIN of the right hand command
• Pipeline: Overview of what a "pipeline" is
• <> / read-named-pipe: Reads from a Murex named pipe
• err: Print a line to the STDERR
• out: Print a string to the STDOUT with a trailing new line character
• regexp: Regexp tools for arrays / lists of strings