Bang prefixing to reverse default actions
Some builtins support a bang prefix,
!, which provides a shorthand negative action to default behavior. For example,
set defines a variable where as
!set will undefine a variable.
Sometimes the shortcut will be logical, like a not operator, as is the case with
and where typically each result has to equal true normally or false if used in
!and. Sometimes the shortcut will be more philosophical, such as with
config where normal operations is to query or set configuration but
!config resets the configuration to defaults (thus operating the same as
Please read the respecting commands doc for details on whether it supports a bang prefix and what the behavior of that prefix is.
!(not): Reads the STDIN and exit number from previous process and not's it's condition
falsedepending on whether multiple conditions are met
config: Query or define murex runtime settings
falsedepending on whether one code-block out of multiple ones supplied is successful or unsuccessful.
set: Define a local variable and set it's value
This site's content is rebuilt automatically from murex's source code after each merge to the
master branch. Downloadable murex binaries are also built with the website.
Last built on Thu May 26 22:49:43 UTC 2022 against commit 59e27bb59e27bb1013043fc4a940cf9a2767c63f31dad2c.
Current version is 2.8.2100 which has been verified against 15889 tests cases.