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12 Commands

12.1 @   Execute the following expression as M code.
12.2 !   Run an external program or command.
12.3 !!   Launch a subshell from FreeM direct mode.
12.4 ABLOCK   Increment the block counter for one or more event classes.
12.5 ASTART   Enable asynchronous event handling for one or more event classes.
12.6 ASTOP   Disable asynchronous event handling for one or more event classes.
12.7 AUNBLOCK   Decrement the block counter for one or more event classes.
12.8 BREAK   Interrupt a running routine to allow interactive debugging.
12.9 CLOSE   Close an input/output device.
12.10 DO   Transfer program control to one or more subroutines or introduces a new execution level.
12.11 ELSE   Execute the remainder of a line if $TEST evaluates false.
12.12 FOR   Repeat execution of a line or block of code.
12.13 GOTO   Unconditionally transfer program execution to a supplied entryref.
12.14 HALT   Terminate the current FreeM interpreter instance.
12.15 HANG   Temporarily suspend the running program.
12.16 IF   Execute the remainder of a line if a conditional expression evaluates true.
12.17 JOB   Execute an entryref in a child process.
12.18 KILL   Remove data from a local, global, or structured system variable.
12.19 KSUBSCRIPTS   Kill only the descendant subscripts of a local, global, global, or structured system variable.
12.20 KVALUE   Kill only the value of a local, global, or structured system variable.
12.21 LOCK   Control advisory locking for concurrency control.
12.22 MERGE   Merge contents of one local, global, or structured system variable into another.
12.23 NEW   Introduce a new scope for a specified local variable or intrinsic special variable or instantiate an object.
12.24 OPEN   Open a sequential or socket input/output device.
12.25 QUIT   End execution of the current process level, optionally with return value.
12.26 READ   Read input from an input/output device.
12.27 SET   Set the value of a local variable, global, intrinsic special variable, or structured system variable.
12.28 TCOMMIT   Commit a transaction.
12.29 THEN   Preserve $TEST until the end of the current line.
12.30 TROLLBACK   Roll back all pending transactions.
12.31 TSTART   Introduce a new transaction processing level.
12.32 USE   Set the currently-active input/output device.
12.33 VIEW   Modify FreeM internal parameters.
12.34 WRITE   Write output to current input/output device.
12.35 XECUTE   Interpret string as M code.
12.36 ZASSERT   Raise error when a conditional expression evaluates false.
12.37 ZBREAK   Enable/disable ZBREAK mode.
12.38 ZCONST   Define a constant that cannot be altered after initial definition.
12.39 ZGOTO   GOTO with BREAK control.
12.40 ZHALT   Exit FreeM job with return value.
12.41 ZINSERT   Insert code into routine buffer.
12.42 ZJOB   Invoke job, ignoring any timeouts.
12.43 ZLOAD   Load routine into routine buffer.
12.44 ZMAP   Map a global name to a non-default namespace.
12.45 ZNEW   Unknown.
12.46 ZPRINT   Print contents of routine buffer.
12.47 ZQUIT   Quit multiple stack levels at once.
12.48 ZREMOVE   Remove code from routine buffer.
12.49 ZSAVE   Save routine buffer to disk.
12.50 ZTHROW   Programmatically raise an error condition.
12.51 ZTRAP   Raise a FreeM error.
12.52 ZUNMAP   Remove a mapping of a global to a non-default namespace.
12.53 ZWATCH   Enable or disable watchpoints, or set or clear watchpoints on specified globals, locals, or structured system variables.
12.54 ZWITH   Set prefix for future variable references.
12.55 ZWRITE   Write local variable, global, or structured system variable to $IO.
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