Command -- the class of all commands

Usage:

Command g
Inputs:
- g, a function or a string
Outputs:
- a new command that will evaluate g() if g is a function, and will evaluate run g if g is a string

Description

A command behaves as a function does if it is followed by an adjacent expression that can serve as its argument or argument list. In addition, if it appears as the value of an expression typed by the user at top level (i.e., not in a file), then it gets executed with empty argument list.

i1 : (f = Command ( () -> 2^30 );)

i2 : f

o2 = 1073741824

i3 : (c = Command "date";)

i4 : c
Thu May 15 13:42:08 UTC 2025

o4 = 0

Methods that use a command:

code(Command) -- see code -- display source code
Command Thing
locate(Command) -- see locate -- locate source code
methodOptions(Command) -- see methodOptions(Function) -- recover the options used when a method function was created
methods(Command) -- see methods -- list methods
options(Command) -- see options(Function) -- get the optional arguments and default values of a function or method
Command \ Set -- see VisibleList / Function -- apply a function to elements of a list
Command \ String -- see VisibleList / Function -- apply a function to elements of a list
Command \ VirtualTally -- see VisibleList / Function -- apply a function to elements of a list
Command \ VisibleList -- see VisibleList / Function -- apply a function to elements of a list
List / Command -- see VisibleList / Function -- apply a function to elements of a list
Set / Command -- see VisibleList / Function -- apply a function to elements of a list
String / Command -- see VisibleList / Function -- apply a function to elements of a list
VirtualTally / Command -- see VisibleList / Function -- apply a function to elements of a list
VisibleList / Command -- see VisibleList / Function -- apply a function to elements of a list
Command \\ Thing -- see VisibleList // Function -- apply a function
Thing // Command -- see VisibleList // Function -- apply a function
VisibleList // Command -- see VisibleList // Function -- apply a function

Protected objects of class Command:

clearAll -- forget everything
clearOutput -- forget output values
copyright -- see Copyright and license
edit -- edit source code
exit -- exit the program
help -- view documentation nodes
infoHelp -- view documentation in Info format
listLocalSymbols -- display of local symbols and their values
listUserSymbols -- display the user's symbols
coverageSummary -- see profile -- profile a computation
profileSummary -- see profile -- profile a computation
quit -- quit the program
restart -- restart Macaulay2
showClassStructure -- display class structure
showStructure -- display parent structure
showUserStructure -- show parent structure for those types defined by user
viewHelp -- view online documentation in a web browser

For the programmer

The object Command is a self initializing type, with ancestor classes BasicList < Thing.

The source of this document is in Macaulay2Doc/ov_repl.m2:1139:0.

Command -- the class of all commands

Description

See also

Methods that use a command:

Protected objects of class Command:

For the programmer