Help at the command line

rascal-0.41.2

Synopsis

Get help when using Rascal at the command line (CLI, REPL, Rascal Shell)

Description

While using the command line interface you can get help like so:

rascal>:help
Welcome to the Rascal command shell.

Shell commands (optionally terminated with `;`):
:help                      Prints this message
:quit or EOF               Quits the shell
:set <option> <expression> Sets an option
e.g. profiling    true/false
     tracing      true/false
     errors       true/false
     debugging    true/false
:edit <modulename>         Opens an editor for that module
:test <optModuleName>      Runs all unit tests currently loaded, or only of a specific module
:declarations              Prints variables, functions, data and syntax definitions in scope
:undeclare <name>          Remove variable, function, data or syntax from this scope
:unimport  <name>          Remove import from current scope

Example rascal statements and declarations:
1 + 1;                     Expressions simply print their output and (static) type
int a;                     Declarations allocate a name in the current scope
a = 1;                     Assignments store a value in a (optionally previously declared) variable
int a = 1;                 Declaration with initialization
import IO;                 Importing a module makes its public members available
println("Hello World")     Function calling

Please read the manual for further information
ok

To quit the repl use :quit