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Borealis provides a Read-Eval-Print-Loop functionality.

The REPL can be accessed by running borealis with the interactive flag (-i or --interactive), or by calling the standard function debug.

The evaluator will assign the result of the most recently evaluated expression to the special variable _ (underscore) when running the REPL with the interactive flag.

Commands

The following commands are supported by the REPL:

  • .clear - Clear the terminal.
  • .exit - Exit the REPL.
  • .help - Show help.
  • .save - Save the REPL history to a file (.save ./file.txt), if no filename is given the default file will be ./repl.bor.

Examples

Running with the borealis -i command:

> any foo = 12;
> printLine(_);
12
> .exit
> any bar;
> bar = &foo;
> .save ./awesome_file.bor
> .exit

Running in source code file:

printLine('hello world');
debug(); # Run REPL here