Triggers an error.

Triggers an error when an assertion fails.

Triggers an error with a "not yet implemented" message.

Prints its arguments, formatted for debugging.

Captures errors with a brief error message.

Captures errors with a verbose error message.

Returns a string describing the current file and line number.

Returns a string describing the current call-stack.

Returns #t if all of its arguments are equal to one another.

Returns #t if all of its arguments share the same identity.

Returns #t if its first argument is numerically equal to any other argument.

Returns #t if its first argument is equal to any other argument.

Returns #t if its first argument has the same identity as any other argument.

Returns a shallow copy of its argument.

Returns a deep, recursive copy of its argument.

Freezes a collection so that it can no longer be mutated.

Recursively freezes a tree of collections.

Returns #t if an RData has been freed.

Generates a high-precision timestamp.

Sleeps the current thread for the given number of seconds.

Returns the number of seconds elapsed since the UNIX epoch, as a string.

Runs the garbage collector.

Retrieves information about the garbage collector.

Tunes the garbage collector.