Method: Kernel#raise

Defined in:

eval.c

#raise ⇒ Object #raise(string, cause: $!) ⇒ Object #raise(exception[, string [, array]], cause: $!) ⇒ Object #fail ⇒ Object #fail(string, cause: $!) ⇒ Object #fail(exception[, string [, array]], cause: $!) ⇒ Object

With no arguments, raises the exception in $! or raises a RuntimeError if $! is nil. With a single String argument, raises a RuntimeError with the string as a message. Otherwise, the first parameter should be an Exception class (or another object that returns an Exception object when sent an exception message). The optional second parameter sets the message associated with the exception (accessible via Exception#message), and the third parameter is an array of callback information (accessible via Exception#backtrace). The cause of the generated exception (accessible via Exception#cause) is automatically set to the “current” exception ($!), if any. An alternative value, either an Exception object or nil, can be specified via the :cause argument.

Exceptions are caught by the rescue clause of begin...end blocks.

raise "Failed to create socket"
raise ArgumentError, "No parameters", caller

# File 'eval.c', line 821

static VALUE
f_raise(int c, VALUE *v, VALUE _)
{
    return rb_f_raise(c, v);
}