зеркало из https://github.com/github/ruby.git
163 строки
4.6 KiB
Plaintext
163 строки
4.6 KiB
Plaintext
= Keywords
|
|
|
|
The following keywords are used by Ruby.
|
|
|
|
__ENCODING__::
|
|
The script encoding of the current file. See Encoding.
|
|
|
|
__LINE__::
|
|
The line number of this keyword in the current file.
|
|
|
|
__FILE__::
|
|
The path to the current file.
|
|
|
|
BEGIN::
|
|
Runs before any other code in the current file. See {miscellaneous
|
|
syntax}[rdoc-ref:syntax/miscellaneous.rdoc]
|
|
|
|
END::
|
|
Runs after any other code in the current file. See {miscellaneous
|
|
syntax}[rdoc-ref:syntax/miscellaneous.rdoc]
|
|
|
|
alias::
|
|
Creates an alias between two methods (and other things). See {modules and
|
|
classes syntax}[rdoc-ref:syntax/modules_and_classes.rdoc]
|
|
|
|
and::
|
|
Short-circuit Boolean and with lower precedence than <code>&&</code>
|
|
|
|
begin::
|
|
Starts an exception handling block. See {exceptions
|
|
syntax}[rdoc-ref:syntax/exceptions.rdoc]
|
|
|
|
break::
|
|
Leaves a block early. See {control expressions
|
|
syntax}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
case::
|
|
Starts a +case+ expression. See {control expressions
|
|
syntax}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
class::
|
|
Creates or opens a class. See {modules and classes
|
|
syntax}[rdoc-ref:syntax/modules_and_classes.rdoc]
|
|
|
|
def::
|
|
Defines a method. See {methods syntax}[rdoc-ref:syntax/methods.rdoc]
|
|
|
|
defined?::
|
|
Returns a string describing its argument. See {miscellaneous
|
|
syntax}[rdoc-ref:syntax/miscellaneous.rdoc]
|
|
|
|
do::
|
|
Starts a block.
|
|
|
|
else::
|
|
The unhandled condition in +case+, +if+ and +unless+ expressions. See
|
|
{control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
elsif::
|
|
An alternate condition for an +if+ expression. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
end::
|
|
The end of a syntax block. Used by classes, modules, methods, exception
|
|
handling and control expressions.
|
|
|
|
ensure::
|
|
Starts a section of code that is always run when an exception is raised.
|
|
See {exception handling}[rdoc-ref:syntax/exceptions.rdoc]
|
|
|
|
false::
|
|
Boolean false. See {literals}[rdoc-ref:syntax/literals.rdoc]
|
|
|
|
for::
|
|
A loop that is similar to using the +each+ method. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
if::
|
|
Used for +if+ and modifier +if+ statements. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
in::
|
|
Used to separate the iterable object and iterator variable in a +for+ loop.
|
|
See {control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
It also serves as a pattern in a +case+ expression.
|
|
See {pattern matching}[rdoc-ref:syntax/pattern_matching.rdoc]
|
|
|
|
module::
|
|
Creates or opens a module. See {modules and classes
|
|
syntax}[rdoc-ref:syntax/modules_and_classes.rdoc]
|
|
|
|
next::
|
|
Skips the rest of the block. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
nil::
|
|
A false value usually indicating "no value" or "unknown". See
|
|
{literals}[rdoc-ref:syntax/literals.rdoc]
|
|
|
|
not::
|
|
Inverts the following boolean expression. Has a lower precedence than
|
|
<code>!</code>
|
|
|
|
or::
|
|
Boolean or with lower precedence than <code>||</code>
|
|
|
|
redo::
|
|
Restarts execution in the current block. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
rescue::
|
|
Starts an exception section of code in a +begin+ block. See {exception
|
|
handling}[rdoc-ref:syntax/exceptions.rdoc]
|
|
|
|
retry::
|
|
Retries an exception block. See {exception
|
|
handling}[rdoc-ref:syntax/exceptions.rdoc]
|
|
|
|
return::
|
|
Exits a method. See {methods}[rdoc-ref:syntax/methods.rdoc].
|
|
If met in top-level scope, immediately stops interpretation of
|
|
the current file.
|
|
|
|
self::
|
|
The object the current method is attached to. See
|
|
{methods}[rdoc-ref:syntax/methods.rdoc]
|
|
|
|
super::
|
|
Calls the current method in a superclass. See
|
|
{methods}[rdoc-ref:syntax/methods.rdoc]
|
|
|
|
then::
|
|
Indicates the end of conditional blocks in control structures. See
|
|
{control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
true::
|
|
Boolean true. See {literals}[rdoc-ref:syntax/literals.rdoc]
|
|
|
|
undef::
|
|
Prevents a class or module from responding to a method call.
|
|
See {modules and classes}[rdoc-ref:syntax/modules_and_classes.rdoc]
|
|
|
|
unless::
|
|
Used for +unless+ and modifier +unless+ statements. See {control
|
|
expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
until::
|
|
Creates a loop that executes until the condition is true. See
|
|
{control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
when::
|
|
A condition in a +case+ expression. See
|
|
{control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
while::
|
|
Creates a loop that executes while the condition is true. See
|
|
{control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
|
|
|
|
yield::
|
|
Starts execution of the block sent to the current method. See
|
|
{methods}[rdoc-ref:syntax/methods.rdoc]
|
|
|