Module: Kernel
Class Method Summary
-
concern(topic, &module_definition)
mod_func
A shortcut to define a toplevel concern, not within a module.
-
enable_warnings(&block)
mod_func
Sets $VERBOSE to
true
for the duration of the block and back to its original value afterwards. -
silence_warnings(&block)
mod_func
Sets $VERBOSE to
nil
for the duration of the block and back to its original value afterwards. -
suppress(*exception_classes)
mod_func
Blocks and ignores any exception passed as argument if raised within the block.
-
with_warnings(flag)
mod_func
Sets $VERBOSE for the duration of the block and back to its original value afterwards.
Instance Method Summary
-
class_eval(*args, &block)
class_eval on an object acts like
singleton_class.class_eval
.
Class Method Details
concern(topic, &module_definition) (mod_func)
A shortcut to define a toplevel concern, not within a module.
See ::Module::Concerning
for more.
# File 'activesupport/lib/active_support/core_ext/kernel/concern.rb', line 11
def concern(topic, &module_definition) Object.concern topic, &module_definition end
enable_warnings(&block) (mod_func)
Sets $VERBOSE to true
for the duration of the block and back to its original value afterwards.
# File 'activesupport/lib/active_support/core_ext/kernel/reporting.rb', line 20
def enable_warnings(&block) with_warnings(true, &block) end
silence_warnings(&block) (mod_func)
Sets $VERBOSE to nil
for the duration of the block and back to its original value afterwards.
silence_warnings do
value = noisy_call # no warning voiced
end
noisy_call # warning voiced
# File 'activesupport/lib/active_support/core_ext/kernel/reporting.rb', line 14
def silence_warnings(&block) with_warnings(nil, &block) end
suppress(*exception_classes) (mod_func)
Blocks and ignores any exception passed as argument if raised within the block.
suppress(ZeroDivisionError) do
1/0
puts 'This code is NOT reached'
end
puts 'This code gets executed and nothing related to ZeroDivisionError was seen'
# File 'activesupport/lib/active_support/core_ext/kernel/reporting.rb', line 41
def suppress(*exception_classes) yield rescue *exception_classes end
with_warnings(flag) (mod_func)
Sets $VERBOSE for the duration of the block and back to its original value afterwards.
# File 'activesupport/lib/active_support/core_ext/kernel/reporting.rb', line 26
def with_warnings(flag) old_verbose, $VERBOSE = $VERBOSE, flag yield ensure $VERBOSE = old_verbose end
Instance Method Details
class_eval(*args, &block)
class_eval on an object acts like singleton_class.class_eval
.
# File 'activesupport/lib/active_support/core_ext/kernel/singleton_class.rb', line 5
def class_eval(*args, &block) singleton_class.class_eval(*args, &block) end