Counts objects for each T_IMEMO type.
This method is only for MRI developers interested in performance and memory usage of Ruby programs.
It returns a hash as:
{:imemo_ifunc=>8,
:imemo_svar=>7,
:imemo_cref=>509,
:imemo_memo=>1,
:imemo_throw_data=>1}
If the optional argument, result_hash, is given, it is overwritten and returned. This is intended to avoid probe effect.
The contents of the returned hash is implementation specific and may change in the future.
In this version, keys are symbol objects.
This method is only expected to work with C Ruby.
Return internal class of obj.
obj can be an instance of InternalObjectWrapper.
Note that you should not use this method in your application.
obj can be an instance of InternalObjectWrapper.
Note that you should not use this method in your application.
Verify internal consistency.
This method is implementation specific. Now this method checks generational consistency if RGenGC is supported.
Returns the size of memory allocated by malloc().
Only available if ruby was built with CALC_EXACT_MALLOC_SIZE.
Returns information about the most recent garbage collection.
If the optional argument, hash, is given, it is overwritten and returned. This is intended to avoid probe effect.
Verify compaction reference consistency.
This method is implementation specific. During compaction, objects that were moved are replaced with T_MOVED objects. No object should have a reference to a T_MOVED object after compaction.
This function expands the heap to ensure room to move all objects, compacts the heap to make sure everything moves, updates all references, then performs a full GC. If any object contains a reference to a T_MOVED object, that object should be pushed on the mark stack, and will make a SEGV.
Returns a list of paths matching glob from the latest gems that can be used by a gem to pick up features from other gems. For example:
Gem.find_latest_files('rdoc/discover').each do |path| load path end
if check_load_path is true (the default), then find_latest_files also searches $LOAD_PATH for files as well as gems.
Unlike find_files, find_latest_files will return only files from the latest version of a gem.
The file name and line number of the caller of the caller of this method.
depth is how many layers up the call stack it should go.
e.g.,
def a; Gem.location_of_caller; end a #=> [“x.rb”, 2] # (it’ll vary depending on file name and line number)
def b; c; end def c; Gem.location_of_caller(2); end b #=> [“x.rb”, 6] # (it’ll vary depending on file name and line number)
Returns the latest release-version specification for the gem name.
Returns the latest release version of RubyGems.
Returns the version of the latest release-version of gem name
Returns the value of Gem.source_date_epoch_string, as a Time object.
This is used throughout RubyGems for enabling reproducible builds.
Path to specification files of default gems.
Deduce Ruby’s –program-prefix and –program-suffix from its install name
Default options for gem commands for Ruby packagers.
The options here should be structured as an array of string “gem” command names as keys and a string of the default options as values.
Example:
def self.operating_system_defaults
{
'install' => '--no-rdoc --no-ri --env-shebang',
'update' => '--no-rdoc --no-ri --env-shebang'
}
end
Shortcut for defining multiple delegator methods, but with no provision for using a different name. The following two code samples have the same effect:
def_delegators :@records, :size, :<<, :map def_delegator :@records, :size def_delegator :@records, :<< def_delegator :@records, :map
Define method as delegator instance method with an optional alias name ali. Method calls to ali will be delegated to accessor.method. accessor should be a method name, instance variable name, or constant name. Use the full path to the constant if providing the constant name. Returns the name of the method defined.
class MyQueue CONST = 1 extend Forwardable attr_reader :queue def initialize @queue = [] end def_delegator :@queue, :push, :mypush def_delegator 'MyQueue::CONST', :to_i end q = MyQueue.new q.mypush 42 q.queue #=> [42] q.push 23 #=> NoMethodError q.to_i #=> 1
Shortcut for defining multiple delegator methods, but with no provision for using a different name. The following two code samples have the same effect:
def_delegators :@records, :size, :<<, :map def_delegator :@records, :size def_delegator :@records, :<< def_delegator :@records, :map
Defines a method method which delegates to accessor (i.e. it calls the method of the same name in accessor). If new_name is provided, it is used as the name for the delegate method. Returns the name of the method defined.
Returns whether or not the struct of type type contains member. If it does not, or the struct type can’t be found, then false is returned. You may optionally specify additional headers in which to look for the struct (in addition to the common header files).
If found, a macro is passed as a preprocessor constant to the compiler using the type name and the member name, in uppercase, prepended with HAVE_.
For example, if have_struct_member('struct foo', 'bar') returned true, then the HAVE_STRUCT_FOO_BAR preprocessor macro would be passed to the compiler.
HAVE_ST_BAR is also defined for backward compatibility.
Mirror the Prism.parse_lex_file API by using the serialization API.
Mirror the Prism.parse_file_success? API by using the serialization API.
Mirror the Prism.parse_file_failure? API by using the serialization API.
SyntaxSuggest.use_prism_parser? [Private]
Tells us if the prism parser is available for use or if we should fallback to ‘Ripper`