Called when a map starts.
anchor is the anchor associated with the map or nil. tag is the tag associated with the map or nil. implicit is a boolean indicating whether or not the map was implicitly started. style is an integer indicating the mapping style.
See the constants in Psych::Nodes::Mapping for the possible values of style.
Here is a YAML document that exercises most of the possible ways this method can be called:
---
k: !!map { hello: world }
v: &pewpew
hello: world
The above YAML document consists of three maps, an outer map that contains two inner maps. Below is a matrix of the parameters sent in order to represent these three maps:
# anchor tag implicit style [nil, nil, true, 1 ] [nil, "tag:yaml.org,2002:map", false, 2 ] ["pewpew", nil, true, 1 ]
Handles start_document events with version, tag_directives, and implicit styling.
Start a document emission with YAML version, tags, and an implicit start.
Start emitting a YAML map with anchor, tag, an implicit start and end, and style.
This method is called when some event handler is undefined. event is :on_XXX, token is the scanned token, and data is a data accumulator.
The return value of this method is passed to the next event handler (as of Enumerable#inject).
Returns new ancillary data for IP_PKTINFO.
If spec_dst is not given, addr is used.
IP_PKTINFO is not standard.
Supported platform: GNU/Linux
addr = Addrinfo.ip("127.0.0.1") ifindex = 0 spec_dst = Addrinfo.ip("127.0.0.1") p Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dst) #=> #<Socket::AncillaryData: INET IP PKTINFO 127.0.0.1 ifindex:0 spec_dst:127.0.0.1>
Extracts addr, ifindex and spec_dst from IP_PKTINFO ancillary data.
IP_PKTINFO is not standard.
Supported platform: GNU/Linux
addr = Addrinfo.ip("127.0.0.1") ifindex = 0 spec_dest = Addrinfo.ip("127.0.0.1") ancdata = Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dest) p ancdata.ip_pktinfo #=> [#<Addrinfo: 127.0.0.1>, 0, #<Addrinfo: 127.0.0.1>]
Returns new ancillary data for IPV6_PKTINFO.
IPV6_PKTINFO is defined by RFC 3542.
addr = Addrinfo.ip("::1") ifindex = 0 p Socket::AncillaryData.ipv6_pktinfo(addr, ifindex) #=> #<Socket::AncillaryData: INET6 IPV6 PKTINFO ::1 ifindex:0>
Extracts addr and ifindex from IPV6_PKTINFO ancillary data.
IPV6_PKTINFO is defined by RFC 3542.
addr = Addrinfo.ip("::1") ifindex = 0 ancdata = Socket::AncillaryData.ipv6_pktinfo(addr, ifindex) p ancdata.ipv6_pktinfo #=> [#<Addrinfo: ::1>, 0]
Returns the raw error code indicating the cause of the hostname resolution failure.
begin Addrinfo.getaddrinfo("ruby-lang.org", nil) rescue Socket::ResolutionError => e if e.error_code == Socket::EAI_AGAIN puts "Temporary failure in name resolution." end end
Note that error codes depend on the operating system.
Read a REG_SZ or REG_EXPAND_SZ registry value named name.
If the value type is REG_EXPAND_SZ, environment variables are replaced. Unless the value type is REG_SZ or REG_EXPAND_SZ, TypeError is raised.
Same as IO.
See Zlib::GzipReader documentation for a description.
See Zlib::GzipReader documentation for a description.
Write to a buffer a value of type at offset. type should be one of symbols described in get_value.
buffer = IO::Buffer.new(8) # => # #<IO::Buffer 0x0000555f5c9a2d50+8 INTERNAL> # 0x00000000 00 00 00 00 00 00 00 00 buffer.set_value(:U8, 1, 111) # => 1 buffer # => # #<IO::Buffer 0x0000555f5c9a2d50+8 INTERNAL> # 0x00000000 00 6f 00 00 00 00 00 00 .o......
Note that if the type is integer and value is Float, the implicit truncation is performed:
buffer = IO::Buffer.new(8) buffer.set_value(:U32, 0, 2.5) buffer # => # #<IO::Buffer 0x0000555f5c9a2d50+8 INTERNAL> # 0x00000000 00 00 00 02 00 00 00 00 # ^^ the same as if we'd pass just integer 2
Write values of buffer_types at offset to the buffer. buffer_types should be an array of symbols as described in get_value. values should be an array of values to write.
buffer = IO::Buffer.new(8) buffer.set_values([:U8, :U16], 0, [1, 2]) buffer # => # #<IO::Buffer 0x696f717561746978+8 INTERNAL> # 0x00000000 01 00 02 00 00 00 00 00 ........
Efficiently copy from a source String into the buffer, at offset using memmove.
buf = IO::Buffer.new(8) # => # #<IO::Buffer 0x0000557412714a20+8 INTERNAL> # 0x00000000 00 00 00 00 00 00 00 00 ........ # set buffer starting from offset 1, take 2 bytes starting from string's # second buf.set_string('test', 1, 2, 1) # => 2 buf # => # #<IO::Buffer 0x0000557412714a20+8 INTERNAL> # 0x00000000 00 65 73 00 00 00 00 00 .es.....
See also copy for examples of how buffer writing might be used for changing associated strings and files.
Returns serialized iseq binary format data as a String object. A corresponding iseq object is created by RubyVM::InstructionSequence.load_from_binary() method.
String extra_data will be saved with binary data. You can access this data with RubyVM::InstructionSequence.load_from_binary_extra_data(binary).
Note that the translated binary data is not portable. You can not move this binary data to another machine. You can not use the binary data which is created by another version/another architecture of Ruby.
Returns the absolute path of this instruction sequence.
nil if the iseq was evaluated from a string.
For example, using ::compile_file:
# /tmp/method.rb
def hello
puts "hello, world"
end
# in irb
> iseq = RubyVM::InstructionSequence.compile_file('/tmp/method.rb')
> iseq.absolute_path #=> /tmp/method.rb
Returns the base label of this instruction sequence.
For example, using irb:
iseq = RubyVM::InstructionSequence.compile('num = 1 + 2') #=> <RubyVM::InstructionSequence:<compiled>@<compiled>> iseq.base_label #=> "<compiled>"
Using ::compile_file:
# /tmp/method.rb
def hello
puts "hello, world"
end
# in irb
> iseq = RubyVM::InstructionSequence.compile_file('/tmp/method.rb')
> iseq.base_label #=> <main>