Carton::Extract
Inherits IO / Reference / Object
Constructors
new(wrapped : IO, extract : IO::Memory, sync_close : Bool = true)
Sourcenew(wrapped : IO, extract : IO::Memory, sync_close : Bool = true, &block : Extract -> )
SourceClass methods
part(wrapped : IO, &block : Extract -> )
Sourcepart(wrapped : IO)
Sourcepart!(wrapped : IO, &block : Extract -> )
Sourcepart!(wrapped : IO) : IO::Memory
SourceInstance methods
closed=(closed : Bool)
Sourceclosed?
Returns true if this IO is closed.
IO defines returns false, but including types may override.
extract
Sourceextract=(extract : IO::Memory)
Sourceextract_eof?
Sourceread(slice : Bytes)
Reads at most slice.size bytes from this IO into slice.
Returns the number of bytes read, which is 0 if and only if there is no
more data to read (so checking for 0 is the way to detect end of file).
io = IO::Memory.new "hello"
slice = Bytes.new(4)
io.read(slice) # => 4
slice # => Bytes[104, 101, 108, 108]
io.read(slice) # => 1
slice # => Bytes[111, 101, 108, 108]
io.read(slice) # => 0sync_close
Sourcesync_close=(sync_close : Bool)
Sourcewrapped
Sourcewrapped=(wrapped : IO)
Sourcewrite(slice : Bytes) : Nil
Writes the contents of slice into this IO.
io = IO::Memory.new
slice = Bytes.new(4) { |i| ('a'.ord + i).to_u8 }
io.write(slice)
io.to_s # => "abcd"