| bufio | Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O. |
| bytes | Package bytes implements functions for the manipulation of byte slices. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/exp/trace | Package trace provides a mechanism to collect and retrive the most recent execution data without keeping the complete execution tracing history. |
| golang.org/x/exp/trace/internal/raw | Package raw provides an interface to interpret and emit Go execution traces. |
| golang.org/x/exp/trace/internal/version | |
| golang.org/x/tools/txtar | Package txtar implements a trivial text-based file archive format. |
| io | Package io provides basic interfaces to I/O primitives. |
| regexp | Package regexp implements regular expression search. |
| slices | Package slices defines various functions useful with slices of any type. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |