| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go/ast | Package ast declares the types used to represent syntax trees for Go packages. |
| go/build | Package build gathers information about Go packages. |
| go/constant | Package constant implements Values representing untyped Go constants and their corresponding operations. |
| go/format | Package format implements standard formatting of Go source. |
| go/parser | Package parser implements a parser for Go source files. |
| go/token | Package token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates). |
| go/types | Package types declares the data types and implements the algorithms for type-checking of Go packages. |
| golang.org/x/text/collate | Package collate contains types for comparing and sorting Unicode strings according to a given collation order. |
| golang.org/x/text/feature/plural | Package plural provides utilities for handling linguistic plurals in text. |
| golang.org/x/text/internal | Package internal contains non-exported functionality that are used by packages in the text repository. |
| golang.org/x/text/internal/catmsg | Package catmsg contains support types for package x/text/message/catalog. |
| golang.org/x/text/internal/format | Package format contains types for defining language-specific formatting of values. |
| golang.org/x/text/internal/gen | Package gen contains common code for the various code generation tools in the text repository. |
| golang.org/x/text/language | Package language implements BCP 47 language tags and related functionality. |
| golang.org/x/text/runes | Package runes provide transforms for UTF-8 encoded text. |
| golang.org/x/tools/go/callgraph | Package callgraph defines the call graph and various algorithms and utilities to operate on it. |
| golang.org/x/tools/go/callgraph/cha | Package cha computes the call graph of a Go program using the Class Hierarchy Analysis (CHA) algorithm. |
| golang.org/x/tools/go/loader | Package loader loads a complete Go program from source code, parsing and type-checking the initial packages plus their transitive closure of dependencies. |
| golang.org/x/tools/go/ssa | Package ssa defines a representation of the elements of Go programs (packages, types, functions, variables and constants) using a static single-assignment (SSA) form intermediate representation (IR) for the bodies of functions. |
| golang.org/x/tools/go/ssa/ssautil | |
| io | Package io provides basic interfaces to I/O primitives. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| regexp | Package regexp implements regular expression search. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| text/template | Package template implements data-driven templates for generating textual output. |
| unicode | Package unicode provides data and functions to test some properties of Unicode code points. |
| unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |