| embed | Package embed provides access to files embedded in the running Go program. |
| 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/constant | Package constant implements Values representing untyped Go constants and their corresponding operations. |
| 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/tools/go/analysis | Package analysis defines the interface between a modular static analysis and an analysis driver program. |
| golang.org/x/tools/go/analysis/passes/inspect | Package inspect defines an Analyzer that provides an AST inspector (golang.org/x/tools/go/ast/inspector.Inspector) for the syntax trees of a package. |
| golang.org/x/tools/go/ast/edge | Package edge defines identifiers for each field of an ast.Node struct type that refers to another Node. |
| golang.org/x/tools/go/ast/inspector | Package inspector provides helper functions for traversal over the syntax trees of a package, including node filtering by type, and materialization of the traversal stack. |
| golang.org/x/tools/go/types/typeutil | Package typeutil defines various utilities for types, such as Map, a hash table that maps types.Type to any value. |
| golang.org/x/tools/internal/analysis/analyzerutil | Package analyzerutil provides implementation helpers for analyzers. |
| golang.org/x/tools/internal/astutil | Package astutil provides various AST utility functions for gopls. |
| golang.org/x/tools/internal/fmtstr | Package fmtstr defines a parser for format strings as used by fmt.Printf. |
| golang.org/x/tools/internal/typeparams | Package typeparams contains common utilities for writing tools that interact with generic Go code, as introduced with Go 1.18. |
| golang.org/x/tools/internal/typesinternal | Package typesinternal provides helpful operators for dealing with go/types: |
| golang.org/x/tools/internal/versions | |
| golang.org/x/tools/refactor/satisfy | Package satisfy inspects the type-checked ASTs of Go packages and reports the set of discovered type constraints of the form (lhs, rhs Type) where lhs is a non-trivial interface, rhs satisfies this interface, and this fact is necessary for the package to be well-typed. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| 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. |