go/src/go/format/format.go

const tabWidth …

const printerMode …

const printerNormalizeNumbers …

var config …

const parserMode …

// Node formats node in canonical gofmt style and writes the result to dst.
//
// The node type must be *[ast.File], *[printer.CommentedNode], [][ast.Decl],
// [][ast.Stmt], or assignment-compatible to [ast.Expr], [ast.Decl], [ast.Spec],
// or [ast.Stmt]. Node does not modify node. Imports are not sorted for
// nodes representing partial source files (for instance, if the node is
// not an *[ast.File] or a *[printer.CommentedNode] not wrapping an *[ast.File]).
//
// The function may return early (before the entire result is written)
// and return a formatting error, for instance due to an incorrect AST.
func Node(dst io.Writer, fset *token.FileSet, node any) error { … }

// Source formats src in canonical gofmt style and returns the result
// or an (I/O or syntax) error. src is expected to be a syntactically
// correct Go source file, or a list of Go declarations or statements.
//
// If src is a partial source file, the leading and trailing space of src
// is applied to the result (such that it has the same leading and trailing
// space as src), and the result is indented by the same amount as the first
// line of src containing code. Imports are not sorted for partial source files.
func Source(src []byte) ([]byte, error) { … }

func hasUnsortedImports(file *ast.File) bool { … }