printer

package
v1.23.2 Latest Latest
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Published: Jun 21, 2026 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Overview

Package printer implements printing of AST nodes.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Fprint

func Fprint(output io.Writer, fset *token.FileSet, node any) error

Fprint "pretty-prints" an AST node to output. It calls Config.Fprint with default settings.

Types

type CommentedNode

type CommentedNode struct {
	Node     any
	Comments []*ast.CommentGroup
}

A CommentedNode bundles an AST node and corresponding comments. It may be provided as argument to any of the Fprint functions.

type CommentedNodes

type CommentedNodes struct {
	Node           any
	CommentedStmts map[js.Stmt]*ast.CommentGroup
}

by XGo

type Config

type Config struct {
	Mode     Mode // default: 0
	Tabwidth int  // default: 8
	Indent   int  // default: 0 (all code is indented at least by this much)
}

A Config node controls the output of Fprint.

func (*Config) Fprint

func (cfg *Config) Fprint(output io.Writer, fset *token.FileSet, node any) error

Fprint "pretty-prints" an AST node to output for a given configuration cfg. Position information is interpreted relative to the file set fset.

type Mode

type Mode uint

A Mode value is a set of flags (or 0). They control printing.

const (
	RawFormat Mode = 1 << iota // do not use a tabwriter; if set, UseSpaces is ignored
	TabIndent                  // use tabs for indentation independent of UseSpaces
	UseSpaces                  // use spaces instead of tabs for alignment
	SourcePos                  // emit //line directives to preserve original source positions
)

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