// Copyright 2018 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package format_test import ( "bytes" "fmt" "go/format" "go/parser" "go/token" "log" ) func ExampleNode() { const expr = "(6+2*3)/4" // parser.ParseExpr parses the argument and returns the // corresponding ast.Node. node, err := parser.ParseExpr(expr) if err != nil { log.Fatal(err) } // Create a FileSet for node. Since the node does not come // from a real source file, fset will be empty. fset := token.NewFileSet() var buf bytes.Buffer err = format.Node(&buf, fset, node) if err != nil { log.Fatal(err) } fmt.Println(buf.String()) // Output: (6 + 2*3) / 4 }