go example_test 源码
golang example_test 代码
文件路径：/src/go/format/example_test.go
// 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
}
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