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Viewing changes to src/cmd/fix/netudpgroup.go

  • Committer: Package Import Robot
  • Author(s): James Page
  • Date: 2013-08-20 14:06:23 UTC
  • mfrom: (14.1.23 saucy-proposed)
  • Revision ID: package-import@ubuntu.com-20130820140623-b414jfxi3m0qkmrq
Tags: 2:1.1.2-2ubuntu1
https://launchpad.net/bugs/1211749
https://launchpad.net/bugs/1202027
* Merge from Debian unstable (LP: #1211749, #1202027). Remaining changes:
  - 016-armhf-elf-header.patch: Use correct ELF header for armhf binaries.
  - d/control,control.cross: Update Breaks/Replaces for Ubuntu
    versions to ensure smooth upgrades, regenerate control file.

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src/cmd/fix/netudpgroup.go
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// Copyright 2011 The Go Authors.  All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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        "go/ast"
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)
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func init() {
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        register(netudpgroupFix)
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}
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var netudpgroupFix = fix{
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        "netudpgroup",
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        "2011-08-18",
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        netudpgroup,
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        `Adapt 1-argument calls of net.(*UDPConn).JoinGroup, LeaveGroup to use 2-argument form.
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http://codereview.appspot.com/4815074
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`,
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}
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func netudpgroup(f *ast.File) bool {
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        if !imports(f, "net") {
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                return false
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        }
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        fixed := false
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        for _, d := range f.Decls {
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                fd, ok := d.(*ast.FuncDecl)
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                if !ok || fd.Body == nil {
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                        continue
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                }
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                walk(fd.Body, func(n interface{}) {
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                        ce, ok := n.(*ast.CallExpr)
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                        if !ok {
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                                return
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                        }
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                        se, ok := ce.Fun.(*ast.SelectorExpr)
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                        if !ok || len(ce.Args) != 1 {
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                                return
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                        }
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                        switch se.Sel.String() {
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                        case "JoinGroup", "LeaveGroup":
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                                // c.JoinGroup(a) -> c.JoinGroup(nil, a)
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                                // c.LeaveGroup(a) -> c.LeaveGroup(nil, a)
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                                arg := ce.Args[0]
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                                ce.Args = make([]ast.Expr, 2)
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                                ce.Args[0] = ast.NewIdent("nil")
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                                ce.Args[1] = arg
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                                fixed = true
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                        }
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                })
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        }
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        return fixed
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}