}
	mode := stat.Mode()
	if !mode.IsRegular() {
		return ErrPermission
	}
	if (mode & 0111) == 0 {
		return ErrPermission
	}
	return nil
}

// splitPathList splits a path list.
// This is based on genSplit from strings/strings.go
func splitPathList(pathList string) []string {
	if pathList == "" {
		return nil
	}
	n := 1
	for i := 0; i < len(pathList); i++ {
		if pathList[i] == PathListSeparator {
			n++

	if f := ctxt.JoinPath; f != nil {
		return f(elem...)
	}
	return filepath.Join(elem...)
}

// splitPathList calls ctxt.SplitPathList (if not nil) or else filepath.SplitList.
func (ctxt *Context) splitPathList(s string) []string {
	if f := ctxt.SplitPathList; f != nil {
		return f(s)
	}
	return filepath.SplitList(s)
}

// isAbsPath calls ctxt.IsAbsPath (if not nil) or else filepath.IsAbs.

	if f := ctxt.JoinPath; f != nil {
		return f(elem...)
	}
	return filepath.Join(elem...)
}

// splitPathList calls ctxt.SplitPathList (if not nil) or else filepath.SplitList.
func (ctxt *Context) splitPathList(s string) []string {
	if f := ctxt.SplitPathList; f != nil {
		return f(s)
	}
	return filepath.SplitList(s)
}

// isAbsPath calls ctxt.IsAbsPath (if not nil) or else filepath.IsAbs.

		{"Context.IsDir", Field, 0},
		{"Context.JoinPath", Field, 0},
		{"Context.OpenFile", Field, 0},
		{"Context.ReadDir", Field, 0},
		{"Context.ReleaseTags", Field, 1},
		{"Context.SplitPathList", Field, 0},
		{"Context.ToolTags", Field, 17},
		{"Context.UseAllFiles", Field, 0},
		{"Default", Var, 0},
		{"Directive", Type, 21},
		{"Directive.Pos", Field, 21},
		{"Directive.Text", Field, 21},

pkg go/build, type Context struct, OpenFile func(string) (io.ReadCloser, error)
pkg go/build, type Context struct, ReadDir func(string) ([]os.FileInfo, error)
pkg go/build, type Context struct, SplitPathList func(string) []string
pkg go/build, type Context struct, UseAllFiles bool
pkg go/build, type ImportMode uint
pkg go/build, type NoGoError struct
pkg go/build, type NoGoError struct, Dir string