You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: serial.go
    path of file: ./repos/gdlv/vendor/go.starlark.net/internal/compile
    
    the code of the file until where you have to start completion: package compile

// This file defines functions to read and write a compile.Program to a file.
//
// It is the client's responsi
    
func (d *decoder) string() (s string) {
	if slice := d.bytes(); len(slice) > 0 {
		// Avoid a memory allocation for each string
		// by unsafely aliasing slice.
		type string struct {
			data *byte
			len  int
		}
		ptr := (*string)(unsafe.Pointer(&s))
		ptr.data = &slice[0]
		ptr.len = len(slice)
	}
	return s
}