44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
// Copyright 2009 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 gob
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import "fmt"
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// Errors in decoding and encoding are handled using panic and recover.
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// Panics caused by user error (that is, everything except run-time panics
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// such as "index out of bounds" errors) do not leave the file that caused
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// them, but are instead turned into plain error returns. Encoding and
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// decoding functions and methods that do not return an error either use
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// panic to report an error or are guaranteed error-free.
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// A gobError is used to distinguish errors (panics) generated in this package.
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type gobError struct {
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err error
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}
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// errorf is like error_ but takes Printf-style arguments to construct an error.
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// It always prefixes the message with "gob: ".
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func errorf(format string, args ...interface{}) {
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error_(fmt.Errorf("gob: "+format, args...))
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}
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// error wraps the argument error and uses it as the argument to panic.
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func error_(err error) {
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panic(gobError{err})
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}
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// catchError is meant to be used as a deferred function to turn a panic(gobError) into a
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// plain error. It overwrites the error return of the function that deferred its call.
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func catchError(err *error) {
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if e := recover(); e != nil {
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ge, ok := e.(gobError)
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if !ok {
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panic(e)
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}
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*err = ge.err
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}
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return
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}
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