errorutil
Errorutil is a small go package to help show syntax errors in for example JSON documents.
It was forked from Camlistore to make a smaller dependency.
Example
An example of how to use the package to show errors when decoding with encoding/json.
if err = decoder.Decode(&objmap); err != nil {
extra := ""
// if it's a syntax error, add more information
if serr, ok := err.(*json.SyntaxError); ok {
if _, serr := fh.Seek(0, os.SEEK_SET); serr != nil {
log.Fatalf("seek error: %v", serr)
}
line, col, highlight := errorutil.HighlightBytePosition(fh, serr.Offset)
extra = fmt.Sprintf(":\nError at line %d, column %d (file offset %d):\n%s",
line, col, serr.Offset, highlight)
}
return nil, fmt.Errorf("error parsing JSON object in config file %s%s\n%v",
fh.Name(), extra, err)
}
License
This package is licesed under the Apache License, version 2.0. It was developed by Brad Fitzpatrick as part of the Camlistore project.
