diff options
Diffstat (limited to 'prog/encoding.go')
| -rw-r--r-- | prog/encoding.go | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/prog/encoding.go b/prog/encoding.go index cd4eef17f..b5d5114ca 100644 --- a/prog/encoding.go +++ b/prog/encoding.go @@ -747,6 +747,7 @@ func (p *parser) parseArgUnion(typ Type, dir Dir) (Arg, error) { var ( optType Type optDir Dir + options []string ) index := -1 for i, field := range t1.Fields { @@ -754,9 +755,11 @@ func (p *parser) parseArgUnion(typ Type, dir Dir) (Arg, error) { optType, index, optDir = field.Type, i, field.Dir(dir) break } + options = append(options, fmt.Sprintf("%q", field.Name)) } if optType == nil { - p.eatExcessive(true, "wrong union option") + p.eatExcessive(true, "wrong option %q of union %q, available options are: %s", + name, typ.Name(), strings.Join(options, ", ")) return typ.DefaultArg(dir), nil } var opt Arg |