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stringer: Add logic to fail if transformer empties value 

If the output of the transformer is '' means that something went wrong (if it had a value before) and so
it needs to fail to not conntinue with silence errors
This commit is contained in:
xescugc 2020-06-08 21:31:25 +02:00
parent 20d9792920
commit cb6196db58
1 changed files with 11 additions and 2 deletions
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13
stringer.go
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@ -377,8 +377,17 @@ func (g *Generator) transformValueNames(values []Value, transformMethod string)
return
}
for i := range values {
values[i].name = fn(values[i].name)
for i, v := range values {
after := fn(v.name)
// If the original one was "" or the one before the transformation
// was "" (most commonly if linecomment defines it as empty) we
// do not care if it's empty.
// But if any of them was not empty before then it means that
// the transformed emptied the value
if v.originalName != "" && v.name != "" && after == "" {
log.Fatalf("transformation of %q (%s) got an empty result", v.name, v.originalName)
}
values[i].name = after
}
}