Parse exception raised for combination of .: and .!=
quintenkasteel opened this issue · 2 comments
We use aeson-1.4.7.1.
The following code raises an exception:
for the type:
data = Field {field :: Text}
field .: "fieldName" .!= ""
raises an exception.
It would be great if this could raise an compile error instead.
I don't understand. What you mean by raises an exception?
Please provide a complete reproducer.
If i have a JSON record that looks like the following:
{ "fieldName": null }
If i use the parser: field .: "fieldName" .!= ""
it will compile. But it will always raise an JSONConversionException:
"key "fieldName" not found"
I would like to get an compile error, as this code is not valid. The parser should use the parser for Maybe values:
field .:? "fieldName" .!= ""
I can code a minimal example if you need more clarification.