Support `required` keyword

ksprojects / protobuf-jetbrains-plugin

Protobuf Support for JetBrains IDEs

https://plugins.jetbrains.com/plugin/8277

Apache License 2.0

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Closed Jeff-Tian closed 5 years ago

Jeff-Tian commented 5 years ago

Highlight the keyword required.

Currently the keyword required is not supported, and shows an error message:

Field Label 'required' is not allowed.

kshchepanovskyi commented 5 years ago

Required fields are not supported in proto3.

Message fields can be one of the following:

singular: a well-formed message can have zero or one of this field (but not more than one).
repeated: this field can be repeated any number of times (including zero) in a well-formed message. The order of the repeated values will be preserved.

Jeff-Tian commented 5 years ago

Thanks @kshchepanovskyi