xso: allow omission of namespace and name on extracts
This is a quality-of-life improvement, as it may save lots of typing in the common case (see the diff in parsers).
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9 changed files with 129 additions and 54 deletions
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@ -316,6 +316,12 @@ expanded to the corresponding namespace URI and the value for the `namespace`
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key is implied. Mixing a prefixed name with an explicit `namespace` key is
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not allowed.
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Both `namespace` and `name` may be omitted. If `namespace` is omitted, it
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defaults to the namespace of the surrounding container. If `name` is omitted
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and the `extract` meta is being used on a named field, that field's name is
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used. If `name` is omitted and `extract` is not used on a named field, an
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error is emitted.
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The sequence of field meta inside `fields` can be thought of as a nameless
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tuple-style struct. The macro generates serialisation/deserialisation code
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for that nameless tuple-style struct and uses it to serialise/deserialise
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