YamlParserContext is a friend of the YamlObject class to access private
member variables. Now that YamlObject exposes functions to set a value
and add children, this is not needed anymore. Decouple the two classes.
The YamlParserContext::readValue() function now takes a const reference
to the EventPtr as the YamlParserContext::parseNextYamlObject() function
needs to access it in the error handler.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
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