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In order to avoid stashing all the tokens corresponding to a JSON value, embed the parsing stack and state machine in JSONParser. This is more efficient and allows for more prompt error recovery; it also does not make the code substantially larger than the current recursive descent parser, though the state machine is probably a bit harder to follow. The stack consists of QLists and QDicts corresponding to open brackets and braces, plus optionally a QString with the current key on top of each QDict. After each value is parsed, it is added to the top array or dictionary or, if the stack is empty, json_parser_feed returns the complete QObject. For now, json-streamer.c keeps tracking the tokens up until braces and brackets are balanced, and then shoves the whole queue of tokens into the push parser. The only logic change is that JSON_END_OF_INPUT always triggers the emptying of the queue; the parser takes notice and checks that there is nothing on the stack. Not using brace_count and bracket_count for this is the first step towards improved separation of concerns between json-parser.c and json-streamer.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20260626101727.1727389-2-pbonzini@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Minor comment improvements] Signed-off-by: Markus Armbruster <armbru@redhat.com>