Vladimir Glavnyy 0e453ac352 [idl_parser] Add kTokenNumericConstant token (#6432) ...

* [idl_parser] Add kTokenNumericConstant token

This commit adds the new token for correct parsing of signed numeric constants.
Before this expressions `-nan` or `-inf` were treated as kTokenStringConstant.
This was ambiguous if a real string field parsed.
For example, `{ "text_field" : -name }` was accepted by the parser as valid JSON object.

Related oss-fuzz issue: 6200301176619008

* Add additional positive tests fo 'inf' and 'nan' as identifiers

* Rebase to HEAD

* Move processing of signed constants to ParseSingleValue method.

* Add missed `--cpp-static-reflection` (#6324) to pass CI

* Remove `flatbuffers.pc` from repository to unblock CI (#6455).

Probably the generated flatbuffers.pc should not be a part of repo.

* Fix FieldIdentifierTest()

2021-03-11 11:12:06 -08:00

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