FGasper / p5-CBOR-Free / 29217547360

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github

Add opt-in duplicate map key rejection (#11)

This adds opt-in duplicate map key rejection to `CBOR::Free::Decoder` and `CBOR::Free::SequenceDecoder`, following [RFC 8949, Section 5.6](https://www.rfc-editor.org/rfc/rfc8949.html#section-5.6).

```perl
my $decoder = CBOR::Free::Decoder->new;
$decoder->reject_duplicate_keys();

# {"a": 1, "a": 2}
my $cbor = pack 'H*', 'a2616101616102';

$decoder->decode($cbor);
# Dies with CBOR::Free::X::DuplicateMapKey
```

Default decoding behavior remains unchanged. The full test suite passes.

7 of 7 new or added lines in 2 files covered. (100.0%)

280 of 294 relevant lines covered (95.24%)

867.81 hits per line