HsYAML is a YAML 1.2 parser implementation for Haskell.
Features of HsYAML include:
Pure Haskell implementation with small dependency footprint and emphasis on strict compliance with the YAML 1.2 specification.
Direct decoding to native Haskell types via (aeson-inspired) typeclass-based API (see Data.YAML).
Support for constructing custom YAML node graph representation (including support for cyclic YAML data structures).
Support for the standard (untyped) Failsafe, (strict) JSON, and (flexible) Core "schemas" providing implicit typing rules as defined in the YAML 1.2 specification (including support for user-defined custom schemas).
Event-based API resembling LibYAML's Event-based API (see Data.YAML.Event).
Low-level API access to lexical token-based scanner (see Data.YAML.Token).
Add convenience functions decode1 and decode1Strict expecting exactly one YAML document (#5)
Fix a couple corner-cases in the YAML tokenization (#10)
0.1.1.3
Fix bug in float regexp being too lax in the JSON and Core schema (#7)
Remove dependency on dlist
0.1.1.2
Tolerate BOM at eachl-document-prefix (rather than only at the first one encountered in a YAML stream)
Workaround broken mtl-2.2.2 bundled in GHC 8.4.1 (#1)
Relax to GPL-2.0-or-later
0.1.1.1
Reject (illegal) non-scalar code-points in UTF-32 streams
Tolerate BOM at start of stream
Disambiguate choice in l-any-document production regarding token separation of c-directives-end
Fix c-indentation-indicator(n) grammar production when
auto-detecting indentation in the presence of empty leading lines;
also reject (illegal) auto-indent-level scalars with leading
more-indented all-space lines
Complete character escape rules for double-quoted scalars
Minor optimizations
0.1.1.0
Data.YAML module promoted from TrustWorthy to Safe
Add FromYAML Natural instance
Add MonadFail, Alternative, and MonadPlus instances for Data.YAML.Parser
