26 lines
532 B
Markdown
26 lines
532 B
Markdown
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# 11-haskell-typeclasses
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This example shows intermediate Haskell abstraction with a custom type class and several instances.
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It includes:
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- a custom `Renderable` type class,
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- instances for domain types and a report wrapper,
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- a small CLI that uses one shared rendering interface, and
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- a test suite run by `nix flake check`.
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Useful commands:
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```bash
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nix develop
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cabal run
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cabal run -- production failed 2
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cabal test
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nix build
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./result/bin/mini-render production failed 2
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nix run . -- production failed 2
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nix flake check
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```
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