24 lines
611 B
Nix
24 lines
611 B
Nix
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{
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inputs,
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cell,
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}: let
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brand-ctor = name:
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assert builtins.isString name;
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v: {
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__brand = name;
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__value = v;
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};
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unbranded_name = "__unbranded__";
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unbranded_t = brand-ctor unbranded_name;
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brand-of = {
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__brand ? unbranded_name,
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__value ? null,
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}:
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__brand;
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brand-coalesce = v: if v ? __brand then v else unbranded_t v;
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in {
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inherit brand-ctor brand-of brand-coalesce unbranded_name;
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brand-group = seq: builtins.mapAttrs (_: builtins.map (v: v.__value)) (builtins.groupBy (brnd: brnd.__brand) seq);
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brand-coalesce-seq = builtins.map brand-coalesce;
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}
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