Joeri Exelmans
8eec5b9239
big part of the code base still needs to be 'ported' to the updated type constructors.
29 lines
1 KiB
JavaScript
29 lines
1 KiB
JavaScript
// Total ordering of primitive types
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export const compareNumbers = x => y => {
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if (typeof(x) !== 'number' || typeof(y) !== 'number') {
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throw new Error(`was only meant to compare numbers! got ${x} and ${y}`);
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}
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return (x < y) ? -1 : (x > y) ? 1 : 0;
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}
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export const compareStrings = x => y => {
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if (typeof(x) !== 'string' || typeof(y) !== 'string') {
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throw new Error(`was only meant to compare strings! got ${x} and ${y}`);
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}
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return (x < y) ? -1 : (x > y) ? 1 : 0;
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}
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export const compareBools = x => y => {
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if (typeof(x) !== 'boolean' || typeof(y) !== 'boolean') {
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throw new Error(`was only meant to compare booleans! got ${x} and ${y}`);
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}
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return x - y;
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};
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// The Unit-type has only one instance, which is equal to itself:
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export const compareUnits = x => y => 0;
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// Note: dirty assumption that every symbol has unique description.
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// This will be fixed once we move from symbols to real UUIDs.
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export const compareSymbols = a => b => Number(a !== b) && compareStrings(a.description)(b.description);
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