32 lines
1.2 KiB
TypeScript
32 lines
1.2 KiB
TypeScript
export type Type =
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| { kind: 'union', variants: VariantMap } // zero: never
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| SimpleType
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export type SimpleType = FieldType | RecordType
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export type FieldType =
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| { kind: 'unit' }
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| { kind: 'array', type: FieldType }
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| { kind: 'set', type: FieldType }
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| { kind: 'dictionary', key: FieldType, value: FieldType }
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| { kind: 'ref', typeName: string } // also for base types
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export type RecordType =
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| { kind: 'record', fields: FieldMap }
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export type VariantMap = Map<string, SimpleType>;
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export type FieldMap = Map<string, FieldType>;
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export namespace Type {
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export const union = (variants: VariantMap): Type => ({ kind: 'union', variants });
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export const unit = (): FieldType => ({ kind: 'unit' });
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export const ref = (typeName: string): FieldType => ({ kind: 'ref', typeName });
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export const array = (type: FieldType): FieldType => ({ kind: 'array', type });
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export const set = (type: FieldType): FieldType => ({ kind: 'set', type });
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export const dictionary = (key: FieldType, value: FieldType): FieldType => (
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{ kind: 'dictionary', key, value });
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export const record = (fields: FieldMap): RecordType => ({ kind: 'record', fields });
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}
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export const ANY_TYPE: FieldType = Type.ref('_val');
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