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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 1x 1x 1x 1x 4x 3x 1x | import type { ValidParameterTypeName, RawParameterType } from '../ValidParameterTypeName'; import type { IParameterBuilder } from './IParameterBuilder'; export class GuardParameterBuilder<TypeName extends ValidParameterTypeName, T extends RawParameterType<TypeName>> implements IParameterBuilder<TypeName, T> { public constructor( private readonly typeName: TypeName, private readonly typeGuard: (value: RawParameterType<TypeName>) => value is T ) {} public get expectedTypes(): Set<TypeName> { return new Set([this.typeName]); } public build(value: RawParameterType<TypeName>): T { if (!this.typeGuard(value)) throw new Error('Invalid parameter, type guard failed.'); return value; } } |