Method constructor

contextKeyExpr/src/contextkey.ts:849–851

(private readonly key: string, private readonly regexp: RegExp | null)

	public readonly type = ContextKeyExprType.Regex;

	private constructor(private readonly key: string, private readonly regexp: RegExp | null) {
		//
	}

	public cmp(other: ContextKeyExpression): number {
		if (other.type !== this.type) {