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import {Option} from "fp-ts/lib/Option"
import { constructors, Union } from "./utils"
type _ = never
export type Expr = Union<{
Start: _,
End: _,
Optional: { expr: Expr },
OneOrMore: { expr: Expr },
ZeroOrMore: { expr: Expr },
NextItem: _,
AnyItem: _,
Or: { left: Expr, right: Expr[] },
AnyString: _,
AnyNumber: _,
AnyBool: _,
Truthy: _,
Falsey: _,
Group: { exprs: Expr[] },
PropertyMatch: { name: string, exprs: Expr[] },
}>
export const Expr = constructors<Expr>()
export type ListExpr = [
Option<Expr>,
Expr[],
Option<Expr>,
]
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