TypeScript/tests/baselines/reference/discriminatedUnionFlatMap.symbols at 96faf0a3aea3047945dbb68782b73c0e07e3e7f9 · jakebailey/TypeScript · GitHub

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//// [tests/cases/compiler/discriminatedUnionFlatMap.ts] ////

=== discriminatedUnionFlatMap.ts ===
// https://github.com/microsoft/typescript-go/issues/1057

export type InputOp = { op: "add" } | { op: "remove"; value?: Array<unknown> };
>InputOp : Symbol(InputOp, Decl(discriminatedUnionFlatMap.ts, 0, 0))
>op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 2, 23))
>op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 2, 39))
>value : Symbol(value, Decl(discriminatedUnionFlatMap.ts, 2, 53))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --) ... and 2 more)

export type OutputOp = { op: "add" | "remove" };
>OutputOp : Symbol(OutputOp, Decl(discriminatedUnionFlatMap.ts, 2, 79))
>op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 3, 24))

export function f(operations: InputOp[]): OutputOp[] {
>f : Symbol(f, Decl(discriminatedUnionFlatMap.ts, 3, 48))
>operations : Symbol(operations, Decl(discriminatedUnionFlatMap.ts, 5, 18))
>InputOp : Symbol(InputOp, Decl(discriminatedUnionFlatMap.ts, 0, 0))
>OutputOp : Symbol(OutputOp, Decl(discriminatedUnionFlatMap.ts, 2, 79))

    return operations.flatMap((operation) => {
>operations.flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
>operations : Symbol(operations, Decl(discriminatedUnionFlatMap.ts, 5, 18))
>flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
>operation : Symbol(operation, Decl(discriminatedUnionFlatMap.ts, 6, 31))

        if (operation.op === "remove" && operation.value) {
>operation.op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 2, 23), Decl(discriminatedUnionFlatMap.ts, 2, 39))
>operation : Symbol(operation, Decl(discriminatedUnionFlatMap.ts, 6, 31))
>op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 2, 23), Decl(discriminatedUnionFlatMap.ts, 2, 39))
>operation.value : Symbol(value, Decl(discriminatedUnionFlatMap.ts, 2, 53))
>operation : Symbol(operation, Decl(discriminatedUnionFlatMap.ts, 6, 31))
>value : Symbol(value, Decl(discriminatedUnionFlatMap.ts, 2, 53))

            return [].map(() => ({ op: "remove" }));
>[].map : Symbol(Array.map, Decl(lib.es5.d.ts, --, --))
>map : Symbol(Array.map, Decl(lib.es5.d.ts, --, --))
>op : Symbol(op, Decl(discriminatedUnionFlatMap.ts, 8, 34))

        } else {
            return [operation];
>operation : Symbol(operation, Decl(discriminatedUnionFlatMap.ts, 6, 31))
        }
    });
}