expect

Unwraps a result, yielding the content of expected value. If there is none, or error value, it throws assert(0) with the provided message.

T expect(auto ref EX res, lazy string msg)
@safe
T
expect
(
EX : Expected!(T, E, H)
T
E
H
)
(
auto ref EX res
,
lazy string msg
)
T expect(auto ref EX res)

Parameters

res: Type: EX
Expected to check the result of
msg: Type: string
message to use with assert

Examples

assert(ok(42).expect("oops") == 42);
ok().expect("oops"); // void value
assert(collectExceptionMsg!Throwable(Expected!int.init.expect("oops")) == "oops: empty");
assert(collectExceptionMsg!Throwable(err!int("foo").expect("oops")) == "oops: foo");

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