TechQA.

Question

Why does std::expected<T, E> require T to be copy-constructible if it is copy-assignable?

score 176 · Answer 1 · 2024-03-02T21:13:38.000000

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Why does std::expected<T, E> require T to be copy-constructible if it is copy-assignable?

176 views Asked by Voko At 02 March 2024 at 21:13

score 221 · Answer 2 · 2023-11-12T16:27:15.517000

Is this behavior of std::expected with move-only types a MSVC bug or undefined behavior?

221 views Asked by dw218192 At 12 November 2023 at 16:27

score 150 · Answer 3 · 2023-11-11T15:33:20.180000

Compressed std::expected

150 views Asked by sh- At 11 November 2023 at 15:33

score 281 · Answer 4 · 2023-10-16T23:46:27.610000

Is this a correct convenience wrapper for std::expected?

281 views Asked by dw218192 At 16 October 2023 at 23:46

score 105 · Answer 5 · 2023-09-24T16:43:41.720000

What to do about exceptions which don't fit your Expected error type?

105 views Asked by einpoklum At 24 September 2023 at 16:43

score 871 · Answer 6 · 2023-06-12T22:16:48.693000

When to use std::expected instead of exceptions

871 views Asked by Jan Schultke At 12 June 2023 at 22:16

score 200 · Answer 7 · 2023-06-12T12:35:08.520000

How to avoid calling the destructor twice when using a factory function with a std::expected return without runtime costs

200 views Asked by Sickeroni At 12 June 2023 at 12:35

score 185 · Answer 8 · 2023-04-19T13:49:49.947000

Is that possible to upcast erased type without RTTI?

185 views Asked by Artem Selivanov At 19 April 2023 at 13:49

score 287 · Answer 9 · 2023-03-18T13:24:28.200000

std::unexpected constructor constraint

287 views Asked by NotMe At 18 March 2023 at 13:24

score 546 · Answer 10 · 2023-03-12T09:03:58.687000

How to use std::expected in conjunction with std::transform?

546 views Asked by Raildex At 12 March 2023 at 09:03

score 505 · Answer 11 · 2023-02-20T22:35:35.557000

std::expected, references, and std::reference_wrapper

505 views Asked by NeitherNor At 20 February 2023 at 22:35

score 2689 · Answer 12 · 2022-08-03T21:09:51.897000

C++ is there an implementation of std::expected that doesn't consider a default constructed `expected` to have a value?

2.6k views Asked by Tom At 03 August 2022 at 21:09

score 1233 · Answer 13 · 2022-02-09T00:56:52.323000

Why are there no monadic operations in std::expected?

1.2k views Asked by Desmond Gold At 09 February 2022 at 00:56

score 24346 · Answer 14 · 2021-07-13T19:50:22.870000

What is std::expected in C++?

24.3k views Asked by Fedor At 13 July 2021 at 19:50

TechQA.

List Question

Why does std::expected<T, E> require T to be copy-constructible if it is copy-assignable?

Is this behavior of std::expected with move-only types a MSVC bug or undefined behavior?

Compressed std::expected

Is this a correct convenience wrapper for std::expected?

What to do about exceptions which don't fit your Expected error type?

When to use std::expected instead of exceptions

How to avoid calling the destructor twice when using a factory function with a std::expected return without runtime costs

Is that possible to upcast erased type without RTTI?

std::unexpected constructor constraint

How to use std::expected in conjunction with std::transform?

std::expected, references, and std::reference_wrapper

C++ is there an implementation of std::expected that doesn't consider a default constructed `expected` to have a value?

Why are there no monadic operations in std::expected?

What is std::expected in C++?

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