mirror of https://github.com/catchorg/Catch2.git
60 lines
1.8 KiB
Markdown
60 lines
1.8 KiB
Markdown
<a id="top"></a>
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# Deprecations and incoming changes
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This page documents current deprecations and upcoming planned changes
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inside Catch2. The difference between these is that a deprecated feature
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will be removed, while a planned change to a feature means that the
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feature will behave differently, but will still be present. Obviously,
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either of these is a breaking change, and thus will not happen until
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at least the next major release.
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### Composing lvalues of already composed matchers
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Because a significant bug in this use case has persisted for 2+ years
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without a bug report, and to simplify the implementation, code that
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composes lvalues of composed matchers will not compile. That is,
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this code will no longer work:
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```cpp
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auto m1 = Contains("string");
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auto m2 = Contains("random");
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auto composed1 = m1 || m2;
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auto m3 = Contains("different");
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auto composed2 = composed1 || m3;
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REQUIRE_THAT(foo(), !composed1);
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REQUIRE_THAT(foo(), composed2);
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```
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Instead you will have to write this:
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```cpp
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auto m1 = Contains("string");
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auto m2 = Contains("random");
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auto m3 = Contains("different");
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REQUIRE_THAT(foo(), !(m1 || m2));
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REQUIRE_THAT(foo(), m1 || m2 || m3);
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```
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## Planned changes
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### `CHECKED_IF` and `CHECKED_ELSE`
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To make the `CHECKED_IF` and `CHECKED_ELSE` macros more useful, they will
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be marked as "OK to fail" (`Catch::ResultDisposition::SuppressFail` flag
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will be added), which means that their failure will not fail the test,
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making the `else` actually useful.
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### Console Colour API
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The API for Catch2's console colour will be changed to take an extra
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argument, the stream to which the colour code should be applied.
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---
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[Home](Readme.md#top)
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