3rd-party/catch2
1
0
Fork 0
mirror of https://github.com/catchorg/Catch2.git synced 2024-12-23 11:43:29 +01:00
Code Issues Packages Projects Releases Wiki Activity

Document that matcher combinators (&&, ||, !) do not take ownership

Browse Source 
Closes #1781
This commit is contained in:
Martin Hořeňovský 2019-10-26 21:07:38 +02:00
parent 50cc14c94c
commit c5c688820c
No known key found for this signature in database
GPG Key ID: DE48307B8B0D381A
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
docs/matchers.md
View File

@ -35,6 +35,22 @@ REQUIRE_THAT( str,
(StartsWith( "Big data" ) && !Contains( "web scale" ) ) ); (StartsWith( "Big data" ) && !Contains( "web scale" ) ) );
``` ```
_The combining operators do not take ownership of the matcher objects.
This means that if you store the combined object, you have to ensure that
the matcher objects outlive its last use. What this means is that code
like this leads to a use-after-free and (hopefully) a crash:_
```cpp
TEST_CASE("Bugs, bugs, bugs", "[Bug]"){
std::string str = "Bugs as a service";
auto match_expression = Catch::EndsWith( "as a service" ) ||
(Catch::StartsWith( "Big data" ) && !Catch::Contains( "web scale" ) );
REQUIRE_THAT(str, match_expression);
}
```
## Built in matchers ## Built in matchers
Catch2 provides some matchers by default. They can be found in the Catch2 provides some matchers by default. They can be found in the
`Catch::Matchers::foo` namespace and are imported into the `Catch` `Catch::Matchers::foo` namespace and are imported into the `Catch`