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C++: Ensure we can round trip between (forward) class declarations

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This was already possible when the forward class declaration and the class
definition occurred in the same scope. However, there is a common C++ usage
pattern in which this is not the case (when only a pointer to the class is
needed). In this latter scenario we could not round trip between the (forward)
`DeclarationEntry` and the `Declaration`.

Effectively this changes the code to:
```
if exists(TypeDeclarationEntry e | e.getType() = this)
then result.getType() = this
else ...
```
We use `type_decls` instead to stay close to the original code.
This commit is contained in:
Jeroen Ketema
2022-06-22 07:43:50 +02:00
parent a8833a0c70
commit 880c785efe
3 changed files with 4 additions and 4 deletions
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2
cpp/ql/test/library-tests/declarationEntry/declarationEntry/declarationEntry.expected
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@@ -30,7 +30,7 @@
| declarationEntry.cpp:39:7:39:7 | operator= | declarationEntry.cpp:39:7:39:7 | declaration of operator= | 1 | 1 |
| declarationEntry.cpp:39:7:39:7 | operator= | declarationEntry.cpp:39:7:39:7 | declaration of operator= | 1 | 1 |
| declarationEntry.cpp:39:7:39:13 | myClass | declarationEntry.cpp:39:7:39:13 | definition of myClass | 1 | 1 |
| declarationEntry.cpp:39:7:39:13 | myClass | forwardDeclaration.cpp:1:7:1:13 | declaration of myClass | 0 | 1 |
| declarationEntry.cpp:39:7:39:13 | myClass | forwardDeclaration.cpp:1:7:1:13 | declaration of myClass | 1 | 1 |
| declarationEntry.cpp:42:6:42:21 | myMemberVariable | declarationEntry.cpp:42:6:42:21 | definition of myMemberVariable | 1 | 1 |
| forwardDeclaration.cpp:3:10:3:19 | myClassPtr | forwardDeclaration.cpp:3:10:3:19 | definition of myClassPtr | 1 | 1 |
| macro.c:2:1:2:3 | foo | macro.c:2:1:2:3 | declaration of foo | 1 | 1 |

2
cpp/ql/test/library-tests/declarationEntry/declarationEntry/roundTrip.expected
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@@ -39,7 +39,7 @@
| file://:0:0:0:0 | definition of gp_offset | file://:0:0:0:0 | gp_offset | yes |
| file://:0:0:0:0 | definition of overflow_arg_area | file://:0:0:0:0 | overflow_arg_area | yes |
| file://:0:0:0:0 | definition of reg_save_area | file://:0:0:0:0 | reg_save_area | yes |
| forwardDeclaration.cpp:1:7:1:13 | declaration of myClass | declarationEntry.cpp:39:7:39:13 | myClass | no |
| forwardDeclaration.cpp:1:7:1:13 | declaration of myClass | declarationEntry.cpp:39:7:39:13 | myClass | yes |
| forwardDeclaration.cpp:3:10:3:19 | definition of myClassPtr | forwardDeclaration.cpp:3:10:3:19 | myClassPtr | yes |
| macro.c:2:1:2:3 | declaration of foo | macro.c:2:1:2:3 | foo | yes |
| macro.c:4:5:4:8 | definition of main | macro.c:4:5:4:8 | main | yes |