| Issue |
140057
|
| Summary |
Unexpected error when passing a type to an unidentified preprocessor definition
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Anthony-Nicholls
|
Given the following code...
```cpp
class T{};
void f()
{
UNDEFINED_MACRO (T);
}
```
https://godbolt.org/z/5WjGM4KE6
we might expect an error regarding the undeclared identifier `UNDEFINED_MACRO` however, in this specific case we get `'T' does not refer to a value`.
If we change the code to so that it passes a variable instead of a type, for example...
```cpp
void f()
{
int i;
UNDEFINED_MACRO (i);
}
```
https://godbolt.org/z/YT1GGPG4Y
then the error is the more expected `use of undeclared identifier 'UNDEFINED_MACRO'`.
gcc and MSVC both appear to error as we might expect in this scenario.
I've tested this using trunk on CompilerExplorer as linked above.
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