https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99158
Bug ID: 99158
Summary: [Enhancement] Better error message when missing
#include<new> and using placement new
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: kirshamir at gmail dot com
Target Milestone: ---
Use of placement new requires #include <new>
Without this include the error message is something like:
error: no matching function for call to 'operator new(sizetype, A*)'
8 | new (this) A(other);
| ^
note: candidate function not viable: no known conversion from 'A *' to
'std::align_val_t' for 2nd argument
note: candidate function not viable: requires 1 argument, but 2 were provided
Many std headers have #include <new> thus users just usually write placement
new without a special include and everything works fine, but when code moves
around above error message may just pop up.
A better error might be:
error: no matching function for call to 'operator new'
Note: use of placement new requires #include <new>
...
