https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94207
Bug ID: 94207
Summary: error: pasting "::" and "ClassFOO1" does not give a
valid preprocessing token
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: jr at heisey dot org
Target Milestone: ---
Created attachment 48051
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48051&action=edit
Example showing error of pasting using ## operator with enum class identifiers
gcc (GCC) 8.3.1 20190311 (Red Hat 8.3.1-3)
When referencing identifiers from an enum class in a macro and trying to scope
the enum class name using the '::' scoping operator, results in the operator
not being associated with the enum class name.
MacrosAndEnums.cpp:13:36: error: pasting "::" and "ClassFOO1" does not give a
valid preprocessing token
mEnumClassTest[k] = EnumClassTest:: ## k;
^~
MacrosAndEnums.h:22:5: note: in expansion of macro ‘ENUM_CLASS_TEST_INIT’
m(ClassFOO1) \
^
MacrosAndEnums.cpp:22:3: note: in expansion of macro ‘ENUM_CLASS_LIST’
ENUM_CLASS_LIST(ENUM_CLASS_TEST_INIT)
^~~~~~~~~~~~~~~
