https://bugs.llvm.org/show_bug.cgi?id=44692
Bug ID: 44692
Summary: clang reports error from macro for wrong line
Product: clang
Version: 9.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: schopf....@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Compiling the attached code produces a misleading error message because the
indicated line is wrong.
Steps to reproduce:
1. Compile this code:
#define ALL_COMMANDS \
CMD(Play) \
CMD(Stop)
struct base {
virtual int Play() = 0;
};
struct foo : public base {
#define CMD(a) \
int a() override { \
return 0; \
}
ALL_COMMANDS
};
Actual result:
test.cpp:15:2: error: only virtual member functions can be marked 'override'
ALL_COMMANDS
^
test.cpp:2:11: note: expanded from macro 'ALL_COMMANDS'
CMD(Play) \
^
test.cpp:11:11: note: expanded from macro '\
CMD'
int a() override { \
^
1 error generated.
Expected result:
The actual error comes from line 3, which is CMD(Stop), and not line 2. This
can be very misleading when trying to fix the error.
This also happens with the latest trunk: https://godbolt.org/z/DUrFwo
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