Repository navigation
##: valid token pastes are rejected #724
Description
When the left operand of ## is an operator, valid pastes are rejected.
#define cat(a,b) a##b
cat(+,=)gcc: +=
simplecpp: syntax error: failed to expand 'cat', Invalid ## usage when expanding 'cat': Combining '+' and 'b' yields an invalid token.
| Input | gcc | simplecpp |
|---|---|---|
cat(+,=) |
+= |
error |
cat(<<,=) |
<<= |
error |
cat(-,>) |
-> |
error |
cat(&,&) |
&& |
error |
cat(|,|) |
|| |
error |
cat(+,+) |
++ |
error |
#define B -##>⏎B |
-> |
error: Unexpected token '>' |
Activity
Fix cppcheck-opensource#724 (##: valid token pastes are rejected) (cp…