https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113812
Bug ID: 113812
Summary: Comma expression parsed as declaration when ambiguous
type name cast is present
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gabravier at gmail dot com
Target Milestone: ---
void f()
{
int(x), a, b, c, d, e, f, g, h, etc;
int(x), a, b, c, d, e, f, g, h, etc, (new int);
}
Clang parses this fine, but GCC errors out, complaining that:
<source>: In function 'void f()':
<source>:4:9: error: redeclaration of 'int x'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:9: note: 'int x' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:13: error: redeclaration of 'int a'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:13: note: 'int a' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:16: error: redeclaration of 'int b'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:16: note: 'int b' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:19: error: redeclaration of 'int c'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:19: note: 'int c' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:22: error: redeclaration of 'int d'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:22: note: 'int d' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:25: error: redeclaration of 'int e'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:25: note: 'int e' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:28: error: redeclaration of 'int f'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:28: note: 'int f' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:31: error: redeclaration of 'int g'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:31: note: 'int g' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:34: error: redeclaration of 'int h'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^
<source>:3:34: note: 'int h' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^
<source>:4:37: error: redeclaration of 'int etc'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^~~
<source>:3:37: note: 'int etc' previously declared here
3 | int(x), a, b, c, d, e, f, g, h, etc;
| ^~~
<source>:4:43: error: expected unqualified-id before 'new'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ^~~
<source>:4:43: error: expected ')' before 'new'
4 | int(x), a, b, c, d, e, f, g, h, etc, (new int);
| ~^~~
| )
It appears that GCC is treating the second statement in the function as a
declaration instead of a comma expression, which Clang does.
