https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95723
Bug ID: 95723
Summary: GCC get confused while parsing a code
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
Target Milestone: ---
This code test.cc, GCC might get confused in parsing.
$cat test.cc
template <a> friend foo ( decltype (b=c
$g++-trunk -w test.cc
test.cc:1:12: error: ‘a’ has not been declared
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:14: error: ‘friend’ used outside of class
1 | template <a>friend foo( decltype (b=c
| ^~~~~~
| ------
test.cc:1:36: error: ‘b’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
test.cc:1:38: error: ‘c’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:2: error: expected ‘,’ or ‘...’ at end of input
test.cc:1:39: error: expected ‘)’ at end of input
1 | template <a>friend foo( decltype (b=c
| ~ ^
| )
test.cc:2: error: expected initializer at end of input
$g++-10 -w test.cc
test.cc:1:12: error: ‘a’ has not been declared
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:14: error: ‘friend’ used outside of class
1 | template <a>friend foo( decltype (b=c
| ^~~~~~
| ------
test.cc:1:36: error: ‘b’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
test.cc:1:38: error: ‘c’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
test.cc:1:38: error: ‘c’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
test.cc:1:38: error: ‘c’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:21: error: ISO C++ forbids declaration of ‘foo’ with no type
[-fpermissive]
1 | template <a>friend foo( decltype (b=c
| ^~~
test.cc:1:36: error: ‘b’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:36: error: ‘b’ was not declared in this scope
test.cc:1:38: error: ‘c’ was not declared in this scope
1 | template <a>friend foo( decltype (b=c
| ^
test.cc:1:39: error: expected ‘)’ at end of input
1 | template <a>friend foo( decltype (b=c
| ~ ~^
| )
test.cc:1:26: error: expected primary-expression before ‘decltype’
1 | template <a>friend foo( decltype (b=c
| ^~~~~~~~~~~~~
test.cc:1:39: error: expected ‘;’ at end of input
1 | template <a>friend foo( decltype (b=c
| ~~~~~~~~~~~~~^
| ;
I am sure that some error messages in GCC-10 are duplicated. I am also
wondering why GCC-trunk emits "error: expected initializer at end of input",
that's so confusing.
