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* [Bug c++/95724] New: bogue error : "expected '{' before ')' token"
@ 2020-06-17 16:45 haoxintu at gmail dot com
  2020-06-17 17:43 ` [Bug c++/95724] " marxin at gcc dot gnu.org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: haoxintu at gmail dot com @ 2020-06-17 16:45 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95724

            Bug ID: 95724
           Summary: bogue error : "expected '{' before ')' token"
           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-trunk get a bogus error message and then get confused
with following code parsing.

$cat test.cc
template <(union : decltype(a = 0)>)


$g++-trunk -w -c test.cc
test.cc:1:11: error: expected identifier before ‘(’ token
    1 | template <(union : decltype(a = 0)>)
      |           ^
test.cc:1:29: error: ‘a’ was not declared in this scope
    1 | template <(union : decltype(a = 0)>)
      |                             ^
test.cc:1:29: error: ‘a’ was not declared in this scope
test.cc:1:34: error: expected ‘{’ before ‘)’ token
    1 | template <(union : decltype(a = 0)>)
      |                                  ^
test.cc:1:36: error: expected unqualified-id before ‘)’ token
    1 | template <(union : decltype(a = 0)>)
      |                                    ^

$g++-10 -w -c test.cc
test.cc:1:11: error: expected identifier before ‘(’ token
    1 | template <(union : decltype(a = 0)>)
      |           ^
test.cc:1:29: error: ‘a’ was not declared in this scope
    1 | template <(union : decltype(a = 0)>)
      |                             ^
test.cc:1:29: error: ‘a’ was not declared in this scope
test.cc:1:35: error: expected ‘{’ before ‘>’ token
    1 | template <(union : decltype(a = 0)>)
      |                                   ^
test.cc:1:35: error: expected ‘,’ or ‘...’ before ‘>’ token
test.cc:1:36: error: expected ‘>’ at end of input
    1 | template <(union : decltype(a = 0)>)
      |                                    ^
test.cc:1:36: error: expected unqualified-id at end of input

I guess GCC-trunk emits the bogus error message "expected ‘{’ before ‘)’
token", and the following error messages are inconsistent with GCC-10. So,
GCC-trunk might have something wrong with while parsing this code.

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-01-07  2:35 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-06-17 16:45 [Bug c++/95724] New: bogue error : "expected '{' before ')' token" haoxintu at gmail dot com
2020-06-17 17:43 ` [Bug c++/95724] " marxin at gcc dot gnu.org
2020-06-17 17:54 ` haoxintu at gmail dot com
2020-06-17 18:58 ` marxin at gcc dot gnu.org
2020-06-18  8:33 ` rguenth at gcc dot gnu.org
2020-06-18  8:37 ` marxin at gcc dot gnu.org
2020-06-18 11:37 ` redi at gcc dot gnu.org
2020-06-18 12:25 ` rguenth at gcc dot gnu.org
2022-01-07  2:35 ` [Bug c++/95724] error message could be improved in the cascading error case pinskia at gcc dot gnu.org

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