[llvm-bugs] [Bug 46853] New: Can not handle attribute parameters in C++11/C2a style

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46853

            Bug ID: 46853
           Summary: Can not handle attribute parameters in C++11/C2a style
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: lgamma at 163.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

use Attribute plugin example in clang but let ``NumArgs = 1;``

this input

[[example("foo")]]int foo(void) {
  return 1;
}

will output
foo.c: error: 'example' attribute takes one argument
[[example("some_str")]]int add_(int a, int b) {

in gnu style
int bar(void) __attribute__((example("some_attr"))) {
  return 1;
}
is ok.

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