File: using-if-exists-attr.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (27 lines) | stat: -rw-r--r-- 1,263 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
// RUN: %clang_cc1 -std=c++20 -fsyntax-only %s -pedantic -verify

#define UIE __attribute__((using_if_exists))

namespace NS {
typedef int x;
}

using NS::x __attribute__((using_if_exists));

using NS::x [[clang::using_if_exists]]; // expected-warning{{ISO C++ does not allow an attribute list to appear here}}

[[clang::using_if_exists]] // expected-warning{{ISO C++ does not allow an attribute list to appear here}}
using NS::not_there,
    NS::not_there2;

using NS::not_there3,                          // expected-error {{no member named 'not_there3' in namespace 'NS'}}
    NS::not_there4 [[clang::using_if_exists]]; // expected-warning{{C++ does not allow an attribute list to appear here}}

[[clang::using_if_exists]] using NS::not_there5 [[clang::using_if_exists]]; // expected-warning 2 {{ISO C++ does not allow}}

struct Base {};
struct Derived : Base {
  [[clang::using_if_exists]] using Base::x;          // expected-warning {{ISO C++ does not allow an attribute list to appear here}}
  using Base::y [[clang::using_if_exists]];          // expected-warning {{ISO C++ does not allow an attribute list to appear here}}
  [[clang::using_if_exists]] using Base::z, Base::q; // expected-warning {{C++ does not allow an attribute list to appear here}}
};