File: using-if-exists-attr.cpp

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (27 lines) | stat: -rw-r--r-- 1,263 bytes parent folder | download | duplicates (22) 
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}}
};