File: cxx2a-init-statement.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 (44 lines) | stat: -rw-r--r-- 1,806 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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
// RUN: %clang_cc1 -std=c++2a -verify %s

template<int N> struct A {};

using F = bool(*)(int);
extern F *p;
extern int m;

struct Convertible { template<typename T> operator T(); };

void f() {
  int arr1[3];
  for (int n = 5; int x : arr1) {}

  int A<0>::*arr2[3];
  for (int n = 5; int A<true ? 0 : 1>::*x : arr2) {}

  for (int i = 0; int x = i < 2 ? 1 : 0; i++) {}

  F (*arr3[3])(int);
  for (int n = 5; F (*p)(int n) : arr3) {}
  for (int n = 5; F (*p)(int (n)) : arr3) {}

  // Here, we have a declaration rather than an expression.
  for (int n = 5; F (*p)(int (n)); ++n) {}

  // We detect whether we have a for-range-declaration before parsing so that
  // we can give different diagnostics for for-range-declarations versus
  // conditions (even though the rules are currently identical).
  Convertible arr4[3];
  for (int n = 0; struct { operator bool(); } x = {}; ++n) {} // expected-error {{cannot be defined in a condition}}
  for (int n = 0; struct { operator bool(); } x : arr4) {} // expected-error {{may not be defined in a for range declaration}}

  for (int n = 0; static int m = 0; ++n) {} // expected-error {{type name does not allow storage class}}
  for (int n = 0; static int m : arr1) {} // expected-error {{loop variable 'm' may not be declared 'static'}}

  // The init-statement and range are not break / continue scopes. (But the body is.)
  for (int n = ({ break; 0; }); int m : arr1) {} // expected-error {{not in loop}}
  for (int n = ({ continue; 0; }); int m : arr1) {} // expected-error {{not in loop}}
  for (int arr[3]; int n : *({ break; &arr; })) {} // expected-error {{not in loop}}
  for (int arr[3]; int n : *({ continue; &arr; })) {} // expected-error {{not in loop}}
  for (int n = 0; int m : arr1) { break; }
  for (int n = 0; int m : arr1) { continue; }
}