File: coroutine-uninitialized-warning-crash.cpp

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,388 kB
  • sloc: cpp: 7,438,767; ansic: 1,393,871; asm: 1,012,926; python: 241,728; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (43 lines) | stat: -rw-r--r-- 862 bytes parent folder | download | duplicates (28) 
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
 
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 %s -std=c++20 -fsyntax-only -Wall -Wextra -Wuninitialized  -fblocks
#include "Inputs/std-coroutine.h"

using namespace std;

struct A {
  bool await_ready() { return true; }
  int await_resume() { return 42; }
  template <typename F>
  void await_suspend(F) {}
};


struct coro_t {
  struct promise_type {
    coro_t get_return_object() { return {}; }
    suspend_never initial_suspend() { return {}; }
    suspend_never final_suspend() noexcept { return {}; }
    A yield_value(int) { return {}; }
    void return_void() {}
    static void unhandled_exception() {}
  };
};

coro_t f(int n) {
  if (n == 0)
    co_return;
  co_yield 42;
  int x = co_await A{};
}

template <class Await>
coro_t g(int n) {
  if (n == 0)
    co_return;
  co_yield 42;
  int x = co_await Await{};
}

int main() {
  f(0);
  g<A>(0);
}