File: warn-pure-virtual-call-from-ctor-dtor.cpp

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (22 lines) | stat: -rw-r--r-- 785 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
// RUN: %clang_cc1 %s -fsyntax-only -verify -Wcall-to-pure-virtual-from-ctor-dtor
struct A {
  A() { f(); } // expected-warning {{call to pure virtual member function 'f' has undefined behavior; overrides of 'f' in subclasses are not available in the constructor of 'A'}}
  ~A() { f(); } // expected-warning {{call to pure virtual member function 'f' has undefined behavior; overrides of 'f' in subclasses are not available in the destructor of 'A'}}

  virtual void f() = 0; // expected-note 2 {{'f' declared here}}
};

// Don't warn (or note) when calling the function on a pointer. (PR10195)
struct B {
  A *a;
  B() { a->f(); };
  ~B() { a->f(); };
};

// Don't warn if the call is fully qualified. (PR23215)
struct C {
    virtual void f() = 0;
    C() {
        C::f();
    }
};