forked from OSchip/llvm-project
56 lines
2.5 KiB
C++
56 lines
2.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions -Wuninitialized-const-reference -verify %s
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class A {
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public:
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int i;
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A(){};
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A(const A &a){};
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A(int i) {}
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bool operator!=(const A &);
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};
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template <class T>
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void ignore_template(const T &) {}
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void ignore(const int &i) {}
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void dont_ignore_non_empty(const int &i) { ; } // Calling this won't silence the warning for you
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void dont_ignore_block(const int &i) {
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{}
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} // Calling this won't silence the warning for you
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void ignore_function_try_block_maybe_who_knows(const int &) try {
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} catch (...) {
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}
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A const_ref_use_A(const A &a);
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int const_ref_use(const int &i);
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A const_use_A(const A a);
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int const_use(const int i);
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void f(int a) {
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int i;
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const_ref_use(i); // expected-warning {{variable 'i' is uninitialized when passed as a const reference argument here}}
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int j = j + const_ref_use(j); // expected-warning {{variable 'j' is uninitialized when used within its own initialization}} expected-warning {{variable 'j' is uninitialized when passed as a const reference argument here}}
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A a1 = const_ref_use_A(a1); // expected-warning {{variable 'a1' is uninitialized when passed as a const reference argument here}}
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int k = const_use(k); // expected-warning {{variable 'k' is uninitialized when used within its own initialization}}
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A a2 = const_use_A(a2); // expected-warning {{variable 'a2' is uninitialized when used within its own initialization}}
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A a3(const_ref_use_A(a3)); // expected-warning {{variable 'a3' is uninitialized when passed as a const reference argument here}}
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A a4 = a3 != a4; // expected-warning {{variable 'a4' is uninitialized when used within its own initialization}} expected-warning {{variable 'a4' is uninitialized when passed as a const reference argument here}}
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int n = n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
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const_ref_use(n);
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A a5;
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const_ref_use_A(a5);
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int m;
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if (a < 42)
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m = 1;
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const_ref_use(m);
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int l;
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ignore_template(l); // This is a pattern to avoid "unused variable" warnings (e.g. boost::ignore_unused).
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ignore(l);
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dont_ignore_non_empty(l); // expected-warning {{variable 'l' is uninitialized when passed as a const reference argument here}}
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int l1;
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dont_ignore_block(l1); // expected-warning {{variable 'l1' is uninitialized when passed as a const reference argument here}}
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int l2;
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ignore_function_try_block_maybe_who_knows(l2); // expected-warning {{variable 'l2' is uninitialized when passed as a const reference argument here}}
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}
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