| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
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| 2 | |
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| 3 | template <int A, int B> void foo() { |
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| 4 | (void)(A == A); // expected-warning {{self-comparison always evaluates to true}} |
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| 5 | (void)(A == B); |
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| 6 | } |
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| 7 | template <int A, int B> struct S1 { |
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| 8 | void foo() { |
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| 9 | (void)(A == A); // expected-warning {{self-comparison always evaluates to true}} |
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| 10 | (void)(A == B); |
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| 11 | } |
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| 12 | }; |
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| 13 | |
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| 14 | template <int A, int B> struct S2 { |
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| 15 | template <typename T> T foo() { |
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| 16 | (void)(A == A); // expected-warning {{self-comparison always evaluates to true}} |
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| 17 | (void)(A == B); |
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| 18 | } |
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| 19 | }; |
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| 20 | |
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| 21 | struct S3 { |
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| 22 | template <int A, int B> void foo() { |
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| 23 | (void)(A == A); // expected-warning {{self-comparison always evaluates to true}} |
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| 24 | (void)(A == B); |
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| 25 | } |
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| 26 | }; |
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| 27 | |
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| 28 | template <int A> struct S4 { |
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| 29 | template <int B> void foo() { |
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| 30 | (void)(A == A); // expected-warning {{self-comparison always evaluates to true}} |
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| 31 | (void)(A == B); |
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| 32 | } |
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| 33 | }; |
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| 34 | |
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| 35 | const int N = 42; |
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| 36 | template <int X> void foo2() { |
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| 37 | (void)(X == N); |
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| 38 | (void)(N == X); |
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| 39 | } |
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| 40 | |
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| 41 | void test() { |
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| 42 | foo<1, 1>(); |
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| 43 | S1<1, 1> s1; s1.foo(); |
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| 44 | S2<1, 1> s2; s2.foo<void>(); |
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| 45 | S3 s3; s3.foo<1, 1>(); |
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| 46 | S4<1> s4; s4.foo<1>(); |
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| 47 | foo2<N>(); |
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| 48 | } |
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| 49 | |
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