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