1*67e74705SXin Li // RUN: %clang_cc1 %s -std=c++11 -fsyntax-only -verify -pedantic 2*67e74705SXin Li 3*67e74705SXin Li # 1 "/usr/include/string.h" 1 3 4 4*67e74705SXin Li extern "C" { 5*67e74705SXin Li typedef decltype(sizeof(int)) size_t; 6*67e74705SXin Li extern size_t strlen(const char *p); 7*67e74705SXin Li } 8*67e74705SXin Li 9*67e74705SXin Li # 10 "SemaCXX/constexpr-strlen.cpp" 2 10*67e74705SXin Li constexpr int n = __builtin_strlen("hello"); // ok 11*67e74705SXin Li constexpr int m = strlen("hello"); // expected-error {{constant expression}} expected-note {{non-constexpr function 'strlen' cannot be used in a constant expression}} 12*67e74705SXin Li 13*67e74705SXin Li // Make sure we can evaluate a call to strlen. 14*67e74705SXin Li int arr[3]; // expected-note {{here}} 15*67e74705SXin Li int k = arr[strlen("hello")]; // expected-warning {{array index 5}} 16