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