140b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith// RUN: %clang_cc1 %s -std=c++11 -fsyntax-only -verify -pedantic 240b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith 340b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith# 1 "/usr/include/string.h" 1 3 4 440b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smithextern "C" { 540b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith typedef decltype(sizeof(int)) size_t; 640b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith extern size_t strlen(const char *p); 740b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith} 840b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith 940b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith# 10 "SemaCXX/constexpr-strlen.cpp" 2 1040b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smithconstexpr int n = __builtin_strlen("hello"); // ok 1140b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smithconstexpr int m = strlen("hello"); // expected-error {{constant expression}} expected-note {{non-constexpr function 'strlen' cannot be used in a constant expression}} 1240b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith 1340b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smith// Make sure we can evaluate a call to strlen. 1440b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smithint arr[3]; // expected-note {{here}} 1540b993a826728214c869ee4fbc9d296a2e1e1f71Richard Smithint k = arr[strlen("hello")]; // expected-warning {{array index 5}} 16