1 // RUN: %clang_cc1 -std=c++11 -verify %s 2 3 using size_t = decltype(sizeof(int)); 4 constexpr const char *operator "" _id(const char *p, size_t) { return p; } 5 constexpr const char *s = "foo"_id "bar" "baz"_id "quux"; 6 7 constexpr bool streq(const char *p, const char *q) { 8 return *p == *q && (!*p || streq(p+1, q+1)); 9 } 10 static_assert(streq(s, "foobarbazquux"), ""); 11 12 constexpr const char *operator "" _trim(const char *p, size_t n) { 13 return *p == ' ' ? operator "" _trim(p + 1, n - 1) : p; 14 } 15 constexpr const char *t = " " " "_trim " foo"; 16 static_assert(streq(t, "foo"), ""); 17 18 const char *u = "foo" "bar"_id "baz" "quux"_di "corge"; // expected-error {{differing user-defined suffixes ('_id' and '_di') in string literal concatenation}} 19
