1d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith// RUN: %clang_cc1 -std=c++11 -verify %s 2d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith 39fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smithusing size_t = decltype(sizeof(int)); 49fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smithconstexpr const char *operator "" _id(const char *p, size_t) { return p; } 5d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smithconstexpr const char *s = "foo"_id "bar" "baz"_id "quux"; 6d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith 7d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smithconstexpr bool streq(const char *p, const char *q) { 8d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith return *p == *q && (!*p || streq(p+1, q+1)); 9d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith} 10d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smithstatic_assert(streq(s, "foobarbazquux"), ""); 11d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith 129fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smithconstexpr const char *operator "" _trim(const char *p, size_t n) { 139fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smith return *p == ' ' ? operator "" _trim(p + 1, n - 1) : p; 14d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith} 15d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smithconstexpr const char *t = " " " "_trim " foo"; 169fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smithstatic_assert(streq(t, "foo"), ""); 17d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smith 18d4f9f9dfdfa36f2e45c2ad0f4be304737d0f7f64Richard Smithconst char *u = "foo" "bar"_id "baz" "quux"_di "corge"; // expected-error {{differing user-defined suffixes ('_id' and '_di') in string literal concatenation}} 19