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