1// RUN: %clang_cc1 -std=c++11 -verify %s -fms-extensions -triple x86_64-apple-darwin9.0.0
2
3// A ud-suffix cannot be used on string literals in a whole bunch of contexts:
4
5#include "foo"_bar // expected-error {{expected "FILENAME" or <FILENAME>}}
6#line 1 "foo"_bar // expected-error {{user-defined suffix cannot be used here}}
7# 1 "foo"_bar 1 // expected-error {{user-defined suffix cannot be used here}}
8#ident "foo"_bar // expected-error {{user-defined suffix cannot be used here}}
9_Pragma("foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
10#pragma comment(lib, "foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
11_Pragma("comment(lib, \"foo\"_bar)") // expected-error {{user-defined suffix cannot be used here}}
12#pragma message "hi"_there // expected-error {{user-defined suffix cannot be used here}} expected-warning {{hi}}
13#pragma push_macro("foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
14#if __has_warning("-Wan-island-to-discover"_bar) // expected-error {{user-defined suffix cannot be used here}}
15#elif __has_include("foo"_bar) // expected-error {{expected "FILENAME" or <FILENAME>}}
16#endif
17
18extern "C++"_x {} // expected-error {{user-defined suffix cannot be used here}} expected-error {{unknown linkage language}}
19
20int f() {
21  asm("mov %eax, %rdx"_foo); // expected-error {{user-defined suffix cannot be used here}}
22}
23
24static_assert(true, "foo"_bar); // expected-error {{user-defined suffix cannot be used here}}
25
26int cake() __attribute__((availability(macosx, unavailable, message = "is a lie"_x))); // expected-error {{user-defined suffix cannot be used here}}
27
28// A ud-suffix cannot be used on character literals in preprocessor constant
29// expressions:
30#if 'x'_y - u'x'_z // expected-error 2{{character literal with user-defined suffix cannot be used in preprocessor constant expression}}
31#error error
32#endif
33
34// A ud-suffix cannot be used on integer literals in preprocessor constant
35// expressions:
36#if 0_foo // expected-error {{integer literal with user-defined suffix cannot be used in preprocessor constant expression}}
37#error error
38#endif
39
40// But they can appear in expressions.
41constexpr char operator"" _id(char c) { return c; }
42constexpr wchar_t operator"" _id(wchar_t c) { return c; }
43constexpr char16_t operator"" _id(char16_t c) { return c; }
44constexpr char32_t operator"" _id(char32_t c) { return c; }
45
46using size_t = decltype(sizeof(int));
47constexpr const char operator"" _id(const char *p, size_t n) { return *p; }
48constexpr const wchar_t operator"" _id(const wchar_t *p, size_t n) { return *p; }
49constexpr const char16_t operator"" _id(const char16_t *p, size_t n) { return *p; }
50constexpr const char32_t operator"" _id(const char32_t *p, size_t n) { return *p; }
51
52constexpr unsigned long long operator"" _id(unsigned long long n) { return n; }
53constexpr long double operator"" _id(long double d) { return d; }
54
55template<int n> struct S {};
56S<"a"_id> sa;
57S<L"b"_id> sb;
58S<u8"c"_id> sc;
59S<u"d"_id> sd;
60S<U"e"_id> se;
61
62S<'w'_id> sw;
63S<L'x'_id> sx;
64S<u'y'_id> sy;
65S<U'z'_id> sz;
66
67S<100_id> sn;
68S<(int)1.3_id> sf;
69
70void h() {
71  (void)"test"_id "test" L"test";
72}
73
74// Test source location for suffix is known
75const char *p =
76  "foo\nbar" R"x(
77  erk
78  flux
79  )x" "eep\x1f"\
80_no_such_suffix // expected-error {{'operator "" _no_such_suffix'}}
81"and a bit more"
82"and another suffix"_no_such_suffix;
83
84char c =
85  '\x14'\
86_no_such_suffix; // expected-error {{'operator "" _no_such_suffix'}}
87
88int &r =
891234567\
90_no_such_suffix; // expected-error {{'operator "" _no_such_suffix'}}
91
92int k =
931234567.89\
94_no_such_suffix; // expected-error {{'operator "" _no_such_suffix'}}
95
96// Make sure we handle more interesting ways of writing a string literal which
97// is "" in translation phase 7.
98void operator "\
99" _foo(unsigned long long); // ok
100
101void operator R"xyzzy()xyzzy" _foo(long double); // ok
102
103void operator"" "" R"()" "" _foo(const char *); // ok
104
105// Ensure we diagnose the bad cases.
106void operator "\0" _non_empty(const char *); // expected-error {{must be '""'}}
107void operator ""_no_space(const char *); // expected-error {{C++11 requires a space}}
108void operator L"" _not_char(const char *); // expected-error {{cannot have an encoding prefix}}
109void operator "" ""
110U"" // expected-error {{cannot have an encoding prefix}}
111"" _also_not_char(const char *);
112void operator "" u8"" "\u0123" "hello"_all_of_the_things ""(const char*); // expected-error {{must be '""'}}
113