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236
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1 // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify=expected,ext -Wundef
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2 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify=expected,ext -Wundef
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3 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -std=c++2b -pedantic -ftrigraphs -verify=expected,cxx2b -Wundef -Wpre-c++2b-compat
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4 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify=expected,ext -Wundef -ftrigraphs -DTRIGRAPHS=1
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150
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5 // RUN: not %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -Wundef 2>&1 | FileCheck -strict-whitespace %s
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6
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7 #define \u00FC
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8 #define a\u00FD() 0
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9 #ifndef \u00FC
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10 #error "This should never happen"
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11 #endif
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12
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13 #if a\u00FD()
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14 #error "This should never happen"
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15 #endif
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16
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17 #if a\U000000FD()
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18 #error "This should never happen"
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19 #endif
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20
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236
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21 #if a\u{FD}() // ext-warning {{extension}} cxx2b-warning {{before C++2b}}
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22 #error "This should never happen"
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23 #endif
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24
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150
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25 #if \uarecool // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}}
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26 #endif
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27 #if \uwerecool // expected-warning{{\u used with no following hex digits; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}}
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28 #endif
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29 #if \U0001000 // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}}
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30 #endif
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31
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32 // Make sure we reject disallowed UCNs
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33 #define \ufffe // expected-error {{macro name must be an identifier}}
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236
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34 #define \U10000000 // expected-error {{macro name must be an identifier}}
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35 #define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro name must be an identifier}}
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36 #define \u{fffe} // expected-error {{macro name must be an identifier}} \
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37 // ext-warning {{extension}} cxx2b-warning {{before C++2b}}
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38 #define \N{ALERT} // expected-error {{universal character name refers to a control character}} \
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39 // expected-error {{macro name must be an identifier}} \
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40 // ext-warning {{extension}} cxx2b-warning {{before C++2b}}
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41 #define \N{WASTEBASKET} // expected-error {{macro name must be an identifier}} \
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42 // ext-warning {{extension}} cxx2b-warning {{before C++2b}}
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150
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43
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44 #define a\u0024
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45
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46 #if \u0110 // expected-warning {{is not defined, evaluates to 0}}
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47 #endif
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48
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49
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50 #define \u0110 1 / 0
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51 #if \u0110 // expected-error {{division by zero in preprocessor expression}}
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52 #endif
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53
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54 #define STRINGIZE(X) # X
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55
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56 extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1];
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57
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58 // Check that we still diagnose disallowed UCNs in #if 0 blocks.
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59 // C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are
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60 // formed before directives are parsed.
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61 // expected-error@+4 {{character 'a' cannot be specified by a universal character name}}
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62 #if 0
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63 #define \ufffe // okay
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64 #define \U10000000 // okay
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65 #define \u0061 // error, but -verify only looks at comments outside #if 0
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66 #endif
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67
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68
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69 // A UCN formed by token pasting is undefined in both C99 and C++.
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70 // Right now we don't do anything special, which causes us to coincidentally
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71 // accept the first case below but reject the second two.
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72 #define PASTE(A, B) A ## B
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73 extern int PASTE(\, u00FD);
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74 extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}}
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75 extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}}
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76 #ifdef __cplusplus
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77 // expected-error@-3 {{expected unqualified-id}}
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78 // expected-error@-3 {{expected unqualified-id}}
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79 #else
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80 // expected-error@-6 {{expected identifier}}
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81 // expected-error@-6 {{expected identifier}}
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82 #endif
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83
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84
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85 // A UCN produced by line splicing is valid in C99 but undefined in C++.
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86 // Since undefined behavior can do anything including working as intended,
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87 // we just accept it in C++ as well.;
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88 #define newline_1_\u00F\
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89 C 1
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90 #define newline_2_\u00\
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91 F\
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92 C 1
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93 #define newline_3_\u\
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94 00\
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95 FC 1
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96 #define newline_4_\\
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97 u00FC 1
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98 #define newline_5_\\
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99 u\
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100 \
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101 0\
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102 0\
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103 F\
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104 C 1
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105
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106 #if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \
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107 newline_4_\u00FC && newline_5_\u00FC)
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108 #else
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109 #error "Line splicing failed to produce UCNs"
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110 #endif
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111
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112
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113 #define capital_u_\U00FC
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114 // expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}}
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115 // CHECK: note: did you mean to use '\u'?
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116 // CHECK-NEXT: #define capital_u_\U00FC
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117 // CHECK-NEXT: {{^ \^}}
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118 // CHECK-NEXT: {{^ u}}
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236
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119
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120 #define \u{} // expected-warning {{empty delimited universal character name; treating as '\' 'u' '{' '}'}} expected-error {{macro name must be an identifier}}
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121 #define \u{123456789} // expected-error {{hex escape sequence out of range}} expected-error {{macro name must be an identifier}}
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122 #define \u{ // expected-warning {{incomplete delimited universal character name; treating as '\' 'u' '{' identifier}} expected-error {{macro name must be an identifier}}
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123 #define \u{fgh} // expected-warning {{incomplete delimited universal character name; treating as '\' 'u' '{' identifier}} expected-error {{macro name must be an identifier}}
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124 #define \N{ // expected-warning {{incomplete delimited universal character name; treating as '\' 'N' '{' identifier}} expected-error {{macro name must be an identifier}}
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125 #define \N{} // expected-warning {{empty delimited universal character name; treating as '\' 'N' '{' '}'}} expected-error {{macro name must be an identifier}}
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126 #define \N{NOTATHING} // expected-error {{'NOTATHING' is not a valid Unicode character name}} \
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127 // expected-error {{macro name must be an identifier}}
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128 #define \NN // expected-warning {{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{macro name must be an identifier}}
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129 #define \N{GREEK_SMALL-LETTERALPHA} // expected-error {{'GREEK_SMALL-LETTERALPHA' is not a valid Unicode character name}} \
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130 // expected-note {{characters names in Unicode escape sequences are sensitive to case and whitespaces}}
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131
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132 #define CONCAT(A, B) A##B
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133 int CONCAT(\N{GREEK, CAPITALLETTERALPHA}); // expected-error{{expected}} \
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134 // expected-warning {{incomplete delimited universal character name}}
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135
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136 #ifdef TRIGRAPHS
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137 int \N??<GREEK CAPITAL LETTER ALPHA??> = 0; // expected-warning{{extension}} cxx2b-warning {{before C++2b}} \
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138 // expected-warning 2{{trigraph converted}}
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139
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140 #endif
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