xref: /llvm-project/clang/test/C/C99/n590.c (revision 8ee5a3fd1cf54cbbcb9c66d8a99976cfdc4fc56f) 
1 // RUN: %clang_cc1 -verify -Wno-unused -I %S/Inputs %s
2 
3 /* WG14 N590: Clang 3.2
4  * Increase minimum translation limits
5  *
6  * NB: the content of this document is not available, so this is testing
7  * against the implementation limits in C23, which are the most aggressive
8  * translation limits we can test against.
9  */
10 // expected-no-diagnostics
11 
12 // 15 nesting levels for #included files
13 // NOTE: this relies on the value of __COUNTER__, so be very careful about
14 // adding code above this line of the test.
15 #include "nested-include.h"
16 
17 // Helpers for declaring unique variables.
18 #define CAT_IMPL(x, y) x ## y
19 #define CAT(x, y) CAT_IMPL(x, y)
20 #define ONCE(x) CAT(x, __COUNTER__) SEPARATOR
21 #define REPEAT10(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x)
22 #define REPEAT63(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x)
23 #define REPEAT100(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x)
24 #define REPEAT127(x) REPEAT100(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x)
25 #define REPEAT500(x) REPEAT100(x) REPEAT100(x) REPEAT100(x) REPEAT100(x) REPEAT100(x)
26 #define REPEAT1000(x) REPEAT500(x) REPEAT500(x)
27 #define REPEAT1023(x) REPEAT1000(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x)
28 #define REPEAT4095(x) REPEAT1000(x) REPEAT1000(x) REPEAT1000(x) REPEAT1000(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x)
29 
30 // Limits taken from C23 5.2.5.2p1.
func(void)31 void func(void) {
32   // 127 nesting levels of blocks
33   {{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{
34   }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
35 
36   // 12 pointer, array, and function declarators (in any combination) modifying
37   // an arithmetic, structure, union, or void type in a declaration.
38   void (************fp)(int foo[1][2][3][4][5][6][7][8][9][10][11][12]);
39 
40   // 63 nesting levels of parenthesized declarators within a full declarator.
41   int (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((decl)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))));
42 
43   // 63 significant initial characters in an internal identifier or a macro
44   // name.
45   static int aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeffffffffffggg;
46 
47   // 31 significant initial characters in an external identifier.
48   extern int gggggggggghhhhhhhhhhiiiiiiiiiijjjjjjjjjjkkkkkkkkkkllllllllllmmm;
49 
50   // 511 identifiers with block scope declared in one block.
51   {
52 	#define SEPARATOR ;
53     REPEAT500(int a)
54     REPEAT10(int a)
55     ONCE(int a)
56     #undef SEPARATOR
57   }
58 
59   // 4095 characters in a logical source line.
60   (void)0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
61   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
62   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
63   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
64   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
65   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
66   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
67   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
68   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
69   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
70   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
71   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
72   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
73   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
74   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
75   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
76   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
77   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
78   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
79   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
80   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
81   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
82   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
83   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
84   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
85   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
86   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
87   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
88   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
89   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
90   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
91   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
92   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
93   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
94   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
95   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
96   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
97   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
98   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
99   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
100   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
101   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
102   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
103   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
104   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
105   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
106   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
107   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
108   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
109   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
110   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
111   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
112   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
113   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4;
114 
115   // 4095 characters in a string literal (after concatenation)
116   (void)"0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
117   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
118   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
119   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
120   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
121   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
122   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
123   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
124   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
125   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
126   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
127   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
128   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
129   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
130   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
131   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
132   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
133   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
134   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
135   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
136   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
137   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
138   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
139   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
140   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
141   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
142   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
143   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
144   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
145   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
146   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
147   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
148   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
149   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
150   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
151   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
152   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
153   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
154   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
155   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
156   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
157   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
158   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
159   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
160   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
161   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
162   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
163   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
164   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,\
165   9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,\
166   7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,\
167   5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,\
168   3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,\
169   1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4";
170 
171   // 1023 case labels for a switch statement.
172   switch (aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeffffffffffggg) {
173   #define SEPARATOR :
174   REPEAT1023(case 0x)
175   #undef SEPARATOR
176     break;
177   }
178 }
179 
180 // 32767 bytes in an object.
181 struct S {
182   unsigned char mem[32767];
183 };
184 _Static_assert(sizeof(struct S) >= 32767, "");
185 
186 // 1023 members in a single structure or union
187 struct T {
188 #define SEPARATOR ;
189   REPEAT1023(int mem)
190 #undef SEPARATOR
191 };
192 
193 // 1023 enumeration constants in a single enumeration
194 enum E {
195 #define SEPARATOR ,
196 REPEAT1023(e)
197 #undef SEPARATOR
198 };
199 
200 // 127 parameters in one function definition.
201 #define SEPARATOR ,
202 // Because the parameters are all separated by commas, we have to add a final
203 // parameter (without a preceeding comma) to form a valid declaration.
lots_of_params(REPEAT127 (int a)int last)204 void lots_of_params(REPEAT127(int a) int last) {
205   // 127 arguments in one function call
206   lots_of_params(REPEAT127(0x0) 0);
207 }
208 #undef SEPARATOR
209 
210 // 63 levels of nested structure or union definitions in a single member
211 // declaration list.
212 struct U {
213 #define SEPARATOR ;
214 REPEAT63(struct { int a)
215 REPEAT63(} mem)
216 #undef SEPARATOR
217 };
218 
219 // 63 nesting levels of conditional inclusion
220 #if 1
221 #if 1
222 #if 1
223 #if 1
224 #if 1
225 #if 1
226 #if 1
227 #if 1
228 #if 1
229 #if 1
230 #if 1
231 #if 1
232 #if 1
233 #if 1
234 #if 1
235 #if 1
236 #if 1
237 #if 1
238 #if 1
239 #if 1
240 #if 1
241 #if 1
242 #if 1
243 #if 1
244 #if 1
245 #if 1
246 #if 1
247 #if 1
248 #if 1
249 #if 1
250 #if 1
251 #if 1
252 #if 1
253 #if 1
254 #if 1
255 #if 1
256 #if 1
257 #if 1
258 #if 1
259 #if 1
260 #if 1
261 #if 1
262 #if 1
263 #if 1
264 #if 1
265 #if 1
266 #if 1
267 #if 1
268 #if 1
269 #if 1
270 #if 1
271 #if 1
272 #if 1
273 #if 1
274 #if 1
275 #if 1
276 #if 1
277 #if 1
278 #if 1
279 #if 1
280 #if 1
281 #if 1
282 #if 1
283 
284 #endif
285 #endif
286 #endif
287 #endif
288 #endif
289 #endif
290 #endif
291 #endif
292 #endif
293 #endif
294 #endif
295 #endif
296 #endif
297 #endif
298 #endif
299 #endif
300 #endif
301 #endif
302 #endif
303 #endif
304 #endif
305 #endif
306 #endif
307 #endif
308 #endif
309 #endif
310 #endif
311 #endif
312 #endif
313 #endif
314 #endif
315 #endif
316 #endif
317 #endif
318 #endif
319 #endif
320 #endif
321 #endif
322 #endif
323 #endif
324 #endif
325 #endif
326 #endif
327 #endif
328 #endif
329 #endif
330 #endif
331 #endif
332 #endif
333 #endif
334 #endif
335 #endif
336 #endif
337 #endif
338 #endif
339 #endif
340 #endif
341 #endif
342 #endif
343 #endif
344 #endif
345 #endif
346 #endif
347 
348 // 63 initial characters in a macro name.
349 #define AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEFFFFFFFFFFGGG
350 
351 // 4095 external identifiers in one translation unit.
352 #define SEPARATOR ;
353 REPEAT4095(extern int val)
354 #undef SEPARATOR
355 
356 // 127 parameters in one macro definition
357 #define BIG_UN(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
358                a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, \
359                a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, \
360                a30, a31, a32, a33, a34, a35, a36, a37, a38, a39, \
361                a40, a41, a42, a43, a44, a45, a46, a47, a48, a49, \
362                a50, a51, a52, a53, a54, a55, a56, a57, a58, a59, \
363                a60, a61, a62, a63, a64, a65, a66, a67, a68, a69, \
364                a70, a71, a72, a73, a74, a75, a76, a77, a78, a79, \
365                a80, a81, a82, a83, a84, a85, a86, a87, a88, a89, \
366                a90, a91, a92, a93, a94, a95, a96, a97, a98, a99, \
367                a100, a101, a102, a103, a104, a105, a106, a107, a108, a109, \
368                a110, a111, a112, a113, a114, a115, a116, a117, a118, a119, \
369                a120, a121, a122, a123, a124, a125, a126) 0
370 
371 // 127 arguments in one macro invocation
372 int val = BIG_UN(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, \
373                  10, 11, 12, 13, 14, 15, 16, 17, 18, 19, \
374                  20, 21, 22, 23, 24, 25, 26, 27, 28, 29, \
375                  30, 31, 32, 33, 34, 35, 36, 37, 38, 39, \
376                  40, 41, 42, 43, 44, 45, 46, 47, 48, 49, \
377                  50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
378                  60, 61, 62, 63, 64, 65, 66, 67, 68, 69, \
379                  70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
380                  80, 81, 82, 83, 84, 85, 86, 87, 88, 89, \
381                  90, 91, 92, 93, 94, 95, 96, 97, 98, 99, \
382                  100, 101, 102, 103, 104, 105, 106, 107, 108, 109, \
383                  110, 111, 112, 113, 114, 115, 116, 117, 118, 119, \
384                  120, 121, 122, 123, 124, 125, 126);
385 
386 // 4095 macro identifiers simultaneously defined in one preprocessing
387 // translation unit. Rather than write out 4095 macro definitions, we'll use a
388 // cheap python script to generate the contents and test that.
389 // RUN: %python -c "print('\n'.join(['// expected-no-diagnostics'] + [f'#define M{i}\n' for i in range(4096)]))" >%t.inc
390 // RUN: %clang_cc1 -verify %t.inc
391