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AaronBallmanAaronBallman
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[C99] Claim conformance to WG14 N590 (#86985)
This adds test coverage for implementation limits that were defined in WG14 N590. The original content of that paper is not available, so this actually tests against the limits as of C23.
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‎clang/test/C/C99/Inputs/nested-include.h

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#if __COUNTER__ < 15
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#include __FILE__
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#endif

‎clang/test/C/C99/n590.c

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// RUN: %clang_cc1 -verify -Wno-unused -I %S/Inputs %s
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/* WG14 N590: Clang 3.2
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* Increase minimum translation limits
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*
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* NB: the content of this document is not available, so this is testing
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* against the implementation limits in C23, which are the most aggressive
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* translation limits we can test against.
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*/
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// expected-no-diagnostics
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// 15 nesting levels for #included files
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// NOTE: this relies on the value of __COUNTER__, so be very careful about
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// adding code above this line of the test.
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#include "nested-include.h"
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// Helpers for declaring unique variables.
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#define CAT_IMPL(x, y) x ## y
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#define CAT(x, y) CAT_IMPL(x, y)
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#define ONCE(x) CAT(x, __COUNTER__) SEPARATOR
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#define REPEAT10(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x)
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#define REPEAT63(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x)
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#define REPEAT100(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x) REPEAT10(x)
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#define REPEAT127(x) REPEAT100(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x) ONCE(x)
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#define REPEAT500(x) REPEAT100(x) REPEAT100(x) REPEAT100(x) REPEAT100(x) REPEAT100(x)
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#define REPEAT1000(x) REPEAT500(x) REPEAT500(x)
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#define REPEAT1023(x) REPEAT1000(x) REPEAT10(x) REPEAT10(x) ONCE(x) ONCE(x) ONCE(x)
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#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)
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// Limits taken from C23 5.2.5.2p1.
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void func(void) {
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// 127 nesting levels of blocks
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{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{
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}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
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// 12 pointer, array, and function declarators (in any combination) modifying
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// an arithmetic, structure, union, or void type in a declaration.
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void (************fp)(int foo[1][2][3][4][5][6][7][8][9][10][11][12]);
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// 63 nesting levels of parenthesized declarators within a full declarator.
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int (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((decl)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))));
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// 63 significant initial characters in an internal identifier or a macro
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// name.
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static int aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeffffffffffggg;
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// 31 significant initial characters in an external identifier.
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extern int gggggggggghhhhhhhhhhiiiiiiiiiijjjjjjjjjjkkkkkkkkkkllllllllllmmm;
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// 511 identifiers with block scope declared in one block.
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{
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#define SEPARATOR ;
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REPEAT500(int a)
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REPEAT10(int a)
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ONCE(int a)
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#undef SEPARATOR
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}
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// 4095 characters in a logical source line.
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(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+
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// 4095 characters in a string literal (after concatenation)
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(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 :
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REPEAT1023(case 0x)
175+
#undef SEPARATOR
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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 ;
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REPEAT1023(int mem)
190+
#undef SEPARATOR
191+
};
192+
193+
// 1023 enumeration constants in a single enumeration
194+
enum E {
195+
#define SEPARATOR ,
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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.
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+
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// 63 levels of nested structure or union definitions in a single member
211+
// declaration list.
212+
struct U {
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#define SEPARATOR ;
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REPEAT63(struct { int a)
215+
REPEAT63(} mem)
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#undef SEPARATOR
217+
};
218+
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// 63 nesting levels of conditional inclusion
220+
#if 1
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#if 1
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#if 1
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#if 1
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#if 1
225+
#if 1
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#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+
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#endif
285+
#endif
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#endif
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#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
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
320+
#endif
321+
#endif
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#endif
323+
#endif
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#endif
325+
#endif
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#endif
327+
#endif
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#endif
329+
#endif
330+
#endif
331+
#endif
332+
#endif
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#endif
334+
#endif
335+
#endif
336+
#endif
337+
#endif
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#endif
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#endif
340+
#endif
341+
#endif
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#endif
343+
#endif
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#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

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