1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
// RUN: %clang_cc1 -E %s -pedantic -std=c++2a | FileCheck -strict-whitespace %s
#define LPAREN (
#define RPAREN )
#define A0 expandedA0
#define A1 expandedA1 A0
#define A2 expandedA2 A1
#define A3 expandedA3 A2
#define A() B LPAREN )
#define B() C LPAREN )
#define C() D LPAREN )
#define F(x, y) x + y
#define ELLIP_FUNC(...) __VA_OPT__(__VA_ARGS__)
1: ELLIP_FUNC(F, LPAREN, 'a', 'b', RPAREN);
2: ELLIP_FUNC(F LPAREN 'a', 'b' RPAREN);
#undef F
#undef ELLIP_FUNC
// CHECK: 1: F, (, 'a', 'b', );
// CHECK: 2: 'a' + 'b';
#define F(...) f(0 __VA_OPT__(,) __VA_ARGS__)
3: F(a, b, c) // replaced by f(0, a, b, c)
4: F() // replaced by f(0)
// CHECK: 3: f(0 , a, b, c)
// CHECK: 4: f(0 )
#undef F
#define G(X, ...) f(0, X __VA_OPT__(,) __VA_ARGS__)
5: G(a, b, c) // replaced by f(0, a , b, c)
6: G(a) // replaced by f(0, a)
7: G(a,) // replaced by f(0, a)
7.1: G(a,,)
// CHECK: 5: f(0, a , b, c)
// CHECK: 6: f(0, a )
// CHECK: 7: f(0, a )
// CHECK: 7.1: f(0, a , ,)
#undef G
#define HT_B() TONG
#define F(x, ...) HT_ ## __VA_OPT__(x x A() #x)
8: F(1)
9: F(A(),1)
// CHECK: 8: HT_
// CHECK: 9: TONG C ( ) B ( ) "A()"
#undef HT_B
#undef F
#define F(a,...) #__VA_OPT__(A1 a)
10: F(A())
11: F(A1 A(), 1)
// CHECK: 10: ""
// CHECK: 11: "A1 expandedA1 expandedA0 B ( )"
#undef F
#define F(a,...) a ## __VA_OPT__(A1 a) ## __VA_ARGS__ ## a
12.0: F()
12: F(,)
13: F(B,)
// CHECK: 12.0:
// CHECK: 12:
// CHECK: 13: BB
#undef F
#define F(...) #__VA_OPT__() X ## __VA_OPT__() #__VA_OPT__( )
14: F()
15: F(1)
// CHECK: 14: "" X ""
// CHECK: 15: "" X ""
#undef F
#define SDEF(sname, ...) S sname __VA_OPT__(= { __VA_ARGS__ })
16: SDEF(foo); // replaced by S foo;
17: SDEF(bar, 1, 2); // replaced by S bar = { 1, 2 };
// CHECK: 16: S foo ;
// CHECK: 17: S bar = { 1, 2 };
#undef SDEF
#define F(a,...) A() #__VA_OPT__(A3 __VA_ARGS__ a ## __VA_ARGS__ ## a ## C A3) A()
18: F()
19: F(,)
20: F(,A3)
21: F(A3, A(),A0)
// CHECK: 18: B ( ) "" B ( )
// CHECK: 19: B ( ) "" B ( )
// CHECK: 20: B ( ) "A3 expandedA3 expandedA2 expandedA1 expandedA0 A3C A3" B ( )
// CHECK: 21: B ( ) "A3 B ( ),expandedA0 A3A(),A0A3C A3" B ( )
#undef F
#define F(a,...) A() #__VA_OPT__(A3 __VA_ARGS__ a ## __VA_ARGS__ ## a ## C A3) a __VA_OPT__(A0 __VA_ARGS__ a ## __VA_ARGS__ ## a ## C A0) A()
22: F()
23: F(,)
24: F(,A0)
25: F(A0, A(),A0)
// CHECK: 22: B ( ) "" B ( )
// CHECK: 23: B ( ) "" B ( )
// CHECK: 24: B ( ) "A3 expandedA0 A0C A3" expandedA0 expandedA0 A0C expandedA0 B ( )
// CHECK: 25: B ( ) "A3 B ( ),expandedA0 A0A(),A0A0C A3" expandedA0 expandedA0 C ( ),expandedA0 A0A(),A0A0C expandedA0 B ( )
#undef F
#define F(a,...) __VA_OPT__(B a ## a) ## 1
#define G(a,...) __VA_OPT__(B a) ## 1
26: F(,1)
26_1: G(,1)
// CHECK: 26: B 1
// CHECK: 26_1: B 1
#undef F
#undef G
#define F(a,...) B ## __VA_OPT__(a 1) ## 1
#define G(a,...) B ## __VA_OPT__(a ## a 1) ## 1
27: F(,1)
27_1: F(A0,1)
28: G(,1)
// CHECK: 27: B 11
// CHECK: 27_1: BexpandedA0 11
// CHECK: 28: B 11
#undef F
#undef G
|
