unused-expr-system-header.h revision d87a0cd2b3e1c9e9f01212875f4cbe5b7bb7ab57 
1// "System header" for testing that -Wunused-value is properly suppressed in
2// certain cases.
3
4#define POSSIBLY_BAD_MACRO(x) \
5  { int i = x; \
6    i; }
7
8#define STATEMENT_EXPR_MACRO(x) \
9  (__extension__ \
10   ({int i = x; \
11     i;}))
12
13#define COMMA_MACRO_1(x, y) \
14  {x, y;}
15
16#define COMMA_MACRO_2(x, y) \
17  if (x) { 1 == 2, y; }
18
19#define COMMA_MACRO_3(x, y) \
20  (x, y)
21
22#define COMMA_MACRO_4(x, y) \
23  ( 1 == 2, y )
24