binutils-gdb/gdb/testsuite/gdb.cp/anon-union.cc

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struct Foo {
union {
int zero;
unsigned int one;
} num1;
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struct X {
int rock;
unsigned int rock2;
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};
union {
int pebble;
X x;
union {
int qux;
unsigned int mux;
};
unsigned int boulder;
};
union {
int paper;
unsigned int cloth;
};
union {
int two;
unsigned int three;
} num2;
};
union Bar {
int x;
unsigned int y;
};
int main()
{
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Foo foo = {0, 0};
foo.paper = 33;
foo.pebble = 44;
foo.mux = 55;
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Bar bar = {0};
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union {
int z;
unsigned int w;
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}; w = 0;
bar.x = 33;
w = 45;
int j = 0;
}