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cat <<'EOF' > expected
foobar=100
prefix_test=200
test_suffix=300
var_1=10
var_2=20
var_A=30
number_12=12
EOF
test_diff <<'EOF'
int printf();
#define CONCAT(a, b) a##b
#define PREFIX(name) prefix_##name
#define SUFFIX(name) name##_suffix
int CONCAT(foo, bar) = 100;
int PREFIX(test) = 200;
int SUFFIX(test) = 300;
#define MAKE_VAR(n) var_##n
int MAKE_VAR(1) = 10;
int MAKE_VAR(2) = 20;
#define A 0
int MAKE_VAR(A) = 30;
#define NUMBER(x, y) number_##x##y
int NUMBER(1, 2) = 12;
int main() {
printf("foobar=%d\n", foobar);
printf("prefix_test=%d\n", prefix_test);
printf("test_suffix=%d\n", test_suffix);
printf("var_1=%d\n", var_1);
printf("var_2=%d\n", var_2);
printf("var_A=%d\n", var_A);
printf("number_12=%d\n", number_12);
return 0;
}
EOF
cat <<'EOF' > expected
123
EOF
test_diff <<'EOF'
int printf(const char*, ...);
#define F(x) CHECK(G(x))
#define G(x) CHECK(H(x))
#define CHECK(x) x
int H(int n) { return n; }
int main() {
printf("%d\n", F(123));
}
EOF
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