warn-dangling-else.cpp source code [clang_source_code/test/Parser/warn-dangling-else.cpp]

1	// RUN: %clang_cc1 -fsyntax-only -verify -Wdangling-else %s
2
3	void f(int a, int b, int c, int d, int e) {
4
5	// should warn
6	{ if (a) if (b) d++; else e++; } // expected-warning {{add explicit braces to avoid dangling else}}
7	{ if (a) while (b) if (c) d++; else e++; } // expected-warning {{add explicit braces to avoid dangling else}}
8	{ if (a) switch (b) if (c) d++; else e++; } // expected-warning {{add explicit braces to avoid dangling else}}
9	{ if (a) for (;;) if (c) d++; else e++; } // expected-warning {{add explicit braces to avoid dangling else}}
10	{ if (a) if (b) if (d) d++; else e++; else d--; } // expected-warning {{add explicit braces to avoid dangling else}}
11
12	if (a)
13	if (b) {
14	d++;
15	} else e++; // expected-warning {{add explicit braces to avoid dangling else}}
16
17	// shouldn't
18	{ if (a) if (b) d++; }
19	{ if (a) if (b) if (c) d++; }
20	{ if (a) if (b) d++; else e++; else d--; }
21	{ if (a) if (b) if (d) d++; else e++; else d--; else e--; }
22	{ if (a) do if (b) d++; else e++; while (c); }
23
24	if (a) {
25	if (b) d++;
26	else e++;
27	}
28
29	if (a) {
30	if (b) d++;
31	} else e++;
32	}
33
34	// Somewhat more elaborate case that shouldn't warn.
35	class A {
36	public:
37	void operator<<(const char* s) {}
38	};
39
40	void HandleDisabledThing() {}
41	A GetThing() { return A(); }
42
43	#define FOO(X) \
44	switch (0) default: \
45	if (!(X)) \
46	HandleDisabledThing(); \
47	else \
48	GetThing()
49
50	void f(bool cond) {
51	int x = 0;
52	if (cond)
53	FOO(x) << "hello"; // no warning
54	}
55
56

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