53 lines
2.2 KiB
C++
53 lines
2.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wformat -verify %s -Wno-error=non-pod-varargs
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#include <stdarg.h>
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extern "C" {
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extern int printf(const char *restrict, ...);
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extern int sprintf(char *, const char *restrict, ...);
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}
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class HasCStr {
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const char *str;
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public:
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HasCStr(const char *s): str(s) { }
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const char *c_str() {return str;}
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};
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class HasNoCStr {
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const char *str;
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public:
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HasNoCStr(const char *s): str(s) { }
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const char *not_c_str() {return str;}
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};
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extern const char extstr[16];
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void pod_test() {
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char str[] = "test";
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char dest[32];
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char formatString[] = "non-const %s %s";
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HasCStr hcs(str);
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HasNoCStr hncs(str);
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int n = 10;
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printf("%d: %s\n", n, hcs.c_str());
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printf("%d: %s\n", n, hcs); // expected-warning{{cannot pass non-POD object of type 'HasCStr' to variadic function; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}}
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printf("%d: %s\n", n, hncs); // expected-warning{{cannot pass non-POD object of type 'HasNoCStr' to variadic function; expected type from format string was 'char *'}}
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sprintf(str, "%d: %s", n, hcs); // expected-warning{{cannot pass non-POD object of type 'HasCStr' to variadic function; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}}
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printf(formatString, hcs, hncs); // expected-warning{{cannot pass object of non-POD type 'HasCStr' through variadic function}} expected-warning{{cannot pass object of non-POD type 'HasNoCStr' through variadic function}}
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printf(extstr, hcs, n); // expected-warning{{cannot pass object of non-POD type 'HasCStr' through variadic function}}
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}
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struct Printf {
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Printf();
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Printf(const Printf&);
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Printf(const char *,...) __attribute__((__format__(__printf__,2,3)));
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};
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void constructor_test() {
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const char str[] = "test";
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HasCStr hcs(str);
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Printf p("%s %d %s", str, 10, 10); // expected-warning {{format specifies type 'char *' but the argument has type 'int'}}
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Printf q("%s %d", hcs, 10); // expected-warning {{cannot pass non-POD object of type 'HasCStr' to variadic constructor; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}}
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}
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