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// RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -Wconversion -verify %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -Wconversion %s 2>&1 | FileCheck %s
#include <stddef.h>
typedef signed char int8_t;
typedef signed short int16_t;
typedef signed int int32_t;
typedef signed long int64_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long uint64_t;
// <rdar://problem/7909130>
namespace test0 {
int32_t test1_positive(char *I, char *E) {
return (E - I); // expected-warning {{implicit conversion loses integer precision}}
}
int32_t test1_negative(char *I, char *E) {
return static_cast<int32_t>(E - I);
}
uint32_t test2_positive(uint64_t x) {
return x; // expected-warning {{implicit conversion loses integer precision}}
}
uint32_t test2_negative(uint64_t x) {
return (uint32_t) x;
}
}
namespace test1 {
uint64_t test1(int x, unsigned y) {
return sizeof(x == y);
}
uint64_t test2(int x, unsigned y) {
return __alignof(x == y);
}
void * const foo();
bool test2(void *p) {
return p == foo();
}
}
namespace test2 {
struct A {
unsigned int x : 2;
A() : x(10) {} // expected-warning {{implicit truncation from 'int' to bitfield changes value from 10 to 2}}
};
}
// This file tests -Wnull-conversion, a subcategory of -Wconversion
// which is on by default.
void test3() {
int a = NULL; // expected-warning {{implicit conversion of NULL constant to 'int'}}
int b;
b = NULL; // expected-warning {{implicit conversion of NULL constant to 'int'}}
long l = NULL; // FIXME: this should also warn, but currently does not if sizeof(NULL)==sizeof(inttype)
int c = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to 'int'}}
int d;
d = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to 'int'}}
bool bl = NULL; // FIXME: this should warn but we currently suppress a bunch of conversion-to-bool warnings including this one
char ch = NULL; // expected-warning {{implicit conversion of NULL constant to 'char'}}
unsigned char uch = NULL; // expected-warning {{implicit conversion of NULL constant to 'unsigned char'}}
short sh = NULL; // expected-warning {{implicit conversion of NULL constant to 'short'}}
// Use FileCheck to ensure we don't get any unnecessary macro-expansion notes
// (that don't appear as 'real' notes & can't be seen/tested by -verify)
// CHECK-NOT: note:
// CHECK: note: expanded from macro 'FNULL'
#define FNULL NULL
int a2 = FNULL; // expected-warning {{implicit conversion of NULL constant to 'int'}}
// CHECK-NOT: note:
// CHECK: note: expanded from macro 'FINIT'
#define FINIT int a3 = NULL;
FINIT // expected-warning {{implicit conversion of NULL constant to 'int'}}
}
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