33 lines
942 B
C++
33 lines
942 B
C++
// RUN: %clang_cc1 -std=c++1y -verify %s
|
|
|
|
// expected-no-diagnostics
|
|
constexpr void copy(const char *from, unsigned long count, char *to) {
|
|
unsigned long n = (count + 7) / 8;
|
|
switch(count % 8) {
|
|
case 0: do { *to++ = *from++;
|
|
case 7: *to++ = *from++;
|
|
case 6: *to++ = *from++;
|
|
case 5: *to++ = *from++;
|
|
case 4: *to++ = *from++;
|
|
case 3: *to++ = *from++;
|
|
case 2: *to++ = *from++;
|
|
case 1: *to++ = *from++;
|
|
} while(--n > 0);
|
|
}
|
|
}
|
|
|
|
struct S {
|
|
char stuff[14];
|
|
constexpr S() : stuff{} {
|
|
copy("Hello, world!", 14, stuff);
|
|
}
|
|
};
|
|
|
|
constexpr bool streq(const char *a, const char *b) {
|
|
while (*a && *a == *b) ++a, ++b;
|
|
return *a == *b;
|
|
}
|
|
|
|
static_assert(streq(S().stuff, "Hello, world!"), "should be same");
|
|
static_assert(!streq(S().stuff, "Something else"), "should be different");
|