summaryrefslogtreecommitdiff
path: root/absl/strings/string_view.h
diff options
context:
space:
mode:
Diffstat (limited to 'absl/strings/string_view.h')
-rw-r--r--absl/strings/string_view.h29
1 files changed, 12 insertions, 17 deletions
diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index 9c03108b..6bcd3c4e 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -173,8 +173,19 @@ class string_view {
// Implicit constructor of a `string_view` from nul-terminated `str`. When
// accepting possibly null strings, use `absl::NullSafeStringView(str)`
// instead (see below).
+#if ABSL_HAVE_BUILTIN(__builtin_strlen) || \
+ (defined(__GNUC__) && !defined(__clang__))
+ // GCC has __builtin_strlen according to
+ // https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Other-Builtins.html, but
+ // ABSL_HAVE_BUILTIN doesn't detect that, so we use the extra checks above.
+ // __builtin_strlen is constexpr.
+ constexpr string_view(const char* str) // NOLINT(runtime/explicit)
+ : ptr_(str),
+ length_(CheckLengthInternal(str ? __builtin_strlen(str) : 0)) {}
+#else
constexpr string_view(const char* str) // NOLINT(runtime/explicit)
- : ptr_(str), length_(CheckLengthInternal(StrLenInternal(str))) {}
+ : ptr_(str), length_(CheckLengthInternal(str ? strlen(str) : 0)) {}
+#endif
// Implicit constructor of a `string_view` from a `const char*` and length.
constexpr string_view(const char* data, size_type len)
@@ -481,22 +492,6 @@ class string_view {
static constexpr size_type kMaxSize =
std::numeric_limits<difference_type>::max();
- // check whether __builtin_strlen is provided by the compiler.
- // GCC doesn't have __has_builtin()
- // (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66970),
- // but has __builtin_strlen according to
- // https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Other-Builtins.html.
-#if ABSL_HAVE_BUILTIN(__builtin_strlen) || \
- (defined(__GNUC__) && !defined(__clang__))
- static constexpr size_type StrLenInternal(const char* str) {
- return str ? __builtin_strlen(str) : 0;
- }
-#else
- static constexpr size_type StrLenInternal(const char* str) {
- return str ? strlen(str) : 0;
- }
-#endif
-
static constexpr size_type CheckLengthInternal(size_type len) {
return ABSL_ASSERT(len <= kMaxSize), len;
}