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authorGravatar Abseil Team <absl-team@google.com>2019-08-30 15:03:24 -0400
committerGravatar Gennadiy Civil <misterg@google.com>2019-08-30 15:38:01 -0400
commit1948f6f967e34db9793cfa8b4bcbaf370d039fd8 (patch)
treeb29287f3d7f35dca5042dfea5a3dac857303b841 /absl/strings/string_view.h
parenta0d1e098c2f99694fa399b175a7ccf920762030e (diff)
Export of internal Abseil changes
-- bc74316103bbda92541896f588f71c9d45bea768 by Gennadiy Civil <misterg@google.com>: Manually fixing the BUILD.bazel files -- d41bf9ea916a0dc8c69e6ba77f58f9d55649880e by Shaindel Schwartz <shaindel@google.com>: Minor cleanup to miscellaneous BUILD files. PiperOrigin-RevId: 266420157 -- 08a8dc2cbd48d27e1115809f9ca8d178551cd66e by Gennadiy Civil <misterg@google.com>: Internal Change BEGIN_PUBLIC Internal Change END_PUBLIC -- 8617d58fde1ece40e4aa79eaa5e250b42d19835f by Shaindel Schwartz <shaindel@google.com>: Internal Change BEGIN_PUBLIC Internal Change END_PUBLIC -- 3a0fc7d48bdc70c4f7dffc219578693dea84eb2d by Derek Mauro <dmauro@google.com>: Implement absl::string_view::at() PiperOrigin-RevId: 266024644 -- ba53a9da8ede8fe7b8971eaab6b3a1fa34763ff6 by Andy Soffer <asoffer@google.com>: Remove forcing of optimization levels in MSVC. PiperOrigin-RevId: 265927588 -- df86f2046b54bba7da2e345040806d43470de5c0 by Shaindel Schwartz <shaindel@google.com>: Internal change PiperOrigin-RevId: 265811077 -- e2e3a6e8194363e7c6377672560c806d638a7c74 by Derek Mauro <dmauro@google.com>: Remove ABI unsafe mixed exceptions mode compilation. Testing will now be done on CI with the exceptions flag set globally. PiperOrigin-RevId: 265796079 GitOrigin-RevId: bc74316103bbda92541896f588f71c9d45bea768 Change-Id: Ibccd00f4829520454aa55c4f55c7cb2dc9c6b65a
Diffstat (limited to 'absl/strings/string_view.h')
-rw-r--r--absl/strings/string_view.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index a1b5a17b..68b90aa3 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -269,10 +269,22 @@ class string_view {
// string_view::operator[]
//
- // Returns the ith element of an `string_view` using the array operator.
+ // Returns the ith element of the `string_view` using the array operator.
// Note that this operator does not perform any bounds checking.
constexpr const_reference operator[](size_type i) const { return ptr_[i]; }
+ // string_view::at()
+ //
+ // Returns the ith element of the `string_view`. Bounds checking is performed,
+ // and an exception of type `std::out_of_range` will be thrown on invalid
+ // access.
+ constexpr const_reference at(size_type i) const {
+ return ABSL_PREDICT_TRUE(i < size())
+ ? ptr_[i]
+ : (base_internal::ThrowStdOutOfRange("absl::string_view::at"),
+ ptr_[i]);
+ }
+
// string_view::front()
//
// Returns the first element of a `string_view`.