summaryrefslogtreecommitdiff
path: root/absl/strings/str_format.h
diff options
context:
space:
mode:
authorGravatar Abseil Team <absl-team@google.com>2019-06-13 09:14:42 -0700
committerGravatar Gennadiy Civil <misterg@google.com>2019-06-13 14:14:34 -0400
commit8f11724067248acc330b4d1f12f0c76d03f2cfb1 (patch)
treed7f7886de8a135636cf1d47956b0b5c8645db81c /absl/strings/str_format.h
parentb1dd425423380126f6441ce4fbb6f8f6c75b793a (diff)
Export of internal Abseil changes.
-- fc61fc3822d414a1abda906a81208d2667195de3 by Abseil Team <absl-team@google.com>: Clarify documentation relating to the output of the various printing functions. PiperOrigin-RevId: 253041344 -- 06cb414d1006cd89e38b381d52763b048909d69a by Jorg Brown <jorg@google.com>: Change absl::container_internal::CompressedTuple to instantiate its internal Storage class with the name of the type it's holding, rather than the name of the Tuple. This is not an externally-visible change, other than less compiler memory is used and less debug information is generated. PiperOrigin-RevId: 252940185 -- 33b3f3ed6037eac7d1b7989a3641370e92beaeb9 by Jorg Brown <jorg@google.com>: Change absl::container_internal::CompressedTuple to instantiate its internal Storage class with the name of the type it's holding, rather than the name of the Tuple. This is not an externally-visible change, other than less compiler memory is used and less debug information is generated. PiperOrigin-RevId: 252902091 -- 88595f4e7d6ac57bebdc9811045867f5d7477b5b by Abseil Team <absl-team@google.com>: Unset thread_local/__thread support for Emscripten. PiperOrigin-RevId: 252706297 -- cabd1715d873dc457271940335c764e62defb952 by Derek Mauro <dmauro@google.com>: Rollback LLVM and Bazel version due to intermittent network failures downloading from GitHub PiperOrigin-RevId: 252661245 GitOrigin-RevId: fc61fc3822d414a1abda906a81208d2667195de3 Change-Id: I4c30995a2db7acef19415ad519259131584db261
Diffstat (limited to 'absl/strings/str_format.h')
-rw-r--r--absl/strings/str_format.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/absl/strings/str_format.h b/absl/strings/str_format.h
index da3208e1..0b93c288 100644
--- a/absl/strings/str_format.h
+++ b/absl/strings/str_format.h
@@ -20,7 +20,8 @@
// The `str_format` library is a typesafe replacement for the family of
// `printf()` string formatting routines within the `<cstdio>` standard library
// header. Like the `printf` family, the `str_format` uses a "format string" to
-// perform argument substitutions based on types.
+// perform argument substitutions based on types. See the `FormatSpec` section
+// below for format string documentation.
//
// Example:
//
@@ -67,6 +68,7 @@
// In addition, the `str_format` library provides extension points for
// augmenting formatting to new types. These extensions are fully documented
// within the `str_format_extension.h` header file.
+
#ifndef ABSL_STRINGS_STR_FORMAT_H_
#define ABSL_STRINGS_STR_FORMAT_H_
@@ -211,6 +213,11 @@ class FormatCountCapture {
// written to this point. The resulting value must be captured within an
// `absl::FormatCountCapture` type.
//
+// Implementation-defined behavior:
+// * A null pointer provided to "%s" or "%p" is output as "(nil)".
+// * A non-null pointer provided to "%p" is output in hex as if by %#x or
+// %#lx.
+//
// NOTE: `o`, `x\X` and `u` will convert signed values to their unsigned
// counterpart before formatting.
//
@@ -226,7 +233,7 @@ class FormatCountCapture {
// "%e", .01 -> "1.00000e-2"
// "%a", -3.0 -> "-0x1.8p+1"
// "%g", .01 -> "1e-2"
-// "%p", *int -> "0x7ffdeb6ad2a4"
+// "%p", (void*)&value -> "0x7ffdeb6ad2a4"
//
// int n = 0;
// std::string s = absl::StrFormat(