diff options
Diffstat (limited to 'absl/strings/str_format.h')
| -rw-r--r-- | absl/strings/str_format.h | 11 |
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( |