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-rw-r--r--absl/strings/substitute.h91
1 files changed, 53 insertions, 38 deletions
diff --git a/absl/strings/substitute.h b/absl/strings/substitute.h
index 43d73ad7..3ba7f4d3 100644
--- a/absl/strings/substitute.h
+++ b/absl/strings/substitute.h
@@ -5,7 +5,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
@@ -35,19 +35,21 @@
// and single digit positional ids to indicate which substitution arguments to
// use at that location within the format string.
//
+// A '$$' sequence in the format string causes a literal '$' character to be
+// output.
+//
// Example 1:
-// string s = Substitute("$1 purchased $0 $2. Thanks $1!",
-// 5, "Bob", "Apples");
-// EXPECT_EQ("Bob purchased 5 Apples. Thanks Bob!", s);
+// std::string s = Substitute("$1 purchased $0 $2 for $$10. Thanks $1!",
+// 5, "Bob", "Apples");
+// EXPECT_EQ("Bob purchased 5 Apples for $10. Thanks Bob!", s);
//
// Example 2:
-// string s = "Hi. ";
+// std::string s = "Hi. ";
// SubstituteAndAppend(&s, "My name is $0 and I am $1 years old.", "Bob", 5);
// EXPECT_EQ("Hi. My name is Bob and I am 5 years old.", s);
//
-//
// Supported types:
-// * absl::string_view, string, const char* (null is equivalent to "")
+// * absl::string_view, std::string, const char* (null is equivalent to "")
// * int32_t, int64_t, uint32_t, uint64
// * float, double
// * bool (Printed as "true" or "false")
@@ -70,6 +72,8 @@
#include <cstring>
#include <string>
+#include <type_traits>
+#include <vector>
#include "absl/base/macros.h"
#include "absl/base/port.h"
@@ -82,7 +86,7 @@
#include "absl/strings/strip.h"
namespace absl {
-inline namespace lts_2018_12_18 {
+inline namespace lts_2019_08_08 {
namespace substitute_internal {
// Arg
@@ -153,6 +157,17 @@ class Arg {
Arg(Hex hex); // NOLINT(runtime/explicit)
Arg(Dec dec); // NOLINT(runtime/explicit)
+ // vector<bool>::reference and const_reference require special help to
+ // convert to `AlphaNum` because it requires two user defined conversions.
+ template <typename T,
+ absl::enable_if_t<
+ std::is_class<T>::value &&
+ (std::is_same<T, std::vector<bool>::reference>::value ||
+ std::is_same<T, std::vector<bool>::const_reference>::value)>* =
+ nullptr>
+ Arg(T value) // NOLINT(google-explicit-constructor)
+ : Arg(static_cast<bool>(value)) {}
+
// `void*` values, with the exception of `char*`, are printed as
// "0x<hex value>". However, in the case of `nullptr`, "NULL" is printed.
Arg(const void* value); // NOLINT(runtime/explicit)
@@ -457,7 +472,7 @@ void SubstituteAndAppend(
// Example:
// template <typename... Args>
// void VarMsg(absl::string_view format, const Args&... args) {
-// string s = absl::Substitute(format, args...);
+// std::string s = absl::Substitute(format, args...);
ABSL_MUST_USE_RESULT inline std::string Substitute(absl::string_view format) {
std::string result;
@@ -575,70 +590,70 @@ std::string Substitute(const char* format, const substitute_internal::Arg& a0)
"contains one of $1-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1)
+ const substitute_internal::Arg& a1)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 3,
"There were 2 substitution arguments given, but "
"this format std::string is either missing its $0/$1, or "
"contains one of $2-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 7,
"There were 3 substitution arguments given, but "
"this format std::string is either missing its $0/$1/$2, or "
"contains one of $3-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2,
- const substitute_internal::Arg& a3)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2,
+ const substitute_internal::Arg& a3)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 15,
"There were 4 substitution arguments given, but "
"this format std::string is either missing its $0-$3, or "
"contains one of $4-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2,
- const substitute_internal::Arg& a3,
- const substitute_internal::Arg& a4)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2,
+ const substitute_internal::Arg& a3,
+ const substitute_internal::Arg& a4)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 31,
"There were 5 substitution arguments given, but "
"this format std::string is either missing its $0-$4, or "
"contains one of $5-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2,
- const substitute_internal::Arg& a3,
- const substitute_internal::Arg& a4,
- const substitute_internal::Arg& a5)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2,
+ const substitute_internal::Arg& a3,
+ const substitute_internal::Arg& a4,
+ const substitute_internal::Arg& a5)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 63,
"There were 6 substitution arguments given, but "
"this format std::string is either missing its $0-$5, or "
"contains one of $6-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2,
- const substitute_internal::Arg& a3,
- const substitute_internal::Arg& a4,
- const substitute_internal::Arg& a5,
- const substitute_internal::Arg& a6)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2,
+ const substitute_internal::Arg& a3,
+ const substitute_internal::Arg& a4,
+ const substitute_internal::Arg& a5,
+ const substitute_internal::Arg& a6)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 127,
"There were 7 substitution arguments given, but "
"this format std::string is either missing its $0-$6, or "
"contains one of $7-$9");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
- const substitute_internal::Arg& a1,
- const substitute_internal::Arg& a2,
- const substitute_internal::Arg& a3,
- const substitute_internal::Arg& a4,
- const substitute_internal::Arg& a5,
- const substitute_internal::Arg& a6,
- const substitute_internal::Arg& a7)
+ const substitute_internal::Arg& a1,
+ const substitute_internal::Arg& a2,
+ const substitute_internal::Arg& a3,
+ const substitute_internal::Arg& a4,
+ const substitute_internal::Arg& a5,
+ const substitute_internal::Arg& a6,
+ const substitute_internal::Arg& a7)
ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 255,
"There were 8 substitution arguments given, but "
"this format std::string is either missing its $0-$7, or "
@@ -667,7 +682,7 @@ std::string Substitute(
"format std::string doesn't contain all of $0 through $9");
#endif // ABSL_BAD_CALL_IF
-} // inline namespace lts_2018_12_18
+} // inline namespace lts_2019_08_08
} // namespace absl
#endif // ABSL_STRINGS_SUBSTITUTE_H_
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