🚧 add more annotations

README.md

@@ -1076,6 +1076,8 @@ The class contains the UTF-8 Decoder from Bjoern Hoehrmann which is licensed und
 
 The class contains a slightly modified version of the Grisu2 algorithm from Florian Loitsch which is licensed under the [MIT License](http://opensource.org/licenses/MIT) (see above). Copyright © 2009 [Florian Loitsch](http://florian.loitsch.com/)
 
+The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](http://creativecommons.org/publicdomain/zero/1.0/).
+
 ## Contact
 
 If you have questions regarding the library, I would like to invite you to [open an issue at GitHub](https://github.com/nlohmann/json/issues/new/choose). Please describe your request, problem, or question as detailed as possible, and also mention the version of the library you are using as well as the version of your compiler and operating system. Opening an issue at GitHub allows other users and contributors to this library to collaborate. For instance, I have little experience with MSVC, and most issues in this regard have been solved by a growing community. If you have a look at the [closed issues](https://github.com/nlohmann/json/issues?q=is%3Aissue+is%3Aclosed), you will see that we react quite timely in most cases.
@@ -1285,6 +1287,7 @@ The library itself consists of a single header file licensed under the MIT licen
 - [**git-update-ghpages**](https://github.com/rstacruz/git-update-ghpages) to upload the documentation to gh-pages
 - [**GitHub Changelog Generator**](https://github.com/skywinder/github-changelog-generator) to generate the [ChangeLog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
 - [**Google Benchmark**](https://github.com/google/benchmark) to implement the benchmarks
+- [**Hedley**](https://nemequ.github.io/hedley/) to avoid re-inventing several compiler-agnostic feature macros
 - [**lcov**](http://ltp.sourceforge.net/coverage/lcov.php) to process coverage information and create a HTML view
 - [**libFuzzer**](http://llvm.org/docs/LibFuzzer.html) to implement fuzz testing for OSS-Fuzz
 - [**OSS-Fuzz**](https://github.com/google/oss-fuzz) for continuous fuzz testing of the library ([project repository](https://github.com/google/oss-fuzz/tree/master/projects/json))

include/nlohmann/detail/input/lexer.hpp

@@ -60,6 +60,7 @@ class lexer
 
     /// return name of values of type token_type (only used for errors)
     JSON_HEDLEY_RETURNS_NON_NULL
+    JSON_HEDLEY_CONST
     static const char* token_type_name(const token_type t) noexcept
     {
         switch (t)
@@ -119,6 +120,7 @@ class lexer
     /////////////////////
 
     /// return the locale-dependent decimal point
+    JSON_HEDLEY_PURE
     static char get_decimal_point() noexcept
     {
         const auto loc = localeconv();
@@ -817,18 +819,21 @@ class lexer
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(float& f, const char* str, char** endptr) noexcept
     {
         f = std::strtof(str, endptr);
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(double& f, const char* str, char** endptr) noexcept
     {
         f = std::strtod(str, endptr);
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(long double& f, const char* str, char** endptr) noexcept
     {
         f = std::strtold(str, endptr);

single_include/nlohmann/json.hpp

@@ -7083,6 +7083,7 @@ class lexer
 
     /// return name of values of type token_type (only used for errors)
     JSON_HEDLEY_RETURNS_NON_NULL
+    JSON_HEDLEY_CONST
     static const char* token_type_name(const token_type t) noexcept
     {
         switch (t)
@@ -7142,6 +7143,7 @@ class lexer
     /////////////////////
 
     /// return the locale-dependent decimal point
+    JSON_HEDLEY_PURE
     static char get_decimal_point() noexcept
     {
         const auto loc = localeconv();
@@ -7840,18 +7842,21 @@ class lexer
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(float& f, const char* str, char** endptr) noexcept
     {
         f = std::strtof(str, endptr);
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(double& f, const char* str, char** endptr) noexcept
     {
         f = std::strtod(str, endptr);
     }
 
     JSON_HEDLEY_NON_NULL(2)
+    JSON_HEDLEY_CONST
     static void strtof(long double& f, const char* str, char** endptr) noexcept
     {
         f = std::strtold(str, endptr);