Merge pull request #908 from cppalliance/fmt_support

Author: mborland

.github/workflows/ci.yml

@@ -375,7 +375,7 @@ jobs:
                 done
             fi
             sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT update
-            sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y ${{join(matrix.install, ' ')}} locales
+            sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT install -y ${{join(matrix.install, ' ')}} locales libfmt-dev
             sudo locale-gen de_DE.UTF-8
             sudo update-locale
       - name: Setup GCC Toolchain

doc/decimal/format.adoc

@@ -5,7 +5,7 @@ https://www.boost.org/LICENSE_1_0.txt
 ////
 
 [#format]
-= format support
+= formating support
 :idprefix: format_
 
 == <format>
@@ -61,3 +61,26 @@ int main()
     return 0;
 }
 ----
+
+== <fmt/format.h>
+
+Support for fmtlib is available as long as `<fmt/format.h>` is present.
+All of the above information on modifiers is the same for fmtlib
+
+[source, c++]
+----
+#include <fmt/format.h>
+#include <boost/decimal.hpp>
+#include <iostream>
+
+int main()
+{
+    constexpr boost::decimal::decimal64 val1 {314, -2};
+    constexpr boost::decimal::decimal32 val2 {3141, -3};
+
+    std::cout << fmt::format("{:10.3e}", val1) << '\n';
+    std::cout << fmt::format("{:10.3e}", val2) << std::endl;
+
+    return 0;
+}
+----

include/boost/decimal.hpp

@@ -43,6 +43,7 @@
 #include <boost/decimal/bid_conversion.hpp>
 #include <boost/decimal/dpd_conversion.hpp>
 #include <boost/decimal/string.hpp>
+#include <boost/decimal/fmt_format.hpp>
 
 #if defined(__clang__) && !defined(__GNUC__)
 #  pragma clang diagnostic pop