deploy: 8d7e0046f4

examples/format_as.cpp

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+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // create a JSON value
+    json j = {{"one", 1}, {"two", 2}};
+
+    // format_as() is found via argument-dependent lookup, the same way
+    // fmt::format/fmt::print would find it
+    auto j_str = format_as(j);
+
+    std::cout << j_str << std::endl;
+}

examples/format_as.output

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+{"one":1,"two":2}

examples/std_formatter.c++20.cpp

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+#include <format>
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    json j = {{"one", 1}, {"two", 2}};
+
+    // compact formatting, like dump()
+    std::cout << std::format("{}", j) << "\n\n";
+
+    // pretty-printed formatting, like dump(4)
+    std::cout << std::format("{:#}", j) << "\n\n";
+
+    // a width sets the indent, like dump(2)
+    std::cout << std::format("{:2}", j) << "\n\n";
+
+    // fill-and-align sets the indent character, like dump(4, '.')
+    std::cout << std::format("{:.>#}", j) << std::endl;
+}

examples/std_formatter.c++20.output

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+{"one":1,"two":2}
+
+{
+    "one": 1,
+    "two": 2
+}
+
+{
+  "one": 1,
+  "two": 2
+}
+
+{
+...."one": 1,
+...."two": 2
+}