Add args() accessor back to fmt::format_context (#4310)

Add args() accessor back to fmt::format_context Add test that would fail to compile if you can't create a fmt::format_context from another fmt::format_context
fmtlib · Jan 17, 2025 · 937b7c5 · 937b7c5
1 parent 01914f0
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diff --git a/include/fmt/base.h b/include/fmt/base.h
@@ -2656,6 +2656,7 @@ class context {
   FMT_CONSTEXPR auto arg_id(string_view name) const -> int {
     return args_.get_id(name);
   }
+  auto args() const -> const format_args& { return args_; }
 
   // Returns an iterator to the beginning of the output range.
   FMT_CONSTEXPR auto out() const -> iterator { return out_; }

diff --git a/test/base-test.cc b/test/base-test.cc
@@ -875,3 +875,12 @@ TEST(base_test, no_repeated_format_string_conversions) {
   fmt::format_to(buf, nondeterministic_format_string());
 #endif
 }
+
+TEST(base_test, format_context_accessors) {
+  class copier {
+    static fmt::format_context copy(fmt::appender app,
+                                    const fmt::format_context& ctx) {
+      return fmt::format_context(std::move(app), ctx.args(), ctx.locale());
+    }
+  };
+}