From 66d71a1b351a29189aede96f5e12db826492413d Mon Sep 17 00:00:00 2001
From: Barry Revzin <barry.revzin@gmail.com>
Date: Wed, 2 Nov 2022 13:04:54 -0500
Subject: [PATCH] Fixing formatting of range of range of char. (#3158)

---
 include/fmt/ranges.h | 5 +++--
 test/ranges-test.cc  | 8 ++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/fmt/ranges.h b/include/fmt/ranges.h
index 2105a668..2555b7e9 100644
--- a/include/fmt/ranges.h
+++ b/include/fmt/ranges.h
@@ -475,7 +475,7 @@ struct range_formatter<
     auto end = ctx.end();
     if (it == end || *it == '}') {
       maybe_set_debug_format();
-      return it;
+      return underlying_.parse(ctx);
     }
 
     if (*it == 'n') {
@@ -485,7 +485,8 @@ struct range_formatter<
 
     if (*it == '}') {
       maybe_set_debug_format();
-      return it;
+      ctx.advance_to(it);
+      return underlying_.parse(ctx);
     }
 
     if (*it != ':')
diff --git a/test/ranges-test.cc b/test/ranges-test.cc
index 3221e2ed..650b0e85 100644
--- a/test/ranges-test.cc
+++ b/test/ranges-test.cc
@@ -50,6 +50,14 @@ TEST(ranges_test, format_vector) {
   EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
   EXPECT_EQ(fmt::format("{::#x}", v), "[0x1, 0x2, 0x3, 0x5, 0x7, 0xb]");
   EXPECT_EQ(fmt::format("{:n:#x}", v), "0x1, 0x2, 0x3, 0x5, 0x7, 0xb");
+
+  auto vc = std::vector<char>{'a', 'b', 'c'};
+  auto vvc = std::vector<std::vector<char>>{vc, vc};
+  EXPECT_EQ(fmt::format("{}", vc), "['a', 'b', 'c']");
+  EXPECT_EQ(fmt::format("{}", vvc), "[['a', 'b', 'c'], ['a', 'b', 'c']]");
+  EXPECT_EQ(fmt::format("{:n}", vvc), "['a', 'b', 'c'], ['a', 'b', 'c']");
+  EXPECT_EQ(fmt::format("{:n:n}", vvc), "'a', 'b', 'c', 'a', 'b', 'c'");
+  EXPECT_EQ(fmt::format("{:n:n:}", vvc), "a, b, c, a, b, c");
 }
 
 TEST(ranges_test, format_vector2) {