Make FMT_COMPILE fallback on runtime without if constexpr (#2261)

2021-04-28 09:11:47 -07:00
parent 0cd0fb9184
commit 355be4b13f
2 changed files with 11 additions and 1 deletions
--- a/test/compile-test.cc
+++ b/test/compile-test.cc
@@ -155,6 +155,12 @@ TEST(CompileTest, EmptyFormatString) {
  EXPECT_EQ(fmt::format(f), "");
 }

+TEST(CompileTest, CompileFallback) {
+  // FMT_COMPILE should fallback on runtime formatting when `if constexpr` is
+  // not available.
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
+}
+
 #ifdef __cpp_if_constexpr
 TEST(CompileTest, FormatDefault) {
  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));