From a8e2823d687dc2c7e1f771ad3c310c619e77ccae Mon Sep 17 00:00:00 2001
From: Sean Robinson <sean.robinson@scottsdalecc.edu>
Date: Thu, 11 Aug 2022 13:35:14 -0700
Subject: [PATCH] Replace constexpr generic_strtod with inline const

clang-ci >= 13.0 is failing to compile a constexpr function pointer
assignment.  This is possibly due to strtof (and family) not being
implemented as constexpr in the relevant libc++.

Closes #136
Closes #156

Signed-off-by: Sean Robinson <sean.robinson@scottsdalecc.edu>
---
 include/argparse/argparse.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/argparse/argparse.hpp b/include/argparse/argparse.hpp
index 569704e..b88ac63 100644
--- a/include/argparse/argparse.hpp
+++ b/include/argparse/argparse.hpp
@@ -246,10 +246,10 @@ template <class T> struct parse_number<T> {
 
 namespace {
 
-template <class T> constexpr auto generic_strtod = nullptr;
-template <> constexpr auto generic_strtod<float> = strtof;
-template <> constexpr auto generic_strtod<double> = strtod;
-template <> constexpr auto generic_strtod<long double> = strtold;
+template <class T> inline const auto generic_strtod = nullptr;
+template <> inline const auto generic_strtod<float> = strtof;
+template <> inline const auto generic_strtod<double> = strtod;
+template <> inline const auto generic_strtod<long double> = strtold;
 
 } // namespace