From d10980bc9f831d657a3aee1e4a85dc6fe8d7e861 Mon Sep 17 00:00:00 2001
From: MTahaK <taha.khokhar@mail.utoronto.ca>
Date: Tue, 12 Dec 2023 18:46:38 -0500
Subject: [PATCH] Added conditions to include stdfloat, and new workflow for
 GCC 13

---
 .github/workflows/ubuntu22-gcc13.yml | 23 +++++++++++++++++++++++
 include/fast_float/parse_number.h    | 16 ++++++++++------
 2 files changed, 33 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/ubuntu22-gcc13.yml

diff --git a/.github/workflows/ubuntu22-gcc13.yml b/.github/workflows/ubuntu22-gcc13.yml
new file mode 100644
index 0000000..7757f8a
--- /dev/null
+++ b/.github/workflows/ubuntu22-gcc13.yml
@@ -0,0 +1,23 @@
+name: Ubuntu 22.04 CI (GCC 13)
+
+on: [push, pull_request]
+
+jobs:
+  ubuntu-build:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use cmake
+        run: |
+          mkdir build &&
+          cd build &&
+          CXX=g++-13 CXXFLAGS=-Werror cmake -DFASTFLOAT_TEST=ON  ..  &&
+          cmake --build .   &&
+          ctest --output-on-failure
+      - name: Use cmake CXX20
+        run: |
+          mkdir build20 &&
+          cd build20 &&
+          CXX=g++-13 CXXFLAGS=-Werror cmake -DFASTFLOAT_CONSTEXPR_TESTS=ON -DFASTFLOAT_CXX_STANDARD=20 -DFASTFLOAT_TEST=ON  ..  &&
+          cmake --build .   &&
+          ctest --output-on-failure
\ No newline at end of file
diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index c65099b..656d0dd 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -10,7 +10,9 @@
 #include <cstring>
 #include <limits>
 #include <system_error>
-#include <stdfloat>
+#if __cplusplus >= 202300L || _MSVC_LANG >= 202300L
+  #include <stdfloat>
+#endif
 namespace fast_float {
 
 
@@ -137,8 +139,9 @@ template<typename T, typename UC>
 FASTFLOAT_CONSTEXPR20
 from_chars_result_t<UC> from_chars(UC const * first, UC const * last,
                              T &value, chars_format fmt /*= chars_format::general*/)  noexcept  {
-#ifdef __STDCPP_FLOAT32_T__
-  // if std::float32_t is defined, then we are in C++23 mode; macro set for float32; 
+#if __cplusplus >= 202300L || _MSVC_LANG >= 202300L
+  #ifdef __STDCPP_FLOAT32_T__
+  // if std::float32_t is defined, and we are in C++23 mode; macro set for float32; 
   // set value to float due to equivalence between float and float32_t
   if(std::is_same<T, std::float32_t>::value){
     float value32; 
@@ -146,9 +149,9 @@ from_chars_result_t<UC> from_chars(UC const * first, UC const * last,
     value = value32;
     return ret;
   }
-#endif
-#ifdef __STDCPP_FLOAT64_T__
-  // if std::float64_t is defined, then we are in C++23 mode; macro set for float64;
+  #endif
+  #ifdef __STDCPP_FLOAT64_T__
+  // if std::float64_t is defined, and we are in C++23 mode; macro set for float64;
   // set value as double due to equivalence between double and float64_t
   if(std::is_same<T, std::float64_t>::value){
     double value64; 
@@ -156,6 +159,7 @@ from_chars_result_t<UC> from_chars(UC const * first, UC const * last,
     value = value64;
     return ret;
   }
+  #endif
 #endif
   return from_chars_advanced(first, last, value, parse_options_t<UC>{fmt});
 }