From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tyler Veness <calcmogul@gmail.com>
Date: Wed, 29 May 2024 16:29:55 -0700
Subject: [PATCH 1/8] Use fmtlib

---
 include/.styleguide              |  1 +
 include/sleipnir/util/assert.hpp |  5 +++--
 include/sleipnir/util/print.hpp  | 31 ++++++++++++++++++-------------
 src/.styleguide                  |  1 +
 src/optimization/problem.cpp     |  1 +
 5 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/include/.styleguide b/include/.styleguide
index 1b6652d3d5886cf8c9eca0d855c21031775bad7c..4f4c76204071f90bf49eddb8c2aceb583b5e09ba 100644
--- a/include/.styleguide
+++ b/include/.styleguide
@@ -8,5 +8,6 @@ cppSrcFileInclude {
 
 includeOtherLibs {
   ^Eigen/
+  ^fmt/
   ^gch/
 }
diff --git a/include/sleipnir/util/assert.hpp b/include/sleipnir/util/assert.hpp
index 75d8ffca32accbf66ffce30f073de1db2f42469b..53de01928b929793fa77885ec4a6d1a928bdc5a9 100644
--- a/include/sleipnir/util/assert.hpp
+++ b/include/sleipnir/util/assert.hpp
@@ -3,9 +3,10 @@
 #pragma once
 
 #ifdef JORMUNGANDR
-#include <format>
 #include <source_location>
 #include <stdexcept>
+
+#include <fmt/format.h>
 /**
  * Throw an exception in Python.
  */
@@ -13,7 +14,7 @@
   do {                                                               \
     if (!(condition)) {                                              \
       auto location = std::source_location::current();               \
-      throw std::invalid_argument(std::format(                       \
+      throw std::invalid_argument(fmt::format(                       \
           "{}:{}: {}: Assertion `{}' failed.", location.file_name(), \
           location.line(), location.function_name(), #condition));   \
     }                                                                \
diff --git a/include/sleipnir/util/print.hpp b/include/sleipnir/util/print.hpp
index fe430352dabf4cd6a890dc8007237c7a261dfd4b..055d5c9fa246201f1d8ae7ddca00b1159aeb2a57 100644
--- a/include/sleipnir/util/print.hpp
+++ b/include/sleipnir/util/print.hpp
@@ -4,10 +4,15 @@
 
 #ifndef SLEIPNIR_DISABLE_DIAGNOSTICS
 #include <cstdio>
-#include <print>
 #include <system_error>
 #include <utility>
 
+#if __has_include(<fmt/base.h>)
+#include <fmt/base.h>
+#else
+#include <fmt/core.h>
+#endif
+
 #endif
 
 namespace slp {
@@ -15,45 +20,45 @@ namespace slp {
 #ifndef SLEIPNIR_DISABLE_DIAGNOSTICS
 
 /**
- * Wrapper around std::print() that squelches write failure exceptions.
+ * Wrapper around fmt::print() that squelches write failure exceptions.
  */
 template <typename... T>
-inline void print(std::format_string<T...> fmt, T&&... args) {
+inline void print(fmt::format_string<T...> fmt, T&&... args) {
   try {
-    std::print(fmt, std::forward<T>(args)...);
+    fmt::print(fmt, std::forward<T>(args)...);
   } catch (const std::system_error&) {
   }
 }
 
 /**
- * Wrapper around std::print() that squelches write failure exceptions.
+ * Wrapper around fmt::print() that squelches write failure exceptions.
  */
 template <typename... T>
-inline void print(std::FILE* f, std::format_string<T...> fmt, T&&... args) {
+inline void print(std::FILE* f, fmt::format_string<T...> fmt, T&&... args) {
   try {
-    std::print(f, fmt, std::forward<T>(args)...);
+    fmt::print(f, fmt, std::forward<T>(args)...);
   } catch (const std::system_error&) {
   }
 }
 
 /**
- * Wrapper around std::println() that squelches write failure exceptions.
+ * Wrapper around fmt::println() that squelches write failure exceptions.
  */
 template <typename... T>
-inline void println(std::format_string<T...> fmt, T&&... args) {
+inline void println(fmt::format_string<T...> fmt, T&&... args) {
   try {
-    std::println(fmt, std::forward<T>(args)...);
+    fmt::println(fmt, std::forward<T>(args)...);
   } catch (const std::system_error&) {
   }
 }
 
 /**
- * Wrapper around std::println() that squelches write failure exceptions.
+ * Wrapper around fmt::println() that squelches write failure exceptions.
  */
 template <typename... T>
-inline void println(std::FILE* f, std::format_string<T...> fmt, T&&... args) {
+inline void println(std::FILE* f, fmt::format_string<T...> fmt, T&&... args) {
   try {
-    std::println(f, fmt, std::forward<T>(args)...);
+    fmt::println(f, fmt, std::forward<T>(args)...);
   } catch (const std::system_error&) {
   }
 }
diff --git a/src/.styleguide b/src/.styleguide
index 1b6652d3d5886cf8c9eca0d855c21031775bad7c..4f4c76204071f90bf49eddb8c2aceb583b5e09ba 100644
--- a/src/.styleguide
+++ b/src/.styleguide
@@ -8,5 +8,6 @@ cppSrcFileInclude {
 
 includeOtherLibs {
   ^Eigen/
+  ^fmt/
   ^gch/
 }
diff --git a/src/optimization/problem.cpp b/src/optimization/problem.cpp
index c3331197e2365934273f57422b79fa18c2b78a5b..09828cdb6d7cddff692b9d17603dc0c11cd5a3ec 100644
--- a/src/optimization/problem.cpp
+++ b/src/optimization/problem.cpp
@@ -11,6 +11,7 @@
 
 #include <Eigen/Core>
 #include <Eigen/SparseCore>
+#include <fmt/chrono.h>
 #include <gch/small_vector.hpp>
 
 #include "optimization/bounds.hpp"