From d15b5277cf8b346c1fd16af86979a1d26f19f594 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 24 Oct 2023 10:23:32 -0600
Subject: [PATCH] Make a bunch of arguments 'const'.

---
 source/base/mu_parser_internal.cc | 71 +++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 18 deletions(-)

diff --git a/source/base/mu_parser_internal.cc b/source/base/mu_parser_internal.cc
index 1f86157fc6..7c26d31cda 100644
--- a/source/base/mu_parser_internal.cc
+++ b/source/base/mu_parser_internal.cc
@@ -36,13 +36,17 @@ namespace internal
   namespace FunctionParser
   {
     int
-    mu_round(double val)
+    mu_round(const double val)
     {
       return static_cast<int>(val + ((val >= 0.0) ? 0.5 : -0.5));
     }
 
+
+
     double
-    mu_if(double condition, double thenvalue, double elsevalue)
+    mu_if(const double condition,
+          const double thenvalue,
+          const double elsevalue)
     {
       if (mu_round(condition) != 0)
         return thenvalue;
@@ -50,84 +54,110 @@ namespace internal
         return elsevalue;
     }
 
+
+
     double
-    mu_or(double left, double right)
+    mu_or(const double left, const double right)
     {
       return static_cast<double>((mu_round(left) != 0) ||
                                  (mu_round(right) != 0));
     }
 
+
+
     double
-    mu_and(double left, double right)
+    mu_and(const double left, const double right)
     {
       return static_cast<double>((mu_round(left) != 0) &&
                                  (mu_round(right) != 0));
     }
 
+
+
     double
-    mu_int(double value)
+    mu_int(const double value)
     {
       return static_cast<double>(mu_round(value));
     }
 
+
+
     double
-    mu_ceil(double value)
+    mu_ceil(const double value)
     {
       return std::ceil(value);
     }
 
+
+
     double
-    mu_floor(double value)
+    mu_floor(const double value)
     {
       return std::floor(value);
     }
 
+
+
     double
-    mu_cot(double value)
+    mu_cot(const double value)
     {
       return 1.0 / std::tan(value);
     }
 
+
+
     double
-    mu_csc(double value)
+    mu_csc(const double value)
     {
       return 1.0 / std::sin(value);
     }
 
+
+
     double
-    mu_sec(double value)
+    mu_sec(const double value)
     {
       return 1.0 / std::cos(value);
     }
 
+
+
     double
-    mu_log(double value)
+    mu_log(const double value)
     {
       return std::log(value);
     }
 
+
+
     double
-    mu_pow(double a, double b)
+    mu_pow(const double a, const double b)
     {
       return std::pow(a, b);
     }
 
+
+
     double
-    mu_erf(double value)
+    mu_erf(const double value)
     {
       return std::erf(value);
     }
 
+
+
     double
-    mu_erfc(double value)
+    mu_erfc(const double value)
     {
       return std::erfc(value);
     }
 
-    // returns a random value in the range [0,1] initializing the generator
-    // with the given seed
+
+
+    // Returns a random value in the range [0,1], after initializing the
+    // generator with the given seed
     double
-    mu_rand_seed(double seed)
+    mu_rand_seed(const double seed)
     {
       static std::mutex           rand_mutex;
       std::lock_guard<std::mutex> lock(rand_mutex);
@@ -144,7 +174,8 @@ namespace internal
       return uniform_distribution(rng_map[seed]);
     }
 
-    // returns a random value in the range [0,1]
+
+    // Returns a random value in the range [0,1]
     double
     mu_rand()
     {
@@ -156,6 +187,8 @@ namespace internal
       return uniform_distribution(rng);
     }
 
+
+
     std::vector<std::string>
     get_function_names()
     {
@@ -223,6 +256,8 @@ namespace internal
     };
 #endif
 
+
+
     template <int dim, typename Number>
     ParserImplementation<dim, Number>::ParserImplementation()
       : initialized(false)
-- 
2.39.5