From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 20:24:20 +0200
Subject: Adding upstream version 14.2.21.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../libs/multiprecision/example/logged_adaptor.cpp | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 src/boost/libs/multiprecision/example/logged_adaptor.cpp

(limited to 'src/boost/libs/multiprecision/example/logged_adaptor.cpp')

diff --git a/src/boost/libs/multiprecision/example/logged_adaptor.cpp b/src/boost/libs/multiprecision/example/logged_adaptor.cpp
new file mode 100644
index 00000000..f204cf39
--- /dev/null
+++ b/src/boost/libs/multiprecision/example/logged_adaptor.cpp
@@ -0,0 +1,119 @@
+///////////////////////////////////////////////////////////////
+//  Copyright 2013 John Maddock. Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
+
+//[logged_adaptor
+
+#include <boost/multiprecision/mpfi.hpp>
+#include <boost/multiprecision/logged_adaptor.hpp>
+#include <iostream>
+#include <iomanip>
+//
+// Begin by overloading log_postfix_event so we can capture each arithmetic event as it happens:
+//
+namespace boost{ namespace multiprecision{
+
+template <unsigned D>
+inline void log_postfix_event(const mpfi_float_backend<D>& val, const char* event_description)
+{
+   // Print out the (relative) diameter of the interval:
+   using namespace boost::multiprecision;
+   number<mpfr_float_backend<D> > diam;
+   mpfi_diam(diam.backend().data(), val.data());
+   std::cout << "Diameter was " << diam << " after operation: " << event_description << std::endl;
+}
+template <unsigned D, class T>
+inline void log_postfix_event(const mpfi_float_backend<D>&, const T&, const char* event_description)
+{
+   // This version is never called in this example.
+}
+
+}}
+
+
+int main()
+{
+   using namespace boost::multiprecision;
+   typedef number<logged_adaptor<mpfi_float_backend<17> > > logged_type;
+   //
+   // Test case deliberately introduces cancellation error, relative size of interval
+   // gradually gets larger after each operation:
+   //
+   logged_type a = 1;
+   a /= 10;
+
+   for(unsigned i = 0; i < 13; ++i)
+   {
+      logged_type b = a * 9;
+      b /= 10;
+      a -= b;
+   }
+   std::cout << "Final value was: " << a << std::endl;
+   return 0;
+}
+
+//]
+
+/*
+//[logged_adaptor_output
+
+Diameter was nan after operation: Default construct
+Diameter was 0 after operation: Assignment from arithmetic type
+Diameter was 4.33681e-18 after operation: /=
+Diameter was nan after operation: Default construct
+Diameter was 7.70988e-18 after operation: *
+Diameter was 9.63735e-18 after operation: /=
+Diameter was 1.30104e-16 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 1.30104e-16 after operation: *
+Diameter was 1.38537e-16 after operation: /=
+Diameter was 2.54788e-15 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 2.54788e-15 after operation: *
+Diameter was 2.54863e-15 after operation: /=
+Diameter was 4.84164e-14 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 4.84164e-14 after operation: *
+Diameter was 4.84221e-14 after operation: /=
+Diameter was 9.19962e-13 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 9.19962e-13 after operation: *
+Diameter was 9.19966e-13 after operation: /=
+Diameter was 1.74793e-11 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 1.74793e-11 after operation: *
+Diameter was 1.74793e-11 after operation: /=
+Diameter was 3.32107e-10 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 3.32107e-10 after operation: *
+Diameter was 3.32107e-10 after operation: /=
+Diameter was 6.31003e-09 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 6.31003e-09 after operation: *
+Diameter was 6.31003e-09 after operation: /=
+Diameter was 1.19891e-07 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 1.19891e-07 after operation: *
+Diameter was 1.19891e-07 after operation: /=
+Diameter was 2.27792e-06 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 2.27792e-06 after operation: *
+Diameter was 2.27792e-06 after operation: /=
+Diameter was 4.32805e-05 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 4.32805e-05 after operation: *
+Diameter was 4.32805e-05 after operation: /=
+Diameter was 0.00082233 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 0.00082233 after operation: *
+Diameter was 0.00082233 after operation: /=
+Diameter was 0.0156243 after operation: -=
+Diameter was nan after operation: Default construct
+Diameter was 0.0156243 after operation: *
+Diameter was 0.0156243 after operation: /=
+Diameter was 0.296861 after operation: -=
+Final value was: {8.51569e-15,1.14843e-14}
+
+//]
+*/
-- 
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