From a3e9620c78ae1e4ff156fbd8c662684959a37a10 Mon Sep 17 00:00:00 2001
From: artem-ogre <artem.ogre@gmail.com>
Date: Thu, 5 Dec 2024 10:11:19 +0100
Subject: [PATCH] #188 Provide polyfill for std::to_string for c++98
 compatibility

---
 CDT/include/CDTUtils.h      | 21 ++++++++++++++++++---
 CDT/include/Triangulation.h | 12 ++++++------
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/CDT/include/CDTUtils.h b/CDT/include/CDTUtils.h
index 1b9a0ff..0f9fb92 100644
--- a/CDT/include/CDTUtils.h
+++ b/CDT/include/CDTUtils.h
@@ -55,15 +55,18 @@ typedef char couldnt_parse_cxx_standard[-1]; ///< Error: couldn't parse standard
 
 #include <array>
 #include <functional>
+#include <string>
 #include <tuple>
 #include <unordered_map>
 #include <unordered_set>
+
 namespace CDT
 {
 using std::array;
 using std::get;
 using std::make_tuple;
 using std::tie;
+using std::to_string;
 using std::tuple;
 using std::unordered_map;
 using std::unordered_set;
@@ -72,6 +75,7 @@ using std::unordered_set;
 #else
 #include <boost/array.hpp>
 #include <boost/functional/hash.hpp>
+#include <boost/lexical_cast.hpp>
 #include <boost/tuple/tuple.hpp>
 #include <boost/unordered_map.hpp>
 #include <boost/unordered_set.hpp>
@@ -84,12 +88,17 @@ using boost::tie;
 using boost::tuple;
 using boost::unordered_map;
 using boost::unordered_set;
+
+template <typename T>
+std::string to_string(const T& value)
+{
+    return boost::lexical_cast<std::string>(value);
+}
 } // namespace CDT
 #endif
 
 namespace CDT
 {
-
 /// 2D vector
 template <typename T>
 struct CDT_EXPORT V2d
@@ -168,6 +177,7 @@ struct CDT_EXPORT Box2d
     {
         envelopPoint(p.x, p.y);
     }
+
     /// Envelop box around a point with given coordinates
     void envelopPoint(const T x, const T y)
     {
@@ -209,14 +219,19 @@ struct CDT_EXPORT Edge
 {
     /// Constructor
     Edge(VertInd iV1, VertInd iV2);
+
     /// Equals operator
     bool operator==(const Edge& other) const;
+
     /// Not-equals operator
     bool operator!=(const Edge& other) const;
+
     /// V1 getter
     VertInd v1() const;
+
     /// V2 getter
     VertInd v2() const;
+
     /// Edges' vertices
     const std::pair<VertInd, VertInd>& verts() const;
 
@@ -287,6 +302,7 @@ struct CDT_EXPORT Triangle
         }
         return std::make_pair(neighbors[2], vertices[0]);
     }
+
     /// Previous triangle adjacent to a vertex (counter-clockwise)
     /// @returns pair of previous triangle and the other vertex of a common edge
     std::pair<TriInd, VertInd> prev(const VertInd i) const
@@ -428,7 +444,6 @@ CDT_EXPORT T distanceSquared(const V2d<T>& a, const V2d<T>& b);
 
 /// Check if any of triangle's vertices belongs to a super-triangle
 CDT_INLINE_IF_HEADER_ONLY bool touchesSuperTriangle(const Triangle& t);
-
 } // namespace CDT
 
 #ifndef CDT_USE_AS_COMPILED_LIBRARY
@@ -444,7 +459,6 @@ namespace std
 namespace boost
 #endif
 {
-
 #ifdef CDT_USE_STRONG_TYPING
 
 /// Vertex index hasher
@@ -491,6 +505,7 @@ struct hash<CDT::Edge>
 #endif
         seed ^= Hasher()(key) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
     }
+
     static std::size_t hashEdge(const CDT::Edge& e)
     {
         const std::pair<CDT::VertInd, CDT::VertInd>& vv = e.verts();
diff --git a/CDT/include/Triangulation.h b/CDT/include/Triangulation.h
index 7ca3a3d..071210c 100644
--- a/CDT/include/Triangulation.h
+++ b/CDT/include/Triangulation.h
@@ -142,7 +142,7 @@ class Error : public std::runtime_error
     Error(const std::string& description, const SourceLocation& srcLoc)
         : std::runtime_error(
               description + "\nin '" + srcLoc.func() + "' at " + srcLoc.file() +
-              ":" + std::to_string(srcLoc.line()))
+              ":" + CDT::to_string(srcLoc.line()))
         , m_description(description)
         , m_srcLoc(srcLoc)
     {}
@@ -188,8 +188,8 @@ class DuplicateVertexError : public Error
         const VertInd v2,
         const SourceLocation& srcLoc)
         : Error(
-              "Duplicate vertex detected: #" + std::to_string(v1) +
-                  " is a duplicate of #" + std::to_string(v2),
+              "Duplicate vertex detected: #" + CDT::to_string(v1) +
+                  " is a duplicate of #" + CDT::to_string(v2),
               srcLoc)
         , m_v1(v1)
         , m_v2(v2)
@@ -220,9 +220,9 @@ class IntersectingConstraintsError : public Error
         const SourceLocation& srcLoc)
         : Error(
               "Intersecting constraint edges detected: (" +
-                  std::to_string(e1.v1()) + ", " + std::to_string(e1.v2()) +
-                  ") intersects (" + std::to_string(e2.v1()) + ", " +
-                  std::to_string(e2.v2()) + ")",
+                  CDT::to_string(e1.v1()) + ", " + CDT::to_string(e1.v2()) +
+                  ") intersects (" + CDT::to_string(e2.v1()) + ", " +
+                  CDT::to_string(e2.v2()) + ")",
               srcLoc)
         , m_e1(e1)
         , m_e2(e2)