Updates for c++17

SConscript

@@ -17,7 +17,7 @@ myenv=env.Clone()
 #myenv=myenv.Clone(CPPPATH=Split(cpppath))
 
 #	 $SECURITY_TRANSFORMS_HOME/libtransform/include 
-CPPFLAGS="--std=c++11"
+CPPFLAGS="--std=c++17"
 myenv.Append(CPPFLAGS=CPPFLAGS)
 
 #LIBPATH="$SECURITY_TRANSFORMS_HOME/lib"

pedi.cpp

@@ -17,6 +17,9 @@
 #include <limits.h>
 #include <stdlib.h>
 #include <assert.h>
+#include <algorithm>
+#include <cctype>
+#include <string>
 
 using namespace std;
 
@@ -196,6 +199,7 @@ void parse_args(int argc, char* argv[])
 }
 
 
+/*
 
 // trim from start (in place)
 static inline void ltrim(std::string &s) {
@@ -208,6 +212,17 @@ static inline void rtrim(std::string &s) {
     s.erase(std::find_if(s.rbegin(), s.rend(),
             std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
 }
+*/
+
+static inline void ltrim(std::string &s) {
+    s.erase(s.begin(), std::find_if(s.begin(), s.end(),
+            [](unsigned char ch) { return !std::isspace(ch); }));
+}
+
+static inline void rtrim(std::string &s) {
+    s.erase(std::find_if(s.rbegin(), s.rend(),
+            [](unsigned char ch) { return !std::isspace(ch); }).base(), s.end());
+}
 
 // trim from both ends (in place)
 static inline void trim(std::string &s) {