From a7e376afd1992c293895582dc1d2a0cc6e8ca1ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?T=C3=BCske?= <torin@git.sch.bme.hu>
Date: Sat, 2 May 2015 14:59:28 +0200
Subject: [PATCH] =?UTF-8?q?PHP=20list()=20II.=20=E2=80=93=20a=20nehezebbik?=
=?UTF-8?q?=20fele?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit
---
main.cpp | 80 ++++++++++++++++++++++++++++++++++++------------------
szorg5.cdp | 1 +
2 files changed, 55 insertions(+), 26 deletions(-)
create mode 100644 szorg5.cdp
diff --git a/main.cpp b/main.cpp
index 08977f0..c484ce8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,44 +1,72 @@
#include <iostream>
#include <string>
#include <sstream>
+#include <vector>
+#include <tuple>
-template<class T>
-void unpack(std::istringstream& s, T& arg)
-{
- s>>arg;
-}
+template<class ...T>
+class container;
-template<class T>
-void unpack(std::istringstream&& s, T& arg)
-{
- s>>arg;
-}
+template<class ...T>
+container<T...> list(T&...args);
-template<class T, class ...V>
-void unpack(std::istringstream& s, T& arg , V& ...args)
+template<class ...T>
+class container
{
- s>>arg;
- unpack(s,args...);
-}
+private:
+ std::tuple<T&...> tu;
+public:
+ container(T&...args):tu{args...}{}
+
+ template<class ...F>
+ friend container<T...> list(T&...args);
+
+ template<int I>
+ typename std::enable_if<I==1>::type readhelper(std::vector<std::string>& s)
+ {
+ std::istringstream is{s[I-1]};
+ is>>std::get<I-1>(tu);
+ }
+
+ template<int I>
+ typename std::enable_if<I!=1>::type readhelper(std::vector<std::string>& s)
+ {
+ readhelper<I-1>(s);
+ std::istringstream is{s[I-1]};
+ is>>std::get<I-1>(tu);
+ }
+
+public:
+ void operator=(std::vector<std::string>&& s)
+ {
+ readhelper<std::tuple_size<decltype(tu)>::value>(s);
+ }
+};
-template<class T, class ...V>
-void unpack(std::istringstream&& s, T& arg , V& ...args)
+template<class ...T>
+container<T...> list(T&...args)
{
- s>>arg;
- unpack(s,args...);
+ return container<T...>{args...};
}
template<class ...T>
-void unpack(std::string s, T& ...args)
+std::vector<std::string> explode(std::string s)
{
- unpack(std::istringstream{s},args...);
+ std::vector<std::string> vec;
+ std::istringstream d{s};
+ while(d)
+ {
+ std::string st;
+ d>>st;
+ vec.push_back(st);
+ }
+ return std::move(vec);
}
int main(int argc, char **argv) {
- int a;
- double b;
- std::string c;
- unpack("3 4.5 bla", a, b, c); // a = 3; b = 4.5;
- std::cout<<a<<":"<<b<<":"<<c;
+ int a=0;
+ double b=0;
+ list(a, b) = explode("3 4.5");
+ std::cout<<a<<":"<<b;
return 0;
}
\ No newline at end of file
diff --git a/szorg5.cdp b/szorg5.cdp
new file mode 100644
index 0000000..7774d3c
--- /dev/null
+++ b/szorg5.cdp
@@ -0,0 +1 @@
+{"compileCppOptions":["-std\u003dc++11"],"requirements":[]}
\ No newline at end of file
--
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