splinterofchaos’s gists

splinterofchaos / glambda-play.cpp

Last active December 10, 2015 04:28

Generic Lambda fun.


	#include <vector>
	#include <algorithm>
	#include <iostream>

	constexpr struct {
	// Ignore perfect forwarding. Assume basic types.
	template< class X, class Y >
	auto operator () ( X x, Y y )
	-> decltype(x*y)

splinterofchaos / generic-lambda-tests.cpp

Last active December 9, 2015 23:49

Tests for Clang's implementation of polymorphic lambdas.

	/* Last tested on:
	* Ubuntu 12.
	*
	* clang version 3.2
	* (https://github.com/faisalv/clang-glambda.git ff891bdfef1794e0e7ad4343a3f696da4785462a)
	* (llvm/trunk 167560)
	*/

	#include <cstdio>
	#include <vector>

splinterofchaos / build log minus errors.txt

Created December 19, 2012 22:12

gclang compile attempt

	make[1]: Entering directory `/home/soc/src/gllvm/build/lib/Support'
	make[1]: Nothing to be done for `all'.
	make[1]: Leaving directory `/home/soc/src/gllvm/build/lib/Support'
	make[1]: Entering directory `/home/soc/src/gllvm/build/lib/TableGen'
	make[1]: Nothing to be done for `all'.
	make[1]: Leaving directory `/home/soc/src/gllvm/build/lib/TableGen'
	make[1]: Entering directory `/home/soc/src/gllvm/build/utils'
	make[2]: Entering directory `/home/soc/src/gllvm/build/utils/FileCheck'
	make[2]: Nothing to be done for `all'.
	make[2]: Leaving directory `/home/soc/src/gllvm/build/utils/FileCheck'

splinterofchaos / list.cpp

Created December 15, 2012 01:03

Several of Haskell's Data.List functions implemented in C++ Data.List: http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-List.html


	#include <algorithm>
	#include <vector>
	#include <iterator>
	#include <iostream>

	template< class F, class X, class S >
	constexpr X foldl( F&& f, X x, const S& s ) {
	return std::accumulate (
	std::begin(s), std::end(s),

splinterofchaos / zip-map-tuple.cpp

Created December 12, 2012 14:17

More fun with tuples.


	#include <tuple>
	#include <iostream>

	template< size_t ...i > struct IndexList {};

	template< size_t ... > struct EnumBuilder;

	// Increment cur until cur == end.
	template< size_t end, size_t cur, size_t ...i >

splinterofchaos / tuple-fun.cpp

Created December 11, 2012 05:21

fun with tuples.


	#include <tuple>
	#include <iostream>

	template< size_t ...i > struct IndexList {};

	template< size_t ... > struct EnumBuilder;

	// Increment cur until cur == end.
	template< size_t end, size_t cur, size_t ...i >

splinterofchaos / does-it-run.cpp

Created December 9, 2012 23:09

Does it run?

	#include <tuple>
	template< class X > struct Hold {
	X x;
	constexpr Hold( X x ) : x(std::move(x)) { }
	};
	constexpr auto a = Hold<int>( 1 );
	constexpr auto b = Hold<std::tuple<int>>( std::tuple<int>(1) );

splinterofchaos / moving-lambdas.cpp

Created December 1, 2012 14:24

To move a lambda.



	#include <iostream>
	#include <vector>
	#include <algorithm>

	using namespace std;

	void print_vec( const char* const name, const vector<int>& v ) {
	cout << name << " = ";

splinterofchaos / arrow.cpp

Created November 30, 2012 14:33

Arrows and Kleislies


	#include <memory>
	#include <iostream>
	#include <sstream>
	#include <utility>
	#include <algorithm>
	#include <iterator>

	/* MakeT T : X -> T X */
	template< template<class...> class T > struct MakeT {

splinterofchaos / template error

Created November 28, 2012 18:31

An error message for one line of code involving template trickery.

	examples.cpp: In function 'int main()':
	examples.cpp:234:10: warning: variable 'o' set but not used [-Wunused-but-set-variable]
	In file included from /usr/include/c++/4.7/bits/stl_algo.h:68:0,
	from /usr/include/c++/4.7/algorithm:63,
	from Pure.h:4,
	from examples.cpp:2:
	/usr/include/c++/4.7/functional: In instantiation of 'static _Res std::_Function_handler<_Res(_ArgTypes ...), _Functor>::_M_invoke(const std::_Any_data&, _ArgTypes ...) [with _Res = std::unique_ptr<std::pair<int, int> >; _Functor = pure::arrow::KleisliF<std::unique_ptr, int, std::pair<int, int>, pure::Composition<pure::arrow::KleisliF<std::unique_ptr, std::pair<int, int>, std::pair<int, int>, pure::BComposition<pure::Part<pure::monad::LiftM, pure::MakeT<std::pair> >, std::function<std::unique_ptr<int>(int)>, std::function<std::unique_ptr<int>(int)> > >, pure::arrow::Duplicate> >; _ArgTypes = {int}]':
	/usr/include/c++/4.7/functional:2298:6: required from 'std::function<_Res(_ArgTypes ...)>::fun

Scott Prager splinterofchaos