Index: libcfa/src/iostream
===================================================================
--- libcfa/src/iostream	(revision bf71cfdb7285490eee552b461158846f626cc52f)
+++ libcfa/src/iostream	(revision bf71cfdb7285490eee552b461158846f626cc52f)
@@ -0,0 +1,175 @@
+//
+// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
+//
+// The contents of this file are covered under the licence agreement in the
+// file "LICENCE" distributed with Cforall.
+//
+// iostream --
+//
+// Author           : Peter A. Buhr
+// Created On       : Wed May 27 17:56:53 2015
+// Last Modified By : Peter A. Buhr
+// Last Modified On : Sun Jul  1 12:12:22 2018
+// Update Count     : 155
+//
+
+#pragma once
+
+#include "iterator"
+
+trait ostream( dtype ostype ) {
+	// private
+	_Bool sepPrt( ostype & );							// return separator state (on/off)
+	void sepReset( ostype & );							// set separator state to default state
+	void sepReset( ostype &, _Bool );					// set separator and default state
+	const char * sepGetCur( ostype & );					// get current separator string
+	void sepSetCur( ostype &, const char * );			// set current separator string
+	_Bool getNL( ostype & );							// check newline
+	void setNL( ostype &, _Bool );						// saw newline
+	// public
+	void sepOn( ostype & );								// turn separator state on
+	void sepOff( ostype & );							// turn separator state off
+	_Bool sepDisable( ostype & );						// set default state to off, and return previous state
+	_Bool sepEnable( ostype & );						// set default state to on, and return previous state
+
+	const char * sepGet( ostype & );					// get separator string
+	void sepSet( ostype &, const char * );				// set separator to string (15 character maximum)
+	const char * sepGetTuple( ostype & );				// get tuple separator string
+	void sepSetTuple( ostype &, const char * );			// set tuple separator to string (15 character maximum)
+
+	int fail( ostype & );
+	int flush( ostype & );
+	void open( ostype & os, const char * name, const char * mode );
+	void close( ostype & os );
+	ostype & write( ostype &, const char *, size_t );
+	int fmt( ostype &, const char fmt[], ... );
+}; // ostream
+
+// trait writeable( otype T ) {
+// 	forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype &, T );
+// }; // writeable
+
+trait writeable( otype T, dtype ostype | ostream( ostype ) ) {
+	ostype & ?|?( ostype &, T );
+}; // writeable
+
+// implement writable for intrinsic types
+
+forall( dtype ostype | ostream( ostype ) ) {
+	ostype & ?|?( ostype &, _Bool );
+
+	ostype & ?|?( ostype &, char );
+	ostype & ?|?( ostype &, signed char );
+	ostype & ?|?( ostype &, unsigned char );
+
+	ostype & ?|?( ostype &, short int );
+	ostype & ?|?( ostype &, unsigned short int );
+	ostype & ?|?( ostype &, int );
+	ostype & ?|?( ostype &, unsigned int );
+	ostype & ?|?( ostype &, long int );
+	ostype & ?|?( ostype &, long long int );
+	ostype & ?|?( ostype &, unsigned long int );
+	ostype & ?|?( ostype &, unsigned long long int );
+
+	ostype & ?|?( ostype &, float ); // FIX ME: should not be required
+	ostype & ?|?( ostype &, double );
+	ostype & ?|?( ostype &, long double );
+
+	ostype & ?|?( ostype &, float _Complex );
+	ostype & ?|?( ostype &, double _Complex );
+	ostype & ?|?( ostype &, long double _Complex );
+
+	ostype & ?|?( ostype &, const char * );
+	// ostype & ?|?( ostype &, const char16_t * );
+#if ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 ) // char32_t == wchar_t => ambiguous
+	// ostype & ?|?( ostype &, const char32_t * );
+#endif // ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 )
+	// ostype & ?|?( ostype &, const wchar_t * );
+	ostype & ?|?( ostype &, const void * );
+
+	// manipulators
+	ostype & ?|?( ostype &, ostype & (*)( ostype & ) );
+	ostype & endl( ostype & );
+	ostype & sep( ostype & );
+	ostype & sepTuple( ostype & );
+	ostype & sepOn( ostype & );
+	ostype & sepOff( ostype & );
+	ostype & sepDisable( ostype & );
+	ostype & sepEnable( ostype & );
+} // distribution
+
+// tuples
+forall( dtype ostype, otype T, ttype Params | writeable( T, ostype ) | { ostype & ?|?( ostype &, Params ); } )
+ostype & ?|?( ostype & os, T arg, Params rest );
+
+// writes the range [begin, end) to the given stream
+forall( dtype ostype, otype elt_type | writeable( elt_type, ostype ), otype iterator_type | iterator( iterator_type, elt_type ) )
+void write( iterator_type begin, iterator_type end, ostype & os );
+
+forall( dtype ostype, otype elt_type | writeable( elt_type, ostype ), otype iterator_type | iterator( iterator_type, elt_type ) )
+void write_reverse( iterator_type begin, iterator_type end, ostype & os );
+
+//---------------------------------------
+
+trait istream( dtype istype ) {
+	int fail( istype & );
+	int eof( istype & );
+	void open( istype & is, const char * name );
+	void close( istype & is );
+	istype & read( istype &, char *, size_t );
+	istype & ungetc( istype &, char );
+	int fmt( istype &, const char fmt[], ... );
+}; // istream
+
+trait readable( otype T ) {
+	forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, T );
+}; // readable
+
+forall( dtype istype | istream( istype ) ) {
+	istype & ?|?( istype &, _Bool & );
+
+	istype & ?|?( istype &, char & );
+	istype & ?|?( istype &, signed char & );
+	istype & ?|?( istype &, unsigned char & );
+
+	istype & ?|?( istype &, short int & );
+	istype & ?|?( istype &, unsigned short int & );
+	istype & ?|?( istype &, int & );
+	istype & ?|?( istype &, unsigned int & );
+	istype & ?|?( istype &, long int & );
+	istype & ?|?( istype &, long long int & );
+	istype & ?|?( istype &, unsigned long int & );
+	istype & ?|?( istype &, unsigned long long int & );
+
+	istype & ?|?( istype &, float & );
+	istype & ?|?( istype &, double & );
+	istype & ?|?( istype &, long double & );
+
+	istype & ?|?( istype &, float _Complex & );
+	istype & ?|?( istype &, double _Complex & );
+	istype & ?|?( istype &, long double _Complex & );
+
+	// manipulators
+	istype & ?|?( istype &, istype & (*)( istype & ) );
+	istype & endl( istype & is );
+} // distribution
+
+struct _Istream_cstrUC { char * s; };
+_Istream_cstrUC cstr( char * );
+forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, _Istream_cstrUC );
+
+struct _Istream_cstrC { char * s; int size; };
+_Istream_cstrC cstr( char *, int size );
+forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, _Istream_cstrC );
+
+
+#include <time_t.h>										// Duration (constructors) / Time (constructors)
+
+forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype & os, Duration dur );
+forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype & os, Time time );
+
+
+// Local Variables: //
+// mode: c //
+// tab-width: 4 //
+// End: //