Index: src/tests/.expect/sum.txt
===================================================================
--- src/tests/.expect/sum.txt	(revision 8a48f4bffb1d837d9b8d1b78efd7a4fb00ede590)
+++ src/tests/.expect/sum.txt	(revision 8a48f4bffb1d837d9b8d1b78efd7a4fb00ede590)
@@ -0,0 +1,5 @@
+sum from 5 to 15 is 95, check 95
+sum from 5 to 15 is 95, check 95
+sum from 0.5 to 1.5 is 9.5, check 9.5
+sum from 0.5 to 1.5 is 9.5, check 9.5
+sum from 5 to 15 is 95 95, check 95 95
Index: src/tests/sum.c
===================================================================
--- src/tests/sum.c	(revision 8a48f4bffb1d837d9b8d1b78efd7a4fb00ede590)
+++ src/tests/sum.c	(revision 8a48f4bffb1d837d9b8d1b78efd7a4fb00ede590)
@@ -0,0 +1,106 @@
+//
+// 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.
+//
+// sum.c -- test resolvers ability to deal with many variables with the same name and to use the minimum number of casts
+//    necessary to disambiguate overloaded variable names.
+//
+// Author           : Peter A. Buhr
+// Created On       : Wed May 27 17:56:53 2015
+// Last Modified By : Peter A. Buhr
+// Last Modified On : Sun Oct 29 10:29:12 2017
+// Update Count     : 260
+//
+
+#include <fstream>
+
+void ?{}( int & c, zero_t ) { c = 0; }
+
+trait sumable( otype T ) {
+	void ?{}( T &, zero_t );							// constructor from 0 literal
+	T ?+?( T, T );										// assortment of additions
+	T ?+=?( T &, T );
+	T ++?( T & );
+	T ?++( T & );
+}; // sumable
+
+forall( otype T | sumable( T ) )						// use trait
+T sum( unsigned int n, T a[] ) {
+	T total = 0;										// instantiate T, select 0
+	for ( unsigned int i = 0; i < n; i += 1 )
+		total += a[i];									// select +
+	return total;
+} // sum
+
+// Not in prelude.
+unsigned char ?+?( unsigned char t1, unsigned char t2 ) { return (int)t1 + t2; } // cast forces integer addition, otherwise recursion
+unsigned char ?+=?( unsigned char & t1, unsigned char t2 ) { t1 = t1 + t2; return t1; }
+unsigned char ++?( unsigned char & t ) { t += 1; return t; }
+unsigned char ?++( unsigned char & t ) { unsigned char temp = t; t += 1; return temp; }
+
+// Not in prelude.
+void ?{}( unsigned char & c, zero_t ) { c = 0; }
+void ?{}( float & f, zero_t ) { f = 0.0; }
+void ?{}( double & d, zero_t ) { d = 0.0; }
+
+int main( void ) {
+	const int low = 5, High = 15, size = High - low;
+
+	unsigned char s = 0, a[size], v = (char)low;
+	for ( int i = 0; i < size; i += 1, v += 1 ) {
+		s += v;
+		a[i] = v;
+	} // for
+	sout | "sum from" | low | "to" | High | "is"
+		| sum( size, (unsigned char *)a ) | ", check" | (int)s | endl;
+
+	int s = 0, a[size], v = low;
+	for ( int i = 0; i < size; i += 1, v += 1 ) {
+		s += (int)v;
+		a[i] = (int)v;
+	} // for
+	sout | "sum from" | low | "to" | High | "is"
+		| sum( size, (int *)a ) | ", check" | (int)s | endl;
+
+	float s = 0.0f, a[size], v = low / 10.0f;
+	for ( int i = 0; i < size; i += 1, v += 0.1f ) {
+		s += (float)v;
+		a[i] = (float)v;
+	} // for
+	sout | "sum from" | low / 10.0f | "to" | High / 10.0f | "is"
+		| sum( size, (float *)a ) | ", check" | (float)s | endl;
+
+	double s = 0.0, a[size], v = low / 10.0;
+	for ( int i = 0; i < size; i += 1, v += 0.1 ) {
+		s += (double)v;
+		a[i] = (double)v;
+	} // for
+	sout | "sum from" | low / 10.0 | "to" | High / 10.0 | "is"
+		| sum( size, (double *)a ) | ", check" | (double)s | endl;
+
+	struct S { int i, j; };
+	void ?{}( S & s ) { s.[i, j] = 0; }
+	void ?{}( S & s, int i, int j ) { s.[i,j] = [i, j]; }
+	void ?{}( S & s, zero_t ) { s.[i,j] = 0; }
+	void ?{}( S & s, one_t ) { s.[i,j] = 1; }
+	S ?+?( S t1, S t2 ) { return (S){ t1.i + t2.i, t1.j + t2.j }; }
+	S ?+=?( S & t1, S t2 ) { t1 = t1 + t2; return t1; }
+	S ++?( S & t ) { t += (S){1}; return t; }
+	S ?++( S & t ) { S temp = t; t += (S){1}; return temp; }
+	ofstream * ?|?( ofstream * os, S v ) { return os | v.i | v.j; }
+
+	S s = (S){0}, a[size], v = { low, low };
+	for ( int i = 0; i < size; i += 1, v += (S){1} ) {
+		s += (S)v;
+		a[i] = (S)v;
+	} // for
+	sout | "sum from" | low | "to" | High | "is"
+		| sum( size, (S *)a ) | ", check" | (S)s | endl;
+} // main
+
+// Local Variables: //
+// tab-width: 4 //
+// compile-command: "cfa sum.c" //
+// End: //