#include <fstream.hfa>
#include <stdlib.hfa>
#include <array.hfa> // learned has to come afer stdlib, which uses the word tag

// Usage:
// ./a.out 5
// example does an unchecked reference to argv[1]


forall( [@N@] )								$\C{// array dimension}$
array( bool, @N@) & f( array( float, @N@ ) & x, array( float, @N@ ) & y ) {
	array( bool, @N@ ) & ret = *@alloc@();	$\C{// sizeof ret  used by alloc}$
	for ( i; @N@ ) {
		ret[i] = 0.005 > 2 * (abs( x[i] - y[i] )) / (abs( x[i]) + abs(y[i] ));
	}
	return ret;
}










// TODO: standardize argv

int main( int argc, char * argv[] ) {
	const int @n@ = ato( argv[1] );			$\C{// deduce conversion type}$
	array( float, @n@ ) x, y;				$\C{// VLAs}$
	for ( i; n ) {							$\C{// initialize arrays}$
		x[i] = 3.14 / (i + 1);
		y[i] = x[i] + 0.005 ;
	}
	array( bool, @n@ ) & result = @f( x, y )@; $\C{// call}$
	sout | "result: " | nonl;				$\C{// print result}$
	for ( i; n )
		sout | result[i] | nonl;
	sout | nl;
	free( &result );						$\C{// free result storage}$
}
/*
$\$$ ./a.out 5
result: true true true false false
$\$$ ./a.out 7
result: true true true false false false false
*/

void fred() {
	array( float, @10@ ) x;
	array( float, @20@ ) y;
	f( x, x );
	f( y, y );
//	f( x, y );
}

#ifdef SHOWERR1
forall( [M], [N] )
void bad( array(float, M) &x, array(float, N) &y ) {
	f( x, x );		$\C[1.5in]{// ok}$
	f( y, y );		$\C{// ok}$
	f( x, y );		$\C{// error}\CRT$
}
#endif



forall( [M], [N] )
void bad_fixed( array( float, M ) & x, array( float, N ) & y ) {
	if ( M == N )
		f( x, @(array( float, M ) &)@y ); $\C{// cast y to matching type}$
}

// Local Variables: //
// compile-command: "sed -f sedcmd hello-array.cfa > ../build/tmp.cfa; cfa ../build/tmp.cfa -Wall -Wextra" //
// End: //