• Paul D Anderson (26/26) Aug 08 2014 When I try to compile these two functions, the second function is
• Rikki Cattermole (25/51) Aug 09 2014 Cannot reproduce on either 2.065 or git head (according to dpaste).
• Paul D Anderson (6/8) Aug 09 2014 You are right. I had the functions in a unittest block that got

"Paul D Anderson" <claude.rains msn.com> writes:

When I try to compile these two functions, the second function is 
flagged with an already defined error:

bool testRoundTrip(T, U)(T first, U second) if (isIntegral!T && 
isFloatingPoint!U)
{
     return false;
}
bool testRoundTrip(U, T)(U first, T second) if (isIntegral!T && 
isFloatingPoint!U)
{
     return false;
}

They look to me to be distinct functions, one with an integral 
parameter followed by a floating point parameter and the other 
with a floating point parameter followed by an integral parameter.

At first I thought this was a template problem, but the following 
code also raises the same error.

bool testRoundTrip(int first, double second)
{
     return false;
}
bool testRoundTrip(double first, int second)
{
     return false;
}

What's the problem?

Rikki Cattermole <alphaglosined gmail.com> writes:

On 9/08/2014 6:19 p.m., Paul D Anderson wrote:
 When I try to compile these two functions, the second function is
 flagged with an already defined error:

 bool testRoundTrip(T, U)(T first, U second) if (isIntegral!T &&
 isFloatingPoint!U)
 {
      return false;
 }
 bool testRoundTrip(U, T)(U first, T second) if (isIntegral!T &&
 isFloatingPoint!U)
 {
      return false;
 }

 They look to me to be distinct functions, one with an integral parameter
 followed by a floating point parameter and the other with a floating
 point parameter followed by an integral parameter.

 At first I thought this was a template problem, but the following code
 also raises the same error.

 bool testRoundTrip(int first, double second)
 {
      return false;
 }
 bool testRoundTrip(double first, int second)
 {
      return false;
 }

 What's the problem?

Cannot reproduce on either 2.065 or git head (according to dpaste).

import std.traits;

bool testRoundTrip(T, U)(T first, U second) if (isIntegral!T && 
isFloatingPoint!U)
{
     return first == 1;
}
bool testRoundTrip(U, T)(U first, T second) if (isIntegral!T && 
isFloatingPoint!U)
{
     return second == 2;
}

void main(){
	int x = 1;
	double y = 1.1;
	assert(testRoundTrip(x, y));
	
	x = 2;
	y = 2.2;
	assert(testRoundTrip(y, x));
	
	assert(testRoundTrip(1, 1.1));
	assert(testRoundTrip(2.2, 2));
}

"Paul D Anderson" <claude.rains msn.com> writes:

On Saturday, 9 August 2014 at 07:07:42 UTC, Rikki Cattermole 
wrote:
 Cannot reproduce on either 2.065 or git head (according to 
 dpaste).

You are right. I had the functions in a unittest block that got 
executed more than once so the second execution was a 
redefinition. Thanks for taking the time to check.

Paul