• WhatMeWorry (20/20) Apr 08 2016 This might be a very simple fix, but I've been fighting this for
• =?UTF-8?Q?Ali_=c3=87ehreli?= (17/36) Apr 08 2016 Collision is a variable. Did you mean
• jmh530 (4/5) Apr 08 2016 I was getting that same error recently, but I forgot what was

WhatMeWorry <kheaser gmail.com> writes:

This might be a very simple fix, but I've been fighting this for 
more hours than I care to admit to.


std.typecons says "Tuple of values, for example Tuple!(int, 
string) is a record that stores an int and a string. Tuple can be 
used to bundle values together, notably when returning multiple 
values from a function."


But when I try this in practice with

// typedef std::tuple<GLboolean, Direction, glm::vec2> Collision; 
// porting C++ to
Tuple!(GLboolean, Direction, vec2) Collision;


Collision CheckCollision(BallObject one, GameObject two) // AABB 
- Circle collision
{


DMD 2.071.0, keeps returning at the function signature:
Error: functions cannot return a tuple

I've also tried,
alias Collision = AliasSeq!(GLboolean, Direction, vec2);
but same error.

Am I doing anything stupid here?
thanks.

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 04/08/2016 01:53 PM, WhatMeWorry wrote:
 This might be a very simple fix, but I've been fighting this for more
 hours than I care to admit to.


 std.typecons says "Tuple of values, for example Tuple!(int, string) is a
 record that stores an int and a string. Tuple can be used to bundle
 values together, notably when returning multiple values from a function."


 But when I try this in practice with

 // typedef std::tuple<GLboolean, Direction, glm::vec2> Collision; //
 porting C++ to
 Tuple!(GLboolean, Direction, vec2) Collision;

Collision is a variable. Did you mean

alias Collision = Tuple!(GLboolean, Direction, vec2);

 Collision CheckCollision(BallObject one, GameObject two) // AABB -

That won't work because you should have a type instead of Collision (a 
variable).

 Circle collision
 {


 DMD 2.071.0, keeps returning at the function signature:
 Error: functions cannot return a tuple

 I've also tried,
 alias Collision = AliasSeq!(GLboolean, Direction, vec2);
 but same error.

 Am I doing anything stupid here?
 thanks.

And yes, functions can return tuples: :)

import std.typecons;

struct S {
     int i;
}

Tuple!(int, S) foo() {
     return tuple(42, S(43));
}

void main() {
     auto a = foo();
}

Ali

jmh530 <john.michael.hall gmail.com> writes:

On Friday, 8 April 2016 at 20:58:46 UTC, Ali Çehreli wrote:
 And yes, functions can return tuples: :)

I was getting that same error recently, but I forgot what was 
causing it. He mentions AliasSeq above, could the error be 
referring to compile time argument lists?