CODEWITHSUNDEEP
c++dllvisual-studio-2015dllexport
JeppeSRC
JeppeSRC

Reputation: 99

Return reference to object in DLL

Hi fellow programmers.

I'm having a weird problem and have absolutely no clue of what's going on.

So I'm making a small library with some base things like maths and a window class.

Now to the problem, in my vec2 class I want to return a reference to a object but I get this compile error "error C2059: syntax error: '__declspec(dllexport)'"

class vec2 {
public:
float x, y;

vec2(float x = 0, float y = 0) : x(x), y(y) { }

float FW_API length();
vec2  FW_API normalize();
float FW_API dot(vec2& v);

vec2& FW_API rotate(float angle);
vec2& FW_API translate(float x, float y);
vec2& FW_API translate(vec2& v);

vec2 FW_API operator+(vec2& v);
vec2 FW_API operator-(vec2& v);
vec2 FW_API operator*(vec2& v);
vec2 FW_API operator/(vec2& v);
void FW_API operator+=(vec2& v);
void FW_API operator-=(vec2& v);
void FW_API operator*=(vec2& v);
void FW_API operator/=(vec2& v);

};

FW_API is defined to __declspec(dllexport).

If I remove the ampersands it compiles without issue, but not with them.

So is it even possible to do that when exporting the methods to a dll?

Upvotes: 0

Views: 919

Answers (2)

dark_monk
dark_monk

Reputation: 11

Your issue is that the "&" needs to go on the other side of the declspec:

Instead of:

vec2& FW_API rotate(float angle);

It should be:

vec2 FW_API & rotate(float angle);

Upvotes: 1

JeppeSRC
JeppeSRC

Reputation: 99

Solution

class FW_API vec2

Putting the __declspec(dllexport) on the entire class instead of individual methods.

Upvotes: 1

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