Expected primary-expression before '.'

Using Arduino Programming Questions
1

Hi all,
I'am working with this libray here but I have an error when I try to comile with Arduino and I don't know why.
For these lines, I got expected primary-expression before '.' token for each attribut.

FusionVector3 gyroscopeSensitivity = {
   .axis.x = 1.0f,
   .axis.y = 1.0f,
   .axis.z = 1.0f,
};

So I've searched the declarion for FusionVector3, I found this

typedef union {
   float array[3];

   struct {
       float x;
       float y;
       float z;
   } axis;
} FusionVector3;

I've tried to remove dot before axis but this isn't the solution, I've never work with union with struct inside....

2 
FusionVector3 gyroscopeSensitivity = {
   1.0f,
   1.0f,
   1.0f,
};
3

Your library is a C library, rather than an Arduino Library (which is C++.)
C has a feature called "designated initializers" that C++ doesn't have:

https://www.ibm.com/docs/en/zos/2.4.0?topic=initializers-designated-aggregate-types-c-only

MissDrew's suggested fix should work fine, especially since all three initial values are the same.

4

Ok thanks for you answer. So when you say

The fix should only work if all values are the same ?

5

If they're not the same, you would have to make sure that the x, y, and z values were specified in the correct order (the same order that they're defined in the struct.)

6

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