Including generated code

1

Hi,

I am doing some calculations with maxima and wanna use the results in rust.

For example I exported from maxima:

let G_k69 = dt;
let G_k77 = 1;
let G_k710 = dt;
let G_k81 = dt*(2*a_zm_b*q2-2*a_ym_b*q3);
let G_k82 = dt*(2*a_zm_b*q3+2*a_ym_b*q2);
let G_k83 = dt*(-(4*a_xm_b*q2)+2*a_ym_b*q1+2*a_zm_b*q0);
let G_k84 = dt*(-(4*a_xm_b*q3)+2*a_zm_b*q1-2*a_ym_b*q0);
let G_k88 = 1;
let G_k91 = dt*(2*a_xm_b*q3-2*a_zm_b*q1);
let G_k92 = dt*(2*a_xm_b*q2-4*a_ym_b*q1-2*a_zm_b*q0);
let G_k93 = dt*(2*a_zm_b*q3+2*a_xm_b*q1);
let G_k94 = dt*(-(4*a_ym_b*q3)+2*a_zm_b*q2+2*a_xm_b*q0);
let G_k99 = 1;
let G_k101 = dt*(2*a_ym_b*q1-2*a_xm_b*q2);
let G_k102 = dt*(2*a_xm_b*q3-4*a_zm_b*q1+2*a_ym_b*q0);
let G_k103 = dt*(2*a_ym_b*q3-4*a_zm_b*q2-2*a_xm_b*q0);
let G_k104 = dt*(2*a_ym_b*q2+2*a_xm_b*q1);
let G_k1010 = 1;
let G_k1111 = 1;
let G_k1212 = 1;
let G_k1313 = 1;
// Calculate next states
self.q0 = -((dt*q3*w_z_b)/2)-(dt*q2*w_y_b)/2-(dt*q1*w_x_b)/2+q0;
self.q1 = (dt*q2*w_z_b)/2-(dt*q3*w_y_b)/2+(dt*q0*w_x_b)/2+q1;
self.q2 = -((dt*q1*w_z_b)/2)+(dt*q0*w_y_b)/2+(dt*q3*w_x_b)/2+q2;
self.q3 = (dt*q0*w_z_b)/2+(dt*q1*w_y_b)/2-(dt*q2*w_x_b)/2+q3;

Now I wanna use that codesnipped and tried the include!() macro, but with no success: expected expression, found let statement

What is the proper way to include generated code. The code shall generate some variables and overwriting some variables from the object it self.

2

How did you use that macro? It should be working as if you've just copy-pasted this code at the place of macro, so placing it directly in function body, for example, should show no errors.

3

This is what I tried. I added the include!() inside of the function body.

4

According to the include docs, emphasis mine:

Parses a file as an expression or an item according to the context.

The contents of your file is neither an expression, nor an item, it is a sequence of statements. You can convert a sequence of statements into an expression by wrapping them in a block { ... } to create a block expression.

3 Likes
5

Thanks I will try this out. In the meantime I generated full rust functions and using them as modules