cosmos c backend semantics

gistfile1.py

from co.lang.c import * # var, field, struct, PTR, ptr, NULL, double ...

class A(struct):
    field.x = int
    field.y = double
    field.z = PTR('A')
    
    def __init__(self, x: int, y: double, z: PTR('A')):
        self.x = x
        self.y = y
        self.z = z

# A a0;
# A__init__(&a0, 2, 0.4, NULL);
var.a0 = A
a0 = A(2, 0.4, NULL)

# A * a1;
# a1 = (A*) malloc(sizeof(A));
# A__init__(a1, 2, 0.4, NULL);
var.a1 = PTR(A)
a1 = A(2, 0.4, NULL)